adding comment

[wxWidgets.git] / include / wx / log.h

diff --git a/include/wx/log.h b/include/wx/log.h
index 0e5c4e075784992832bebf4b9028a9dbd95f3bd3..e3e1f54adf4c588df38a7c45800dfe5142cd626c 100644 (file)
--- a/include/wx/log.h
+++ b/include/wx/log.h
@@ -15,30 +15,26 @@
 #include "wx/defs.h"
 
 // ----------------------------------------------------------------------------
 #include "wx/defs.h"
 
 // ----------------------------------------------------------------------------

-// common constants for use in wxUSE_LOG/!wxUSE_LOG
+// types

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-// the trace masks have been superceded by symbolic trace constants, they're
-// for compatibility only andwill be removed soon - do NOT use them
+// NB: this is needed even if wxUSE_LOG == 0
+typedef unsigned long wxLogLevel;

 
 

-// meaning of different bits of the trace mask (which allows selectively
-// enable/disable some trace messages)
-#define wxTraceMemAlloc 0x0001  // trace memory allocation (new/delete)
-#define wxTraceMessages 0x0002  // trace window messages/X callbacks
-#define wxTraceResAlloc 0x0004  // trace GDI resource allocation
-#define wxTraceRefCount 0x0008  // trace various ref counting operations
+// the trace masks have been superseded by symbolic trace constants, they're
+// for compatibility only and will be removed soon - do NOT use them
+#if WXWIN_COMPATIBILITY_2_8
+    #define wxTraceMemAlloc 0x0001  // trace memory allocation (new/delete)
+    #define wxTraceMessages 0x0002  // trace window messages/X callbacks
+    #define wxTraceResAlloc 0x0004  // trace GDI resource allocation
+    #define wxTraceRefCount 0x0008  // trace various ref counting operations

 
 

-#ifdef  __WXMSW__
-    #define wxTraceOleCalls 0x0100  // OLE interface calls
-#endif
+    #ifdef  __WINDOWS__
+        #define wxTraceOleCalls 0x0100  // OLE interface calls
+    #endif

 
 

-// ----------------------------------------------------------------------------
-// types
-// ----------------------------------------------------------------------------
-
-// NB: these types are needed even if wxUSE_LOG == 0
-typedef unsigned long wxTraceMask;
-typedef unsigned long wxLogLevel;
+    typedef unsigned long wxTraceMask;
+#endif // WXWIN_COMPATIBILITY_2_8

 
 // ----------------------------------------------------------------------------
 // headers
 
 // ----------------------------------------------------------------------------
 // headers


@@ -47,6 +43,16 @@ typedef unsigned long wxLogLevel;
 #include "wx/string.h"
 #include "wx/strvararg.h"
 
 #include "wx/string.h"
 #include "wx/strvararg.h"
 

+// ----------------------------------------------------------------------------
+// forward declarations
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_FWD_BASE wxObject;
+
+#if wxUSE_GUI
+    class WXDLLIMPEXP_FWD_CORE wxFrame;
+#endif // wxUSE_GUI
+

 #if wxUSE_LOG
 
 #include "wx/arrstr.h"
 #if wxUSE_LOG
 
 #include "wx/arrstr.h"


@@ -56,32 +62,49 @@ typedef unsigned long wxLogLevel;
 #endif
 
 #include "wx/dynarray.h"
 #endif
 
 #include "wx/dynarray.h"

+#include "wx/hashmap.h"
+
+#if wxUSE_THREADS
+    #include "wx/thread.h"
+#endif // wxUSE_THREADS

 
 

+// wxUSE_LOG_DEBUG enables the debug log messages

 #ifndef wxUSE_LOG_DEBUG
 #ifndef wxUSE_LOG_DEBUG

-#  ifdef __WXDEBUG__
-#    define wxUSE_LOG_DEBUG 1
-#  else // !__WXDEBUG__
-#    define wxUSE_LOG_DEBUG 0
-#  endif
+    #if wxDEBUG_LEVEL
+        #define wxUSE_LOG_DEBUG 1
+    #else // !wxDEBUG_LEVEL
+        #define wxUSE_LOG_DEBUG 0
+    #endif

 #endif
 
 #endif
 

-// ----------------------------------------------------------------------------
-// forward declarations
-// ----------------------------------------------------------------------------
-
-#if wxUSE_GUI
-    class WXDLLIMPEXP_CORE wxTextCtrl;
-    class WXDLLIMPEXP_CORE wxLogFrame;
-    class WXDLLIMPEXP_CORE wxFrame;
-    class WXDLLIMPEXP_CORE wxWindow;
-#endif // wxUSE_GUI
+// wxUSE_LOG_TRACE enables the trace messages, they are disabled by default
+#ifndef wxUSE_LOG_TRACE
+    #if wxDEBUG_LEVEL
+        #define wxUSE_LOG_TRACE 1
+    #else // !wxDEBUG_LEVEL
+        #define wxUSE_LOG_TRACE 0
+    #endif
+#endif // wxUSE_LOG_TRACE
+
+// wxLOG_COMPONENT identifies the component which generated the log record and
+// can be #define'd to a user-defined value when compiling the user code to use
+// component-based filtering (see wxLog::SetComponentLevel())
+#ifndef wxLOG_COMPONENT
+    // this is a variable and not a macro in order to allow the user code to
+    // just #define wxLOG_COMPONENT without #undef'ining it first
+    extern WXDLLIMPEXP_DATA_BASE(const char *) wxLOG_COMPONENT;
+
+    #ifdef WXBUILDING
+        #define wxLOG_COMPONENT "wx"
+    #endif
+#endif

 
 // ----------------------------------------------------------------------------
 // constants
 // ----------------------------------------------------------------------------
 
 // different standard log levels (you may also define your own)
 
 // ----------------------------------------------------------------------------
 // constants
 // ----------------------------------------------------------------------------
 
 // different standard log levels (you may also define your own)

-enum
+enum wxLogLevelValues

 {
     wxLOG_FatalError, // program can't continue, abort immediately
     wxLOG_Error,      // a serious error, user must be informed about it
 {
     wxLOG_FatalError, // program can't continue, abort immediately
     wxLOG_Error,      // a serious error, user must be informed about it


@@ -105,12 +128,213 @@ enum
 #define wxTRACE_ResAlloc wxT("resalloc") // trace GDI resource allocation
 #define wxTRACE_RefCount wxT("refcount") // trace various ref counting operations
 
 #define wxTRACE_ResAlloc wxT("resalloc") // trace GDI resource allocation
 #define wxTRACE_RefCount wxT("refcount") // trace various ref counting operations
 

-#ifdef  __WXMSW__
+#ifdef  __WINDOWS__

     #define wxTRACE_OleCalls wxT("ole")  // OLE interface calls
 #endif
 
 #include "wx/iosfwrap.h"
 
     #define wxTRACE_OleCalls wxT("ole")  // OLE interface calls
 #endif
 
 #include "wx/iosfwrap.h"
 

