X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/af58844636f51ca9c9350c66de3baf427d3e8646..c564ca3c975aba89f8b911ace0f240c0aaf4cf73:/include/wx/log.h

diff --git a/include/wx/log.h b/include/wx/log.h
index 60b6e8b620..90dde5e6b4 100644
--- a/include/wx/log.h
+++ b/include/wx/log.h
@@ -29,7 +29,7 @@ typedef unsigned long wxLogLevel;
     #define wxTraceResAlloc 0x0004  // trace GDI resource allocation
     #define wxTraceRefCount 0x0008  // trace various ref counting operations
 
-    #ifdef  __WXMSW__
+    #ifdef  __WINDOWS__
         #define wxTraceOleCalls 0x0100  // OLE interface calls
     #endif
 
@@ -43,15 +43,23 @@ typedef unsigned long wxLogLevel;
 #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"
 
-#ifndef __WXPALMOS5__
 #ifndef __WXWINCE__
     #include <time.h>   // for time_t
 #endif
-#endif // ! __WXPALMOS5__
 
 #include "wx/dynarray.h"
 #include "wx/hashmap.h"
@@ -78,13 +86,18 @@ typedef unsigned long wxLogLevel;
     #endif
 #endif // wxUSE_LOG_TRACE
 
-// ----------------------------------------------------------------------------
-// forward declarations
-// ----------------------------------------------------------------------------
+// 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;
 
-#if wxUSE_GUI
-    class WXDLLIMPEXP_FWD_CORE wxFrame;
-#endif // wxUSE_GUI
+    #ifdef WXBUILDING
+        #define wxLOG_COMPONENT "wx"
+    #endif
+#endif
 
 // ----------------------------------------------------------------------------
 // constants
@@ -115,7 +128,7 @@ enum wxLogLevelValues
 #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
 
@@ -131,18 +144,20 @@ public:
     // default ctor creates an uninitialized object
     wxLogRecordInfo()
     {
-        memset(this, 0, sizeof(this));
+        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 *func_,
+                    const char *component_)
     {
         filename = filename_;
         func = func_;
         line = line_;
+        component = component_;
 
         timestamp = time(NULL);
 
@@ -186,6 +201,10 @@ public:
     // 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;
 
@@ -248,7 +267,7 @@ public:
 private:
     void Copy(const wxLogRecordInfo& other)
     {
-        memcpy(this, &other, sizeof(wxLogRecordInfo));
+        memcpy(this, &other, sizeof(*this));
         if ( other.m_data )
            m_data = new ExtraData(*other.m_data);
     }
@@ -268,6 +287,54 @@ private:
 
 #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
@@ -277,50 +344,106 @@ class WXDLLIMPEXP_BASE wxLog
 {
 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
+    // ----------------------
+
+    // 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() { return ms_doLog; }
+    static bool IsEnabled()
+    {
+#if wxUSE_THREADS
+        if ( !wxThread::IsMain() )
+            return IsThreadLoggingEnabled();
+#endif // wxUSE_THREADS
 
-    // is logging at this level enabled?
-    static bool IsLevelEnabled(wxLogLevel level)
-        { return IsEnabled() && level <= ms_logLevel; }
+        return ms_doLog;
+    }
 
     // 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; }
+
 
     // message buffering
+    // -----------------
 
     // 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();
 
-    // 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();
 
-    // 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()
@@ -330,14 +453,6 @@ public:
     // 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();
@@ -364,7 +479,27 @@ public:
 
     // get string trace masks: note that this is MT-unsafe if other threads can
     // call AddTraceMask() concurrently
-    static const wxArrayString& GetTraceMasks() { return ms_aTraceMasks; }
+    static const wxArrayString& GetTraceMasks();
+
+    // is this trace mask in the list?
+    static bool IsAllowedTraceMask(const wxString& mask);
+
+
+    // log formatting
+    // -----------------
+
+    // 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);
+
+
+    // 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.
+
 
     // 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
@@ -375,17 +510,6 @@ public:
     static void DisableTimestamp() { SetTimestamp(wxEmptyString); }
 
 
-    // accessors
-
-    // gets the verbose status
-    static bool GetVerbose() { return ms_bVerbose; }
-
-    // is this trace mask in the list?
-    static bool IsAllowedTraceMask(const wxString& mask);
-
-    // return the current loglevel limit
-    static wxLogLevel GetLogLevel() { return ms_logLevel; }
-
     // get the current timestamp format string (maybe empty)
     static const wxString& GetTimestamp() { return ms_timestamp; }
 
@@ -394,9 +518,10 @@ public:
     // 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 != NULL (don't
-    // change it otherwise)
+    // 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, time_t t);
 
     // these methods should only be called from derived classes DoLogRecord(),
     // DoLogTextAtLevel() and DoLogText() implementations respectively and
@@ -441,17 +566,19 @@ public:
 
 #if WXWIN_COMPATIBILITY_2_6
     // this function doesn't do anything any more, don't call it
-    wxDEPRECATED_INLINE(
-        static wxChar *SetLogBuffer(wxChar *, size_t = 0), return NULL;
+    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
-    wxDEPRECATED_INLINE( static void SetTraceMask(wxTraceMask ulMask),
+    static wxDEPRECATED_INLINE( void SetTraceMask(wxTraceMask ulMask),
         ms_ulTraceMask = ulMask; )
-    wxDEPRECATED_BUT_USED_INTERNALLY_INLINE( static wxTraceMask GetTraceMask(),
-        return ms_ulTraceMask; )
+
+    // 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:
@@ -512,9 +639,37 @@ protected:
     unsigned LogLastRepeatIfNeeded();
 
 private:
-    // implement of LogLastRepeatIfNeeded(): it assumes that the
-    // caller had already locked GetPreviousLogCS()
-    unsigned LogLastRepeatIfNeededUnlocked();
+#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();
+
+    // 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.
+
 