+// ----------------------------------------------------------------------------
+// information about a log record, i.e. unit of log output
+// ----------------------------------------------------------------------------
+
+class wxLogRecordInfo
+{
+public:
+    // default ctor creates an uninitialized object
+    wxLogRecordInfo()
+    {
+        memset(this, 0, sizeof(*this));
+    }
+
+    // normal ctor, used by wxLogger specifies the location of the log
+    // statement; its time stamp and thread id are set up here
+    wxLogRecordInfo(const char *filename_,
+                    int line_,
+                    const char *func_,
+                    const char *component_)
+    {
+        filename = filename_;
+        func = func_;
+        line = line_;
+        component = component_;
+
+        timestamp = time(NULL);
+
+#if wxUSE_THREADS
+        threadId = wxThread::GetCurrentId();
+#endif // wxUSE_THREADS
+
+        m_data = NULL;
+    }
+
+    // we need to define copy ctor and assignment operator because of m_data
+    wxLogRecordInfo(const wxLogRecordInfo& other)
+    {
+        Copy(other);
+    }
+
+    wxLogRecordInfo& operator=(const wxLogRecordInfo& other)
+    {
+        if ( &other != this )
+        {
+            delete m_data;
+            Copy(other);
+        }
+
+        return *this;
+    }
+
+    // dtor is non-virtual, this class is not meant to be derived from
+    ~wxLogRecordInfo()
+    {
+        delete m_data;
+    }
+
+
+    // the file name and line number of the file where the log record was
+    // generated, if available or NULL and 0 otherwise
+    const char *filename;
+    int line;
+
+    // the name of the function where the log record was generated (may be NULL
+    // if the compiler doesn't support __FUNCTION__)
+    const char *func;
+
+    // the name of the component which generated this message, may be NULL if
+    // not set (i.e. wxLOG_COMPONENT not defined)
+    const char *component;
+
+    // time of record generation
+    time_t timestamp;
+
+#if wxUSE_THREADS
+    // id of the thread which logged this record
+    wxThreadIdType threadId;
+#endif // wxUSE_THREADS
+
+
+    // store an arbitrary value in this record context
+    //
+    // wxWidgets always uses keys starting with "wx.", e.g. "wx.sys_error"
+    void StoreValue(const wxString& key, wxUIntPtr val)
+    {
+        if ( !m_data )
+            m_data = new ExtraData;
+
+        m_data->numValues[key] = val;
+    }
+
+    void StoreValue(const wxString& key, const wxString& val)
+    {
+        if ( !m_data )
+            m_data = new ExtraData;
+
+        m_data->strValues[key] = val;
+    }
+
+
+    // these functions retrieve the value of either numeric or string key,
+    // return false if not found
+    bool GetNumValue(const wxString& key, wxUIntPtr *val) const
+    {
+        if ( !m_data )
+            return false;
+
+        wxStringToNumHashMap::const_iterator it = m_data->numValues.find(key);
+        if ( it == m_data->numValues.end() )
+            return false;
+
+        *val = it->second;
+
+        return true;
+    }
+
+    bool GetStrValue(const wxString& key, wxString *val) const
+    {
+        if ( !m_data )
+            return false;
+
+        wxStringToStringHashMap::const_iterator it = m_data->strValues.find(key);
+        if ( it == m_data->strValues.end() )
+            return false;
+
+        *val = it->second;
+
+        return true;
+    }
+
+private:
+    void Copy(const wxLogRecordInfo& other)
+    {
+        memcpy(this, &other, sizeof(*this));
+        if ( other.m_data )
+           m_data = new ExtraData(*other.m_data);
+    }
+
+    // extra data associated with the log record: this is completely optional
+    // and can be used to pass information from the log function to the log
+    // sink (e.g. wxLogSysError() uses this to pass the error code)
+    struct ExtraData
+    {
+        wxStringToNumHashMap numValues;
+        wxStringToStringHashMap strValues;
+    };
+
+    // NULL if not used
+    ExtraData *m_data;
+};
+
+#define wxLOG_KEY_TRACE_MASK "wx.trace_mask"
+
+// ----------------------------------------------------------------------------
+// log record: a unit of log output
+// ----------------------------------------------------------------------------
+
+struct wxLogRecord
+{
+    wxLogRecord(wxLogLevel level_,
+                const wxString& msg_,
+                const wxLogRecordInfo& info_)
+        : level(level_),
+          msg(msg_),
+          info(info_)
+    {
+    }
+
+    wxLogLevel level;
+    wxString msg;
+    wxLogRecordInfo info;
+};
+
+// ----------------------------------------------------------------------------
+// Derive from this class to customize format of log messages.
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_BASE wxLogFormatter
+{
+public:
+    // Default constructor.
+    wxLogFormatter() { }
+
+    // Trivial but virtual destructor for the base class.
+    virtual ~wxLogFormatter() { }
+
+
+    // Override this method to implement custom formatting of the given log
+    // record. The default implementation simply prepends a level-dependent
+    // prefix to the message and optionally adds a time stamp.
+    virtual wxString Format(wxLogLevel level,
+                            const wxString& msg,
+                            const wxLogRecordInfo& info) const;
+
+protected:
+    // Override this method to change just the time stamp formatting. It is
+    // called by default Format() implementation.
+    virtual wxString FormatTime(time_t t) const;
+};
+
+

 // ----------------------------------------------------------------------------
 // derive from this class to redirect (or suppress, or ...) log messages
 // normally, only a single instance of this class exists but it's not enforced
 // ----------------------------------------------------------------------------
 // derive from this class to redirect (or suppress, or ...) log messages
 // normally, only a single instance of this class exists but it's not enforced


@@ -120,46 +344,106 @@ class WXDLLIMPEXP_BASE wxLog
 {
 public:
     // ctor
 {
 public:
     // ctor

-    wxLog(){}
+    wxLog() : m_formatter(new wxLogFormatter) { }
+
+    // make dtor virtual for all derived classes
+    virtual ~wxLog();
+

 
 

-    // these functions allow to completely disable all log messages
+    // log messages selection
+    // ----------------------

 
 

-    // is logging disabled now?
-    static bool IsEnabled() { return ms_doLog; }
+    // these functions allow to completely disable all log messages or disable
+    // log messages at level less important than specified for the current
+    // thread
+
+    // is logging enabled at all now?
+    static bool IsEnabled()
+    {
+#if wxUSE_THREADS
+        if ( !wxThread::IsMain() )
+            return IsThreadLoggingEnabled();
+#endif // wxUSE_THREADS
+
+        return ms_doLog;
+    }

 
     // change the flag state, return the previous one
 
     // change the flag state, return the previous one

-    static bool EnableLogging(bool doIt = true)
-        { bool doLogOld = ms_doLog; ms_doLog = doIt; return doLogOld; }
+    static bool EnableLogging(bool enable = true)
+    {
+#if wxUSE_THREADS
+        if ( !wxThread::IsMain() )
+            return EnableThreadLogging(enable);
+#endif // wxUSE_THREADS
+
+        bool doLogOld = ms_doLog;
+        ms_doLog = enable;
+        return doLogOld;
+    }
+
+    // return the current global log level
+    static wxLogLevel GetLogLevel() { return ms_logLevel; }
+
+    // set global log level: messages with level > logLevel will not be logged
+    static void SetLogLevel(wxLogLevel logLevel) { ms_logLevel = logLevel; }
+
+    // set the log level for the given component
+    static void SetComponentLevel(const wxString& component, wxLogLevel level);
+
+    // return the effective log level for this component, falling back to
+    // parent component and to the default global log level if necessary
+    //
+    // NB: component argument is passed by value and not const reference in an
+    //     attempt to encourage compiler to avoid an extra copy: as we modify
+    //     the component internally, we'd create one anyhow and like this it
+    //     can be avoided if the string is a temporary anyhow
+    static wxLogLevel GetComponentLevel(wxString component);
+
+
+    // is logging of messages from this component enabled at this level?
+    //
+    // usually always called with wxLOG_COMPONENT as second argument
+    static bool IsLevelEnabled(wxLogLevel level, wxString component)
+    {
+        return IsEnabled() && level <= GetComponentLevel(component);
+    }
+
+
+    // enable/disable messages at wxLOG_Verbose level (only relevant if the
+    // current log level is greater or equal to it)
+    //
+    // notice that verbose mode can be activated by the standard command-line
+    // '--verbose' option
+    static void SetVerbose(bool bVerbose = true) { ms_bVerbose = bVerbose; }
+
+    // check if verbose messages are enabled
+    static bool GetVerbose() { return ms_bVerbose; }

 
 

-    // static sink function - see DoLog() for function to overload in the
-    // derived classes
-    static void OnLog(wxLogLevel level, const wxChar *szString, time_t t);

 
     // message buffering
 
     // message buffering

+    // -----------------

 
     // flush shows all messages if they're not logged immediately (FILE
 
     // flush shows all messages if they're not logged immediately (FILE

-    // and iostream logs don't need it, but wxGuiLog does to avoid showing
+    // and iostream logs don't need it, but wxLogGui does to avoid showing

     // 17 modal dialogs one after another)
     virtual void Flush();
 
     // 17 modal dialogs one after another)
     virtual void Flush();
 

-    // flush the active target if any
-    static void FlushActive()
-    {
-        if ( !ms_suspendCount )
-        {
-            wxLog *log = GetActiveTarget();
-            if ( log )
-                log->Flush();
-        }
-    }
+    // flush the active target if any and also output any pending messages from
+    // background threads
+    static void FlushActive();

 
 

-    // only one sink is active at each moment
-    // get current log target, will call wxApp::CreateLogTarget() to
-    // create one if none exists
+    // only one sink is active at each moment get current log target, will call
+    // wxAppTraits::CreateLogTarget() to create one if none exists

     static wxLog *GetActiveTarget();
 
     static wxLog *GetActiveTarget();
 

-    // change log target, pLogger may be NULL
-    static wxLog *SetActiveTarget(wxLog *pLogger);
+    // change log target, logger may be NULL
+    static wxLog *SetActiveTarget(wxLog *logger);
+
+#if wxUSE_THREADS
+    // change log target for the current thread only, shouldn't be called from
+    // the main thread as it doesn't use thread-specific log target
+    static wxLog *SetThreadActiveTarget(wxLog *logger);
+#endif // wxUSE_THREADS

 
     // suspend the message flushing of the main target until the next call
     // to Resume() - this is mainly for internal use (to prevent wxYield()
 
     // suspend the message flushing of the main target until the next call
     // to Resume() - this is mainly for internal use (to prevent wxYield()


@@ -169,18 +453,13 @@ public:
     // must be called for each Suspend()!
     static void Resume() { ms_suspendCount--; }
 
     // must be called for each Suspend()!
     static void Resume() { ms_suspendCount--; }
 

-    // functions controlling the default wxLog behaviour
-    // verbose mode is activated by standard command-line '-verbose'
-    // option
-    static void SetVerbose(bool bVerbose = true) { ms_bVerbose = bVerbose; }
-
-    // Set log level.  Log messages with level > logLevel will not be logged.
-    static void SetLogLevel(wxLogLevel logLevel) { ms_logLevel = logLevel; }
-

     // should GetActiveTarget() try to create a new log object if the
     // current is NULL?
     static void DontCreateOnDemand();
 
     // should GetActiveTarget() try to create a new log object if the
     // current is NULL?
     static void DontCreateOnDemand();
 

+    // Make GetActiveTarget() create a new log object again.
+    static void DoCreateOnDemand();
+

     // log the count of repeating messages instead of logging the messages
     // multiple times
     static void SetRepetitionCounting(bool bRepetCounting = true)
     // log the count of repeating messages instead of logging the messages
     // multiple times
     static void SetRepetitionCounting(bool bRepetCounting = true)


@@ -189,12 +468,8 @@ public:
     // gets duplicate counting status
     static bool GetRepetitionCounting() { return ms_bRepetCounting; }
 
     // gets duplicate counting status
     static bool GetRepetitionCounting() { return ms_bRepetCounting; }
 

-    // trace mask (see wxTraceXXX constants for details)
-    static void SetTraceMask(wxTraceMask ulMask) { ms_ulTraceMask = ulMask; }
-

     // add string trace mask
     // add string trace mask

-    static void AddTraceMask(const wxString& str)
-        { ms_aTraceMasks.push_back(str); }
+    static void AddTraceMask(const wxString& str);

 
     // add string trace mask
     static void RemoveTraceMask(const wxString& str);
 
     // add string trace mask
     static void RemoveTraceMask(const wxString& str);


@@ -202,41 +477,88 @@ public:
     // remove all string trace masks
     static void ClearTraceMasks();
 
     // remove all string trace masks
     static void ClearTraceMasks();
 

-    // get string trace masks
-    static const wxArrayString &GetTraceMasks() { return ms_aTraceMasks; }
+    // get string trace masks: note that this is MT-unsafe if other threads can
+    // call AddTraceMask() concurrently
+    static const wxArrayString& GetTraceMasks();
+
+    // is this trace mask in the list?
+    static bool IsAllowedTraceMask(const wxString& mask);

 
 

-    // sets the timestamp string: this is used as strftime() format string
-    // for the log targets which add time stamps to the messages - set it
-    // to NULL to disable time stamping completely.
-    static void SetTimestamp(const wxChar *ts) { ms_timestamp = ts; }

 
 

+    // log formatting
+    // -----------------

 
 

-    // accessors
+    // Change wxLogFormatter object used by wxLog to format the log messages.
+    //
+    // wxLog takes ownership of the pointer passed in but the caller is
+    // responsible for deleting the returned pointer.
+    wxLogFormatter* SetFormatter(wxLogFormatter* formatter);

 
 

-    // gets the verbose status
-    static bool GetVerbose() { return ms_bVerbose; }

 
 

-    // get trace mask
-    static wxTraceMask GetTraceMask() { return ms_ulTraceMask; }
+    // All the time stamp related functions below only work when the default
+    // wxLogFormatter is being used. Defining a custom formatter overrides them
+    // as it could use its own time stamp format or format messages without
+    // using time stamp at all.

 
 

-    // is this trace mask in the list?
-    static bool IsAllowedTraceMask(const wxChar *mask);

 
 

-    // return the current loglevel limit
-    static wxLogLevel GetLogLevel() { return ms_logLevel; }
+    // sets the time stamp string format: this is used as strftime() format
+    // string for the log targets which add time stamps to the messages; set
+    // it to empty string to disable time stamping completely.
+    static void SetTimestamp(const wxString& ts) { ms_timestamp = ts; }

 
 

-    // get the current timestamp format string (may be NULL)
-    static const wxChar *GetTimestamp() { return ms_timestamp; }
+    // disable time stamping of log messages
+    static void DisableTimestamp() { SetTimestamp(wxEmptyString); }

 
 
 
 

-    // helpers
+    // get the current timestamp format string (maybe empty)
+    static const wxString& GetTimestamp() { return ms_timestamp; }

 
 

-    // put the time stamp into the string if ms_timestamp != NULL (don't
-    // change it otherwise)
+
+
+    // helpers: all functions in this section are mostly for internal use only,
+    // don't call them from your code even if they are not formally deprecated
+
+    // put the time stamp into the string if ms_timestamp is not empty (don't
+    // change it otherwise); the first overload uses the current time.

     static void TimeStamp(wxString *str);
     static void TimeStamp(wxString *str);

+    static void TimeStamp(wxString *str, time_t t);
+
+    // these methods should only be called from derived classes DoLogRecord(),
+    // DoLogTextAtLevel() and DoLogText() implementations respectively and
+    // shouldn't be called directly, use logging functions instead
+    void LogRecord(wxLogLevel level,
+                   const wxString& msg,
+                   const wxLogRecordInfo& info)
+    {
+        DoLogRecord(level, msg, info);
+    }

 
 

-    // make dtor virtual for all derived classes
-    virtual ~wxLog();
+    void LogTextAtLevel(wxLogLevel level, const wxString& msg)
+    {
+        DoLogTextAtLevel(level, msg);
+    }
+
+    void LogText(const wxString& msg)
+    {
+        DoLogText(msg);
+    }
+
+    // this is a helper used by wxLogXXX() functions, don't call it directly
+    // and see DoLog() for function to overload in the derived classes
+    static void OnLog(wxLogLevel level,
+                      const wxString& msg,
+                      const wxLogRecordInfo& info);
+
+    // version called when no information about the location of the log record
+    // generation is available (but the time stamp is), it mainly exists for
+    // backwards compatibility, don't use it in new code
+    static void OnLog(wxLogLevel level, const wxString& msg, time_t t);
+
+    // a helper calling the above overload with current time
+    static void OnLog(wxLogLevel level, const wxString& msg)
+    {
+        OnLog(level, msg, time(NULL));
+    }

 
 
     // this method exists for backwards compatibility only, don't use
 
 
     // this method exists for backwards compatibility only, don't use


@@ -244,36 +566,117 @@ public:
 
 #if WXWIN_COMPATIBILITY_2_6
     // this function doesn't do anything any more, don't call it
 
 #if WXWIN_COMPATIBILITY_2_6
     // this function doesn't do anything any more, don't call it

-    wxDEPRECATED( static wxChar *SetLogBuffer(wxChar *buf, size_t size = 0) );
-#endif
+    static wxDEPRECATED_INLINE(
+        wxChar *SetLogBuffer(wxChar *, size_t = 0), return NULL;
+    );
+#endif // WXWIN_COMPATIBILITY_2_6
+
+    // don't use integer masks any more, use string trace masks instead
+#if WXWIN_COMPATIBILITY_2_8
+    static wxDEPRECATED_INLINE( void SetTraceMask(wxTraceMask ulMask),
+        ms_ulTraceMask = ulMask; )
+
+    // this one can't be marked deprecated as it's used in our own wxLogger
+    // below but it still is deprecated and shouldn't be used
+    static wxTraceMask GetTraceMask() { return ms_ulTraceMask; }
+#endif // WXWIN_COMPATIBILITY_2_8

 
 protected:
 
 protected:

-    // the logging functions that can be overriden
+    // the logging functions that can be overridden: DoLogRecord() is called
+    // for every "record", i.e. a unit of log output, to be logged and by
+    // default formats the message and passes it to DoLogTextAtLevel() which in
+    // turn passes it to DoLogText() by default
+
+    // override this method if you want to change message formatting or do
+    // dynamic filtering
+    virtual void DoLogRecord(wxLogLevel level,
+                             const wxString& msg,
+                             const wxLogRecordInfo& info);
+
+    // override this method to redirect output to different channels depending
+    // on its level only; if even the level doesn't matter, override
+    // DoLogText() instead
+    virtual void DoLogTextAtLevel(wxLogLevel level, const wxString& msg);
+
+    // this function is not pure virtual as it might not be needed if you do
+    // the logging in overridden DoLogRecord() or DoLogTextAtLevel() directly
+    // but if you do not override them in your derived class you must override
+    // this one as the default implementation of it simply asserts
+    virtual void DoLogText(const wxString& msg);
+
+
+    // the rest of the functions are for backwards compatibility only, don't
+    // use them in new code; if you're updating your existing code you need to
+    // switch to overriding DoLogRecord/Text() above (although as long as these
+    // functions exist, log classes using them will continue to work)
+#if WXWIN_COMPATIBILITY_2_8
+    wxDEPRECATED_BUT_USED_INTERNALLY(
+        virtual void DoLog(wxLogLevel level, const char *szString, time_t t)
+    );
+
+    wxDEPRECATED_BUT_USED_INTERNALLY(
+        virtual void DoLog(wxLogLevel level, const wchar_t *wzString, time_t t)
+    );
+
+    // these shouldn't be used by new code
+    wxDEPRECATED_BUT_USED_INTERNALLY_INLINE(
+        virtual void DoLogString(const char *WXUNUSED(szString),
+                                 time_t WXUNUSED(t)),
+        wxEMPTY_PARAMETER_VALUE
+    )
+
+    wxDEPRECATED_BUT_USED_INTERNALLY_INLINE(
+        virtual void DoLogString(const wchar_t *WXUNUSED(wzString),
+                                 time_t WXUNUSED(t)),
+        wxEMPTY_PARAMETER_VALUE
+    )
+#endif // WXWIN_COMPATIBILITY_2_8
+
+
+    // log a message indicating the number of times the previous message was
+    // repeated if previous repetition counter is strictly positive, does
+    // nothing otherwise; return the old value of repetition counter
+    unsigned LogLastRepeatIfNeeded();

 
 

-    // default DoLog() prepends the time stamp and a prefix corresponding
-    // to the message to szString and then passes it to DoLogString()
-    virtual void DoLog(wxLogLevel level, const wxChar *szString, time_t t);
+private:
+#if wxUSE_THREADS
+    // called from FlushActive() to really log any buffered messages logged
+    // from the other threads
+    void FlushThreadMessages();
+
+    // these functions are called for non-main thread only by IsEnabled() and
+    // EnableLogging() respectively
+    static bool IsThreadLoggingEnabled();
+    static bool EnableThreadLogging(bool enable = true);
+#endif // wxUSE_THREADS
+
+    // get the active log target for the main thread, auto-creating it if
+    // necessary
+    //
+    // this is called from GetActiveTarget() and OnLog() when they're called
+    // from the main thread
+    static wxLog *GetMainThreadActiveTarget();

 
 

-    // default DoLogString does nothing but is not pure virtual because if
-    // you override DoLog() you might not need it at all
-    virtual void DoLogString(const wxChar *szString, time_t t);
+    // called from OnLog() if it's called from the main thread or if we have a
+    // (presumably MT-safe) thread-specific logger and by FlushThreadMessages()
+    // when it plays back the buffered messages logged from the other threads
+    void CallDoLogNow(wxLogLevel level,
+                      const wxString& msg,
+                      const wxLogRecordInfo& info);
+
+
+    // variables
+    // ----------------
+
+    wxLogFormatter    *m_formatter; // We own this pointer.

 
 

-    // log a line containing the number of times the previous message was
-    // repeated
-    // returns: the number
-    static unsigned DoLogNumberOfRepeats();

 
 

-private:

     // static variables
     // ----------------
 
     // static variables
     // ----------------
 

-    // traditional behaviour or counting repetitions
+    // if true, don't log the same message multiple times, only log it once
+    // with the number of times it was repeated

     static bool        ms_bRepetCounting;
     static bool        ms_bRepetCounting;

-    static wxString    ms_prevString;   // previous message that was logged
-    // how many times the previous message was logged
-    static unsigned    ms_prevCounter;
-    static time_t      ms_prevTimeStamp;// timestamp of the previous message
-    static wxLogLevel  ms_prevLevel;    // level of the previous message

 
     static wxLog      *ms_pLogger;      // currently active log sink
     static bool        ms_doLog;        // false => all logging disabled
 
     static wxLog      *ms_pLogger;      // currently active log sink
     static bool        ms_doLog;        // false => all logging disabled


@@ -284,19 +687,21 @@ private:
 
     static size_t      ms_suspendCount; // if positive, logs are not flushed
 
 
     static size_t      ms_suspendCount; // if positive, logs are not flushed
 

-    // format string for strftime(), if NULL, time stamping log messages is
+    // format string for strftime(), if empty, time stamping log messages is

     // disabled
     // disabled

-    static const wxChar *ms_timestamp;
+    static wxString    ms_timestamp;

 
 

+#if WXWIN_COMPATIBILITY_2_8

     static wxTraceMask ms_ulTraceMask;   // controls wxLogTrace behaviour
     static wxTraceMask ms_ulTraceMask;   // controls wxLogTrace behaviour

-    static wxArrayString ms_aTraceMasks; // more powerful filter for wxLogTrace
+#endif // WXWIN_COMPATIBILITY_2_8

 };
 
 // ----------------------------------------------------------------------------
 // "trivial" derivations of wxLog
 // ----------------------------------------------------------------------------
 
 };
 
 // ----------------------------------------------------------------------------
 // "trivial" derivations of wxLog
 // ----------------------------------------------------------------------------
 

-// log everything to a buffer
+// log everything except for the debug/trace messages (which are passed to
+// wxMessageOutputDebug) to a buffer

 class WXDLLIMPEXP_BASE wxLogBuffer : public wxLog
 {
 public:
 class WXDLLIMPEXP_BASE wxLogBuffer : public wxLog
 {
 public:


@@ -310,13 +715,12 @@ public:
     virtual void Flush();
 
 protected:
     virtual void Flush();
 
 protected:

-    virtual void DoLog(wxLogLevel level, const wxChar *szString, time_t t);
-    virtual void DoLogString(const wxChar *szString, time_t t);
+    virtual void DoLogTextAtLevel(wxLogLevel level, const wxString& msg);

 
 private:
     wxString m_str;
 
 
 private:
     wxString m_str;
 

-    DECLARE_NO_COPY_CLASS(wxLogBuffer)
+    wxDECLARE_NO_COPY_CLASS(wxLogBuffer);

 };
 
 
 };
 
 


@@ -325,15 +729,15 @@ class WXDLLIMPEXP_BASE wxLogStderr : public wxLog
 {
 public:
     // redirect log output to a FILE
 {
 public:
     // redirect log output to a FILE

-    wxLogStderr(FILE *fp = (FILE *) NULL);
+    wxLogStderr(FILE *fp = NULL);

 
 protected:
     // implement sink function
 
 protected:
     // implement sink function

-    virtual void DoLogString(const wxChar *szString, time_t t);
+    virtual void DoLogText(const wxString& msg);

 
     FILE *m_fp;
 
 
     FILE *m_fp;
 

-    DECLARE_NO_COPY_CLASS(wxLogStderr)
+    wxDECLARE_NO_COPY_CLASS(wxLogStderr);

 };
 
 #if wxUSE_STD_IOSTREAM
 };
 
 #if wxUSE_STD_IOSTREAM


@@ -347,7 +751,7 @@ public:
 
 protected:
     // implement sink function
 
 protected:
     // implement sink function

-    virtual void DoLogString(const wxChar *szString, time_t t);
+    virtual void DoLogText(const wxString& msg);

 
     // using ptr here to avoid including <iostream.h> from this file
     wxSTD ostream *m_ostr;
 
     // using ptr here to avoid including <iostream.h> from this file
     wxSTD ostream *m_ostr;


@@ -416,9 +820,14 @@ public:
     // override base class version to flush the old logger as well
     virtual void Flush();
 
     // override base class version to flush the old logger as well
     virtual void Flush();
 

+    // call to avoid destroying the old log target
+    void DetachOldLog() { m_logOld = NULL; }
+

 protected:
 protected:

-    // pass the chain to the old logger if needed
-    virtual void DoLog(wxLogLevel level, const wxChar *szString, time_t t);
+    // pass the record to the old logger if needed
+    virtual void DoLogRecord(wxLogLevel level,
+                             const wxString& msg,
+                             const wxLogRecordInfo& info);

 
 private:
     // the current log target
 
 private:
     // the current log target


@@ -430,17 +839,32 @@ private:
     // do we pass the messages to the old logger?
     bool m_bPassMessages;
 
     // do we pass the messages to the old logger?
     bool m_bPassMessages;
 

-    DECLARE_NO_COPY_CLASS(wxLogChain)
+    wxDECLARE_NO_COPY_CLASS(wxLogChain);

 };
 
 // a chain log target which uses itself as the new logger
 };
 
 // a chain log target which uses itself as the new logger

-class WXDLLIMPEXP_BASE wxLogPassThrough : public wxLogChain
+
+#define wxLogPassThrough wxLogInterposer
+
+class WXDLLIMPEXP_BASE wxLogInterposer : public wxLogChain

 {
 public:
 {
 public:

-    wxLogPassThrough();
+    wxLogInterposer();

 
 private:
 
 private:

-    DECLARE_NO_COPY_CLASS(wxLogPassThrough)
+    wxDECLARE_NO_COPY_CLASS(wxLogInterposer);
+};
+
+// a temporary interposer which doesn't destroy the old log target
+// (calls DetachOldLog)
+
+class WXDLLIMPEXP_BASE wxLogInterposerTemp : public wxLogChain
+{
+public:
+    wxLogInterposerTemp();
+
+private:
+    wxDECLARE_NO_COPY_CLASS(wxLogInterposerTemp);

 };
 
 #if wxUSE_GUI
 };
 
 #if wxUSE_GUI


@@ -448,15 +872,404 @@ private:
     #include "wx/generic/logg.h"
 #endif // wxUSE_GUI
 
     #include "wx/generic/logg.h"
 #endif // wxUSE_GUI
 

+// ----------------------------------------------------------------------------
+// wxLogger
+// ----------------------------------------------------------------------------
+
+// wxLogger is a helper class used by wxLogXXX() functions implementation,
+// don't use it directly as it's experimental and subject to change (OTOH it
+// might become public in the future if it's deemed to be useful enough)
+
+// contains information about the context from which a log message originates
+// and provides Log() vararg method which forwards to wxLog::OnLog() and passes
+// this context to it
+class wxLogger
+{
+public:
+    // ctor takes the basic information about the log record
+    wxLogger(wxLogLevel level,
+             const char *filename,
+             int line,
+             const char *func,
+             const char *component)
+        : m_level(level),
+          m_info(filename, line, func, component)
+    {
+    }
+
+    // store extra data in our log record and return this object itself (so
+    // that further calls to its functions could be chained)
+    template <typename T>
+    wxLogger& Store(const wxString& key, T val)
+    {
+        m_info.StoreValue(key, val);
+        return *this;
+    }
+
+    // hack for "overloaded" wxLogXXX() functions: calling this method
+    // indicates that we may have an extra first argument preceding the format
+    // string and that if we do have it, we should store it in m_info using the
+    // given key (while by default 0 value will be used)
+    wxLogger& MaybeStore(const wxString& key, wxUIntPtr value = 0)
+    {
+        wxASSERT_MSG( m_optKey.empty(), "can only have one optional value" );
+        m_optKey = key;
+
+        m_info.StoreValue(key, value);
+        return *this;
+    }
+
+
+    // non-vararg function used by wxVLogXXX():
+
+    // log the message at the level specified in the ctor if this log message
+    // is enabled
+    void LogV(const wxString& format, va_list argptr)
+    {
+        // remember that fatal errors can't be disabled
+        if ( m_level == wxLOG_FatalError ||
+                wxLog::IsLevelEnabled(m_level, m_info.component) )
+            DoCallOnLog(format, argptr);
+    }
+
+    // overloads used by functions with optional leading arguments (whose
+    // values are stored in the key passed to MaybeStore())
+    void LogV(long num, const wxString& format, va_list argptr)
+    {
+        Store(m_optKey, num);
+
+        LogV(format, argptr);
+    }
+
+    void LogV(void *ptr, const wxString& format, va_list argptr)
+    {
+        Store(m_optKey, wxPtrToUInt(ptr));
+
+        LogV(format, argptr);
+    }
+
+    void LogVTrace(const wxString& mask, const wxString& format, va_list argptr)
+    {
+        if ( !wxLog::IsAllowedTraceMask(mask) )
+            return;
+
+        Store(wxLOG_KEY_TRACE_MASK, mask);
+
+        LogV(format, argptr);
+    }
+
+
+    // vararg functions used by wxLogXXX():
+
+    // will log the message at the level specified in the ctor
+    //
+    // notice that this function supposes that the caller already checked that
+    // the level was enabled and does no checks itself
+    WX_DEFINE_VARARG_FUNC_VOID
+    (
+        Log,
+        1, (const wxFormatString&),
+        DoLog, DoLogUtf8
+    )
+
+    // same as Log() but with an extra numeric or pointer parameters: this is
+    // used to pass an optional value by storing it in m_info under the name
+    // passed to MaybeStore() and is required to support "overloaded" versions
+    // of wxLogStatus() and wxLogSysError()
+    WX_DEFINE_VARARG_FUNC_VOID
+    (
+        Log,
+        2, (long, const wxFormatString&),
+        DoLogWithNum, DoLogWithNumUtf8
+    )
+
+    // unfortunately we can't use "void *" here as we get overload ambiguities
+    // with Log(wxFormatString, ...) when the first argument is a "char *" or
+    // "wchar_t *" then -- so we only allow passing wxObject here, which is
+    // ugly but fine in practice as this overload is only used by wxLogStatus()
+    // whose first argument is a wxFrame
+    WX_DEFINE_VARARG_FUNC_VOID
+    (
+        Log,
+        2, (wxObject *, const wxFormatString&),
+        DoLogWithPtr, DoLogWithPtrUtf8
+    )
+
+    // log the message at the level specified as its first argument
+    //
+    // as the macros don't have access to the level argument in this case, this
+    // function does check that the level is enabled itself
+    WX_DEFINE_VARARG_FUNC_VOID
+    (
+        LogAtLevel,
+        2, (wxLogLevel, const wxFormatString&),
+        DoLogAtLevel, DoLogAtLevelUtf8
+    )
+
+    // special versions for wxLogTrace() which is passed either string or
+    // integer mask as first argument determining whether the message should be
+    // logged or not
+    WX_DEFINE_VARARG_FUNC_VOID
+    (
+        LogTrace,
+        2, (const wxString&, const wxFormatString&),
+        DoLogTrace, DoLogTraceUtf8
+    )
+
+#if WXWIN_COMPATIBILITY_2_8
+    WX_DEFINE_VARARG_FUNC_VOID
+    (
+        LogTrace,
+        2, (wxTraceMask, const wxFormatString&),
+        DoLogTraceMask, DoLogTraceMaskUtf8
+    )
+#endif // WXWIN_COMPATIBILITY_2_8
+
+#ifdef __WATCOMC__
+    // workaround for http://bugzilla.openwatcom.org/show_bug.cgi?id=351
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               1, (const wxString&),
+                               (wxFormatString(f1)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               1, (const wxCStrData&),
+                               (wxFormatString(f1)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               1, (const char*),
+                               (wxFormatString(f1)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               1, (const wchar_t*),
+                               (wxFormatString(f1)))
+
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               2, (long, const wxString&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               2, (long, const wxCStrData&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               2, (long, const char *),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               2, (long, const wchar_t *),
+                               (f1, wxFormatString(f2)))
+
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               2, (wxObject *, const wxString&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               2, (wxObject *, const wxCStrData&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               2, (wxObject *, const char *),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, Log,
+                               2, (wxObject *, const wchar_t *),
+                               (f1, wxFormatString(f2)))
+
+    WX_VARARG_WATCOM_WORKAROUND(void, LogAtLevel,
+                               2, (wxLogLevel, const wxString&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogAtLevel,
+                               2, (wxLogLevel, const wxCStrData&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogAtLevel,
+                               2, (wxLogLevel, const char *),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogAtLevel,
+                               2, (wxLogLevel, const wchar_t *),
+                               (f1, wxFormatString(f2)))
+
+    WX_VARARG_WATCOM_WORKAROUND(void, LogTrace,
+                               2, (const wxString&, const wxString&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogTrace,
+                               2, (const wxString&, const wxCStrData&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogTrace,
+                               2, (const wxString&, const char *),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogTrace,
+                               2, (const wxString&, const wchar_t *),
+                               (f1, wxFormatString(f2)))
+
+#if WXWIN_COMPATIBILITY_2_8
+    WX_VARARG_WATCOM_WORKAROUND(void, LogTrace,
+                               2, (wxTraceMask, wxTraceMask),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogTrace,
+                               2, (wxTraceMask, const wxCStrData&),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogTrace,
+                               2, (wxTraceMask, const char *),
+                               (f1, wxFormatString(f2)))
+    WX_VARARG_WATCOM_WORKAROUND(void, LogTrace,
+                               2, (wxTraceMask, const wchar_t *),
+                               (f1, wxFormatString(f2)))
+#endif // WXWIN_COMPATIBILITY_2_8
+#endif // __WATCOMC__
+
+private:
+#if !wxUSE_UTF8_LOCALE_ONLY
+    void DoLog(const wxChar *format, ...)
+    {
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+
+    void DoLogWithNum(long num, const wxChar *format, ...)
+    {
+        Store(m_optKey, num);
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+
+    void DoLogWithPtr(void *ptr, const wxChar *format, ...)
+    {
+        Store(m_optKey, wxPtrToUInt(ptr));
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+
+    void DoLogAtLevel(wxLogLevel level, const wxChar *format, ...)
+    {
+        if ( !wxLog::IsLevelEnabled(level, m_info.component) )
+            return;
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(level, format, argptr);
+        va_end(argptr);
+    }
+
+    void DoLogTrace(const wxString& mask, const wxChar *format, ...)
+    {
+        if ( !wxLog::IsAllowedTraceMask(mask) )
+            return;
+
+        Store(wxLOG_KEY_TRACE_MASK, mask);
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+
+#if WXWIN_COMPATIBILITY_2_8
+    void DoLogTraceMask(wxTraceMask mask, const wxChar *format, ...)
+    {
+        if ( (wxLog::GetTraceMask() & mask) != mask )
+            return;
+
+        Store(wxLOG_KEY_TRACE_MASK, mask);
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+#endif // WXWIN_COMPATIBILITY_2_8
+#endif // !wxUSE_UTF8_LOCALE_ONLY
+
+#if wxUSE_UNICODE_UTF8
+    void DoLogUtf8(const char *format, ...)
+    {
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+
+    void DoLogWithNumUtf8(long num, const char *format, ...)
+    {
+        Store(m_optKey, num);
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+
+    void DoLogWithPtrUtf8(void *ptr, const char *format, ...)
+    {
+        Store(m_optKey, wxPtrToUInt(ptr));
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+
+    void DoLogAtLevelUtf8(wxLogLevel level, const char *format, ...)
+    {
+        if ( !wxLog::IsLevelEnabled(level, m_info.component) )
+            return;
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(level, format, argptr);
+        va_end(argptr);
+    }
+
+    void DoLogTraceUtf8(const wxString& mask, const char *format, ...)
+    {
+        if ( !wxLog::IsAllowedTraceMask(mask) )
+            return;
+
+        Store(wxLOG_KEY_TRACE_MASK, mask);
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+
+#if WXWIN_COMPATIBILITY_2_8
+    void DoLogTraceMaskUtf8(wxTraceMask mask, const char *format, ...)
+    {
+        if ( (wxLog::GetTraceMask() & mask) != mask )
+            return;
+
+        Store(wxLOG_KEY_TRACE_MASK, mask);
+
+        va_list argptr;
+        va_start(argptr, format);
+        DoCallOnLog(format, argptr);
+        va_end(argptr);
+    }
+#endif // WXWIN_COMPATIBILITY_2_8
+#endif // wxUSE_UNICODE_UTF8
+
+    void DoCallOnLog(wxLogLevel level, const wxString& format, va_list argptr)
+    {
+        wxLog::OnLog(level, wxString::FormatV(format, argptr), m_info);
+    }
+
+    void DoCallOnLog(const wxString& format, va_list argptr)
+    {
+        DoCallOnLog(m_level, format, argptr);
+    }
+
+
+    const wxLogLevel m_level;
+    wxLogRecordInfo m_info;
+
+    wxString m_optKey;
+
+    wxDECLARE_NO_COPY_CLASS(wxLogger);
+};
+

 // ============================================================================
 // global functions
 // ============================================================================
 
 // ============================================================================
 // global functions
 // ============================================================================
 

-// ----------------------------------------------------------------------------
-// Log functions should be used by application instead of stdio, iostream &c
-// for log messages for easy redirection
-// ----------------------------------------------------------------------------
-

 // ----------------------------------------------------------------------------
 // get error code/error message from system in a portable way
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // get error code/error message from system in a portable way
 // ----------------------------------------------------------------------------


@@ -468,43 +1281,223 @@ WXDLLIMPEXP_BASE unsigned long wxSysErrorCode();
 WXDLLIMPEXP_BASE const wxChar* wxSysErrorMsg(unsigned long nErrCode = 0);
 
 // ----------------------------------------------------------------------------
 WXDLLIMPEXP_BASE const wxChar* wxSysErrorMsg(unsigned long nErrCode = 0);
 
 // ----------------------------------------------------------------------------

-// define wxLog<level>
+// define wxLog<level>() functions which can be used by application instead of
+// stdio, iostream &c for log messages for easy redirection

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-#define DECLARE_LOG_FUNCTION_PUBLIC(level)                                  \
-    /* void wxLog##level(const wxChar *szFormat, ...); */                   \
-    WX_DEFINE_VARARG_FUNC_VOID(wxLog##level, wxDoLog##level)
+/*
+    The code below is unreadable because it (unfortunately unavoidably)
+    contains a lot of macro magic but all it does is to define wxLogXXX() such
+    that you can call them as vararg functions to log a message at the
+    corresponding level.
+
+    More precisely, it defines:
+
+        - wxLog{FatalError,Error,Warning,Message,Verbose,Debug}() functions
+        taking the format string and additional vararg arguments if needed.
+        - wxLogGeneric(wxLogLevel level, const wxString& format, ...) which
+        takes the log level explicitly.
+        - wxLogSysError(const wxString& format, ...) and wxLogSysError(long
+        err, const wxString& format, ...) which log a wxLOG_Error severity
+        message with the error message corresponding to the system error code
+        err or the last error.
+        - wxLogStatus(const wxString& format, ...) which logs the message into
+        the status bar of the main application window and its overload
+        wxLogStatus(wxFrame *frame, const wxString& format, ...) which logs it
+        into the status bar of the specified frame.
+        - wxLogTrace(Mask mask, const wxString& format, ...) which only logs
+        the message is the specified mask is enabled. This comes in two kinds:
+        Mask can be a wxString or a long. Both are deprecated.
+
+    In addition, wxVLogXXX() versions of all the functions above are also
+    defined. They take a va_list argument instead of "...".
+ */
+
+// creates wxLogger object for the current location
+#define wxMAKE_LOGGER(level) \
+    wxLogger(wxLOG_##level, __FILE__, __LINE__, __WXFUNCTION__, wxLOG_COMPONENT)

 
 

-#define DECLARE_LOG_FUNCTION_IMPL(level)                                    \
-    extern void WXDLLIMPEXP_BASE wxVLog##level(const wxChar *szFormat,      \
-                                               va_list argptr);             \
-    extern void WXDLLIMPEXP_BASE wxDoLog##level(const wxChar *szFormat,     \
-                                                ...) ATTRIBUTE_PRINTF_1
+// this macro generates the expression which logs whatever follows it in
+// parentheses at the level specified as argument
+#define wxDO_LOG(level) wxMAKE_LOGGER(level).Log
+
+// this is the non-vararg equivalent
+#define wxDO_LOGV(level, format, argptr) \
+    wxMAKE_LOGGER(level).LogV(format, argptr)
+
+// this macro declares wxLog<level>() macro which logs whatever follows it if
+// logging at specified level is enabled (notice that if it is false, the
+// following arguments are not even evaluated which is good as it avoids
+// unnecessary overhead)
+//
+// Note: the strange if/else construct is needed to make the following code
+//
+//          if ( cond )
+//              wxLogError("!!!");
+//          else
+//              ...
+//
+//       work as expected, without it the second "else" would match the "if"
+//       inside wxLogError(). Unfortunately code like
+//
+//          if ( cond )
+//              wxLogError("!!!");
+//
+//       now provokes "suggest explicit braces to avoid ambiguous 'else'"
+//       warnings from g++ 4.3 and later with -Wparentheses on but they can be
+//       easily fixed by adding curly braces around wxLogError() and at least
+//       the code still does do the right thing.
+#define wxDO_LOG_IF_ENABLED(level)                                            \
+    if ( !wxLog::IsLevelEnabled(wxLOG_##level, wxLOG_COMPONENT) )             \
+    {}                                                                        \
+    else                                                                      \
+        wxDO_LOG(level)
+
+// wxLogFatalError() is special as it can't be disabled
+#define wxLogFatalError wxDO_LOG(FatalError)
+#define wxVLogFatalError(format, argptr) wxDO_LOGV(FatalError, format, argptr)
+
+#define wxLogError wxDO_LOG_IF_ENABLED(Error)
+#define wxVLogError(format, argptr) wxDO_LOGV(Error, format, argptr)
+
+#define wxLogWarning wxDO_LOG_IF_ENABLED(Warning)
+#define wxVLogWarning(format, argptr) wxDO_LOGV(Warning, format, argptr)
+
+#define wxLogMessage wxDO_LOG_IF_ENABLED(Message)
+#define wxVLogMessage(format, argptr) wxDO_LOGV(Message, format, argptr)
+
+// this one is special as it only logs if we're in verbose mode
+#define wxLogVerbose                                                          \
+    if ( !(wxLog::IsLevelEnabled(wxLOG_Info, wxLOG_COMPONENT) &&              \
+            wxLog::GetVerbose()) )                                            \
+    {}                                                                        \
+    else                                                                      \
+        wxDO_LOG(Info)
+#define wxVLogVerbose(format, argptr)                                         \
+    if ( !(wxLog::IsLevelEnabled(wxLOG_Info, wxLOG_COMPONENT) &&              \
+            wxLog::GetVerbose()) )                                            \
+    {}                                                                        \
+    else                                                                      \
+        wxDO_LOGV(Info, format, argptr)
+
+// deprecated synonyms for wxLogVerbose() and wxVLogVerbose()
+#define wxLogInfo wxLogVerbose
+#define wxVLogInfo wxVLogVerbose
+
+
+// another special case: the level is passed as first argument of the function
+// and so is not available to the macro
+//
+// notice that because of this, arguments of wxLogGeneric() are currently
+// always evaluated, unlike for the other log functions
+#define wxLogGeneric wxMAKE_LOGGER(Max).LogAtLevel
+#define wxVLogGeneric(level, format, argptr) \
+    if ( !wxLog::IsLevelEnabled(wxLOG_##level, wxLOG_COMPONENT) )             \
+    {}                                                                        \
+    else                                                                      \
+        wxDO_LOGV(level, format, argptr)
+
+
+// wxLogSysError() needs to stash the error code value in the log record info
+// so it needs special handling too; additional complications arise because the
+// error code may or not be present as the first argument
+//
+// notice that we unfortunately can't avoid the call to wxSysErrorCode() even
+// though it may be unneeded if an explicit error code is passed to us because
+// the message might not be logged immediately (e.g. it could be queued for
+// logging from the main thread later) and so we can't to wait until it is
+// logged to determine whether we have last error or not as it will be too late
+// and it will have changed already by then (in fact it even changes when
+// wxString::Format() is called because of vsnprintf() inside it so it can
+// change even much sooner)
+#define wxLOG_KEY_SYS_ERROR_CODE "wx.sys_error"
+
+#define wxLogSysError                                                         \
+    if ( !wxLog::IsLevelEnabled(wxLOG_Error, wxLOG_COMPONENT) )               \
+    {}                                                                        \
+    else                                                                      \
+        wxMAKE_LOGGER(Error).MaybeStore(wxLOG_KEY_SYS_ERROR_CODE,             \
+                                        wxSysErrorCode()).Log
+
+// unfortunately we can't have overloaded macros so we can't define versions
+// both with and without error code argument and have to rely on LogV()
+// overloads in wxLogger to select between them
+#define wxVLogSysError \
+    wxMAKE_LOGGER(Error).MaybeStore(wxLOG_KEY_SYS_ERROR_CODE, \
+                                    wxSysErrorCode()).LogV
+
+#if wxUSE_GUI
+    // wxLogStatus() is similar to wxLogSysError() as it allows to optionally
+    // specify the frame to which the message should go
+    #define wxLOG_KEY_FRAME "wx.frame"
+
+    #define wxLogStatus                                                       \
+        if ( !wxLog::IsLevelEnabled(wxLOG_Status, wxLOG_COMPONENT) )          \
+        {}                                                                    \
+        else                                                                  \
+            wxMAKE_LOGGER(Status).MaybeStore(wxLOG_KEY_FRAME).Log
+
+    #define wxVLogStatus \
+        wxMAKE_LOGGER(Status).MaybeStore(wxLOG_KEY_FRAME).LogV
+#endif // wxUSE_GUI

 
 

-#define DECLARE_LOG_FUNCTION2_EXP_IMPL(level, argclass, arg, expdecl)       \
-    extern void expdecl wxVLog##level(argclass arg,                         \
-                                      const wxChar *szFormat,               \
-                                      va_list argptr);                      \
-    extern void expdecl wxDoLog##level(argclass arg,                        \
-                                       const wxChar *szFormat,              \
-                                       ...) ATTRIBUTE_PRINTF_2

 
 #else // !wxUSE_LOG
 
 
 #else // !wxUSE_LOG
 

-// log functions do nothing at all
-#define DECLARE_LOG_FUNCTION_PUBLIC(level)                                  \
-    /* void wxLog##level(const wxChar *szFormat, ...) {} */                 \
-    WX_DEFINE_VARARG_FUNC_NOP(wxLog##level)
+#undef wxUSE_LOG_DEBUG
+#define wxUSE_LOG_DEBUG 0
+
+#undef wxUSE_LOG_TRACE
+#define wxUSE_LOG_TRACE 0

 
 

-#define DECLARE_LOG_FUNCTION_IMPL(level)                                    \
-    inline void wxVLog##level(const wxChar *WXUNUSED(szFormat),             \
+#if defined(__WATCOMC__) || defined(__MINGW32__)
+    // Mingw has similar problem with wxLogSysError:
+    #define WX_WATCOM_OR_MINGW_ONLY_CODE( x )  x
+#else
+    #define WX_WATCOM_OR_MINGW_ONLY_CODE( x )
+#endif
+
+// define macros for defining log functions which do nothing at all
+//
+// WX_WATCOM_ONLY_CODE is needed to work around
+// http://bugzilla.openwatcom.org/show_bug.cgi?id=351
+#define wxDEFINE_EMPTY_LOG_FUNCTION(level)                                  \
+    WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 1, (const wxFormatString&))     \
+    WX_WATCOM_ONLY_CODE(                                                    \
+        WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 1, (const char*))           \
+        WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 1, (const wchar_t*))        \
+        WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 1, (const wxCStrData&))     \
+    )                                                                       \
+    inline void wxVLog##level(const wxFormatString& WXUNUSED(format),       \

                               va_list WXUNUSED(argptr)) { }                 \
 
                               va_list WXUNUSED(argptr)) { }                 \
 

-#define DECLARE_LOG_FUNCTION2_EXP_IMPL(level, argclass, arg, expdecl)       \
+#define wxDEFINE_EMPTY_LOG_FUNCTION2(level, argclass)                       \
+    WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 2, (argclass, const wxFormatString&)) \
+    WX_WATCOM_OR_MINGW_ONLY_CODE(                                           \
+        WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 2, (argclass, const char*)) \
+        WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 2, (argclass, const wchar_t*)) \
+        WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 2, (argclass, const wxCStrData&)) \
+    )                                                                       \

     inline void wxVLog##level(argclass WXUNUSED(arg),                       \
     inline void wxVLog##level(argclass WXUNUSED(arg),                       \

-                              const wxChar *WXUNUSED(szFormat),             \
+                              const wxFormatString& WXUNUSED(format),       \

                               va_list WXUNUSED(argptr)) {}
 
                               va_list WXUNUSED(argptr)) {}
 

+wxDEFINE_EMPTY_LOG_FUNCTION(FatalError);
+wxDEFINE_EMPTY_LOG_FUNCTION(Error);
+wxDEFINE_EMPTY_LOG_FUNCTION(SysError);
+wxDEFINE_EMPTY_LOG_FUNCTION2(SysError, long);
+wxDEFINE_EMPTY_LOG_FUNCTION(Warning);
+wxDEFINE_EMPTY_LOG_FUNCTION(Message);
+wxDEFINE_EMPTY_LOG_FUNCTION(Info);
+wxDEFINE_EMPTY_LOG_FUNCTION(Verbose);
+
+wxDEFINE_EMPTY_LOG_FUNCTION2(Generic, wxLogLevel);
+
+#if wxUSE_GUI
+    wxDEFINE_EMPTY_LOG_FUNCTION(Status);
+    wxDEFINE_EMPTY_LOG_FUNCTION2(Status, wxFrame *);
+#endif // wxUSE_GUI
+

 // Empty Class to fake wxLogNull
 class WXDLLIMPEXP_BASE wxLogNull
 {
 // Empty Class to fake wxLogNull
 class WXDLLIMPEXP_BASE wxLogNull
 {


@@ -521,104 +1514,70 @@ public:
 
 #endif // wxUSE_LOG/!wxUSE_LOG
 
 
 #endif // wxUSE_LOG/!wxUSE_LOG
 

-#define DECLARE_LOG_FUNCTION(level)                                         \
-    DECLARE_LOG_FUNCTION_PUBLIC(level)                                      \
-    DECLARE_LOG_FUNCTION_IMPL(level)

 
 

-#define DECLARE_LOG_FUNCTION2_EXP(level, argclass, arg, expdecl)            \
-    DECLARE_LOG_FUNCTION_PUBLIC(level)                                      \
-    DECLARE_LOG_FUNCTION2_EXP_IMPL(level, argclass, arg, expdecl)
+// debug functions can be completely disabled in optimized builds

 
 

-#define DECLARE_LOG_FUNCTION2_EXP(level, argclass, arg, expdecl)            \
-    DECLARE_LOG_FUNCTION_PUBLIC(level)                                      \
-    DECLARE_LOG_FUNCTION2_EXP_IMPL(level, argclass, arg, expdecl)
-
-#define DECLARE_LOG_FUNCTION2_IMPL(level, argclass, arg)                    \
-    DECLARE_LOG_FUNCTION2_EXP_IMPL(level, argclass, arg, WXDLLIMPEXP_BASE)
-
-#define DECLARE_LOG_FUNCTION2(level, argclass, arg)                         \
-    DECLARE_LOG_FUNCTION2_EXP(level, argclass, arg, WXDLLIMPEXP_BASE)
-
-
-// a generic function for all levels (level is passes as parameter)
-DECLARE_LOG_FUNCTION2(Generic, wxLogLevel, level);
-
-// one function per each level
-DECLARE_LOG_FUNCTION(FatalError);
-DECLARE_LOG_FUNCTION(Error);
-DECLARE_LOG_FUNCTION(Warning);
-DECLARE_LOG_FUNCTION(Message);
-DECLARE_LOG_FUNCTION(Info);
-DECLARE_LOG_FUNCTION(Verbose);
-
-// this function sends the log message to the status line of the top level
-// application frame, if any
-DECLARE_LOG_FUNCTION_IMPL(Status);
-
-#if wxUSE_GUI
-    // this one is the same as previous except that it allows to explicitly
-    class WXDLLEXPORT wxFrame;
-    // specify the frame to which the output should go
-    DECLARE_LOG_FUNCTION2_EXP_IMPL(Status, wxFrame *, pFrame, WXDLLIMPEXP_CORE);
-#endif // wxUSE_GUI
-
-DECLARE_LOG_FUNCTION_PUBLIC(Status);
-
-// additional one: as wxLogError, but also logs last system call error code
-// and the corresponding error message if available
-DECLARE_LOG_FUNCTION_IMPL(SysError);
-
-// and another one which also takes the error code (for those broken APIs
-// that don't set the errno (like registry APIs in Win32))
-DECLARE_LOG_FUNCTION2_IMPL(SysError, long, lErrCode);
-
-DECLARE_LOG_FUNCTION_PUBLIC(SysError);
-
-// debug functions do nothing in release mode
-#if wxUSE_LOG && wxUSE_LOG_DEBUG
-    DECLARE_LOG_FUNCTION(Debug);
-
-    // there is no more unconditional LogTrace: it is not different from
-    // LogDebug and it creates overload ambiguities
-    //DECLARE_LOG_FUNCTION(Trace);
-
-    // this version only logs the message if the mask had been added to the
-    // list of masks with AddTraceMask()
-    DECLARE_LOG_FUNCTION2_IMPL(Trace, const wxChar*, mask);
-    // and this one does nothing if all of level bits are not set in
-    // wxLog::GetActive()->GetTraceMask() -- it's deprecated in favour of
-    // string identifiers
-    DECLARE_LOG_FUNCTION2_IMPL(Trace, wxTraceMask, mask);
-    DECLARE_LOG_FUNCTION_PUBLIC(Trace);
-#else   //!debug || !wxUSE_LOG
-    // these functions do nothing in release builds, but don't define them as
-    // nothing as it could result in different code structure in debug and
-    // release and this could result in trouble when these macros are used
-    // inside if/else
-    //
-    // note that making wxVLogDebug/Trace() themselves (empty inline) functions
-    // is a bad idea as some compilers are stupid enough to not inline even
-    // empty functions if their parameters are complicated enough, but by
-    // defining them as an empty inline function we ensure that even dumbest
-    // compilers optimise them away
+// if these log functions are disabled, we prefer to define them as (empty)
+// variadic macros as this completely removes them and their argument
+// evaluation from the object code but if this is not supported by compiler we
+// use empty inline functions instead (defining them as nothing would result in
+// compiler warnings)
+//
+// note that making wxVLogDebug/Trace() themselves (empty inline) functions is
+// a bad idea as some compilers are stupid enough to not inline even empty
+// functions if their parameters are complicated enough, but by defining them
+// as an empty inline function we ensure that even dumbest compilers optimise
+// them away
+#ifdef __BORLANDC__
+    // but Borland gives "W8019: Code has no effect" for wxLogNop() so we need
+    // to define it differently for it to avoid these warnings (same problem as
+    // with wxUnusedVar())
+    #define wxLogNop() { }
+#else

     inline void wxLogNop() { }
     inline void wxLogNop() { }

+#endif

 
 

+#if wxUSE_LOG_DEBUG
+    #define wxLogDebug wxDO_LOG_IF_ENABLED(Debug)
+    #define wxVLogDebug(format, argptr) wxDO_LOGV(Debug, format, argptr)
+#else // !wxUSE_LOG_DEBUG

     #define wxVLogDebug(fmt, valist) wxLogNop()
     #define wxVLogDebug(fmt, valist) wxLogNop()

-    #define wxVLogTrace(mask, fmt, valist) wxLogNop()

 
     #ifdef HAVE_VARIADIC_MACROS
 
     #ifdef HAVE_VARIADIC_MACROS

-        // unlike the inline functions below, this completely removes the
-        // wxLogXXX calls from the object file:

         #define wxLogDebug(fmt, ...) wxLogNop()
         #define wxLogDebug(fmt, ...) wxLogNop()

+    #else // !HAVE_VARIADIC_MACROS
+        WX_DEFINE_VARARG_FUNC_NOP(wxLogDebug, 1, (const wxFormatString&))
+    #endif
+#endif // wxUSE_LOG_DEBUG/!wxUSE_LOG_DEBUG
+
+#if wxUSE_LOG_TRACE
+    #define wxLogTrace                                                        \
+        if ( !wxLog::IsLevelEnabled(wxLOG_Trace, wxLOG_COMPONENT) )           \
+        {}                                                                    \
+        else                                                                  \
+            wxMAKE_LOGGER(Trace).LogTrace
+    #define wxVLogTrace                                                       \
+        if ( !wxLog::IsLevelEnabled(wxLOG_Trace, wxLOG_COMPONENT) )           \
+        {}                                                                    \
+        else                                                                  \
+            wxMAKE_LOGGER(Trace).LogVTrace
+#else  // !wxUSE_LOG_TRACE
+    #define wxVLogTrace(mask, fmt, valist) wxLogNop()
+
+    #ifdef HAVE_VARIADIC_MACROS

         #define wxLogTrace(mask, fmt, ...) wxLogNop()
     #else // !HAVE_VARIADIC_MACROS
         #define wxLogTrace(mask, fmt, ...) wxLogNop()
     #else // !HAVE_VARIADIC_MACROS

-        //inline void wxLogDebug(const wxString& fmt, ...) {}
-        WX_DEFINE_VARARG_FUNC_NOP(wxLogDebug, wxLogNopVararg)
-        //inline void wxLogTrace(wxTraceMask, const wxString& fmt, ...) {}
-        //inline void wxLogTrace(const wxString&, const wxString& fmt, ...) {}
-        WX_DEFINE_VARARG_FUNC_NOP(wxLogTrace, wxLogNopVararg)
+        #if WXWIN_COMPATIBILITY_2_8
+        WX_DEFINE_VARARG_FUNC_NOP(wxLogTrace, 2, (wxTraceMask, const wxFormatString&))
+        #endif
+        WX_DEFINE_VARARG_FUNC_NOP(wxLogTrace, 2, (const wxString&, const wxFormatString&))
+        #ifdef __WATCOMC__
+        // workaround for http://bugzilla.openwatcom.org/show_bug.cgi?id=351
+        WX_DEFINE_VARARG_FUNC_NOP(wxLogTrace, 2, (const char*, const char*))
+        WX_DEFINE_VARARG_FUNC_NOP(wxLogTrace, 2, (const wchar_t*, const wchar_t*))
+        #endif

     #endif // HAVE_VARIADIC_MACROS/!HAVE_VARIADIC_MACROS
     #endif // HAVE_VARIADIC_MACROS/!HAVE_VARIADIC_MACROS

-#endif // debug/!debug
+#endif // wxUSE_LOG_TRACE/!wxUSE_LOG_TRACE

 
 // wxLogFatalError helper: show the (fatal) error to the user in a safe way,
 // i.e. without using wxMessageBox() for example because it could crash
 
 // wxLogFatalError helper: show the (fatal) error to the user in a safe way,
 // i.e. without using wxMessageBox() for example because it could crash


@@ -629,33 +1588,46 @@ wxSafeShowMessage(const wxString& title, const wxString& text);
 // debug only logging functions: use them with API name and error code
 // ----------------------------------------------------------------------------
 
 // debug only logging functions: use them with API name and error code
 // ----------------------------------------------------------------------------
 

-#ifdef __WXDEBUG__
+#if wxUSE_LOG_DEBUG

     // make life easier for people using VC++ IDE: clicking on the message
     // will take us immediately to the place of the failed API
 #ifdef __VISUALC__
     #define wxLogApiError(api, rc)                                            \
         wxLogDebug(wxT("%s(%d): '%s' failed with error 0x%08lx (%s)."),       \
     // make life easier for people using VC++ IDE: clicking on the message
     // will take us immediately to the place of the failed API
 #ifdef __VISUALC__
     #define wxLogApiError(api, rc)                                            \
         wxLogDebug(wxT("%s(%d): '%s' failed with error 0x%08lx (%s)."),       \

-                   __TFILE__, __LINE__, api,                                  \
+                   __FILE__, __LINE__, api,                                   \

                    (long)rc, wxSysErrorMsg(rc))
 #else // !VC++
     #define wxLogApiError(api, rc)                                            \
         wxLogDebug(wxT("In file %s at line %d: '%s' failed with ")            \
                    wxT("error 0x%08lx (%s)."),                                \
                    (long)rc, wxSysErrorMsg(rc))
 #else // !VC++
     #define wxLogApiError(api, rc)                                            \
         wxLogDebug(wxT("In file %s at line %d: '%s' failed with ")            \
                    wxT("error 0x%08lx (%s)."),                                \

-                   __TFILE__, __LINE__, api,                                  \
+                   __FILE__, __LINE__, api,                                   \

                    (long)rc, wxSysErrorMsg(rc))
 #endif // VC++/!VC++
 
     #define wxLogLastError(api) wxLogApiError(api, wxSysErrorCode())
 
                    (long)rc, wxSysErrorMsg(rc))
 #endif // VC++/!VC++
 
     #define wxLogLastError(api) wxLogApiError(api, wxSysErrorCode())
 

-#else   //!debug
+#else // !wxUSE_LOG_DEBUG

     #define wxLogApiError(api, err) wxLogNop()
     #define wxLogLastError(api) wxLogNop()
     #define wxLogApiError(api, err) wxLogNop()
     #define wxLogLastError(api) wxLogNop()

-#endif  //debug/!debug
+#endif // wxUSE_LOG_DEBUG/!wxUSE_LOG_DEBUG

 
 // wxCocoa has additiional trace masks
 #if defined(__WXCOCOA__)
 #include "wx/cocoa/log.h"
 #endif
 
 
 // wxCocoa has additiional trace masks
 #if defined(__WXCOCOA__)
 #include "wx/cocoa/log.h"
 #endif
 

+#ifdef WX_WATCOM_ONLY_CODE
+    #undef WX_WATCOM_ONLY_CODE
+#endif
+
+// macro which disables debug logging in release builds: this is done by
+// default by wxIMPLEMENT_APP() so usually it doesn't need to be used explicitly
+#if defined(NDEBUG) && wxUSE_LOG_DEBUG
+    #define wxDISABLE_DEBUG_LOGGING_IN_RELEASE_BUILD() \
+        wxLog::SetLogLevel(wxLOG_Info)
+#else // !NDEBUG
+    #define wxDISABLE_DEBUG_LOGGING_IN_RELEASE_BUILD()
+#endif // NDEBUG/!NDEBUG
+

 #endif  // _WX_LOG_H_
 
 #endif  // _WX_LOG_H_