     // static variables
     // ----------------
@@ -539,9 +694,6 @@ private:
 #if WXWIN_COMPATIBILITY_2_8
     static wxTraceMask ms_ulTraceMask;   // controls wxLogTrace behaviour
 #endif // WXWIN_COMPATIBILITY_2_8
-
-    // currently enabled trace masks
-    static wxArrayString ms_aTraceMasks;
 };
 
 // ----------------------------------------------------------------------------
@@ -738,9 +890,10 @@ public:
     wxLogger(wxLogLevel level,
              const char *filename,
              int line,
-             const char *func)
+             const char *func,
+             const char *component)
         : m_level(level),
-          m_info(filename, line, func)
+          m_info(filename, line, func, component)
     {
     }
 
@@ -757,12 +910,12 @@ public:
     // 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)
+    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, 0);
+        m_info.StoreValue(key, value);
         return *this;
     }
 
@@ -774,7 +927,8 @@ public:
     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) )
+        if ( m_level == wxLOG_FatalError ||
+                wxLog::IsLevelEnabled(m_level, m_info.component) )
             DoCallOnLog(format, argptr);
     }
 
@@ -794,6 +948,16 @@ public:
         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():
 
@@ -819,10 +983,15 @@ public:
         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, (void *, const wxFormatString&),
+        2, (wxObject *, const wxFormatString&),
         DoLogWithPtr, DoLogWithPtrUtf8
     )
 
@@ -838,8 +1007,8 @@ public:
     )
 
     // special versions for wxLogTrace() which is passed either string or
-    // integer (TODO) mask as first argument determining whether the message
-    // should be logged or not
+    // integer mask as first argument determining whether the message should be
+    // logged or not
     WX_DEFINE_VARARG_FUNC_VOID
     (
         LogTrace,
@@ -847,6 +1016,15 @@ public:
         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,
@@ -876,16 +1054,16 @@ public:
                                (f1, wxFormatString(f2)))
 
     WX_VARARG_WATCOM_WORKAROUND(void, Log,
-                               2, (void *, const wxString&),
+                               2, (wxObject *, const wxString&),
                                (f1, wxFormatString(f2)))
     WX_VARARG_WATCOM_WORKAROUND(void, Log,
-                               2, (void *, const wxCStrData&),
+                               2, (wxObject *, const wxCStrData&),
                                (f1, wxFormatString(f2)))
     WX_VARARG_WATCOM_WORKAROUND(void, Log,
-                               2, (void *, const char *),
+                               2, (wxObject *, const char *),
                                (f1, wxFormatString(f2)))
     WX_VARARG_WATCOM_WORKAROUND(void, Log,
-                               2, (void *, const wchar_t *),
+                               2, (wxObject *, const wchar_t *),
                                (f1, wxFormatString(f2)))
 
     WX_VARARG_WATCOM_WORKAROUND(void, LogAtLevel,
@@ -913,6 +1091,21 @@ public:
     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:
@@ -947,7 +1140,7 @@ private:
 
     void DoLogAtLevel(wxLogLevel level, const wxChar *format, ...)
     {
-        if ( !wxLog::IsLevelEnabled(level) )
+        if ( !wxLog::IsLevelEnabled(level, m_info.component) )
             return;
 
         va_list argptr;
@@ -968,6 +1161,21 @@ private:
         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
@@ -1001,7 +1209,7 @@ private:
 
     void DoLogAtLevelUtf8(wxLogLevel level, const char *format, ...)
     {
-        if ( !wxLog::IsLevelEnabled(level) )
+        if ( !wxLog::IsLevelEnabled(level, m_info.component) )
             return;
 
         va_list argptr;
@@ -1022,6 +1230,21 @@ private:
         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)
@@ -1031,7 +1254,7 @@ private:
 
     void DoCallOnLog(const wxString& format, va_list argptr)
     {
-        wxLog::OnLog(m_level, wxString::FormatV(format, argptr), m_info);
+        DoCallOnLog(m_level, format, argptr);
     }
 
 
@@ -1092,7 +1315,7 @@ WXDLLIMPEXP_BASE const wxChar* wxSysErrorMsg(unsigned long nErrCode = 0);
 
 // creates wxLogger object for the current location
 #define wxMAKE_LOGGER(level) \
-    wxLogger(wxLOG_##level, __FILE__, __LINE__, __WXFUNCTION__)
+    wxLogger(wxLOG_##level, __FILE__, __LINE__, __WXFUNCTION__, wxLOG_COMPONENT)
 
 // this macro generates the expression which logs whatever follows it in
 // parentheses at the level specified as argument
@@ -1125,13 +1348,13 @@ WXDLLIMPEXP_BASE const wxChar* wxSysErrorMsg(unsigned long nErrCode = 0);
 //       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) )                              \
+    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 wxLogFatalError wxDO_LOG(FatalError)
 #define wxVLogFatalError(format, argptr) wxDO_LOGV(FatalError, format, argptr)
 
 #define wxLogError wxDO_LOG_IF_ENABLED(Error)
@@ -1145,12 +1368,14 @@ WXDLLIMPEXP_BASE const wxChar* wxSysErrorMsg(unsigned long nErrCode = 0);
 
 // this one is special as it only logs if we're in verbose mode
 #define wxLogVerbose                                                          \
-    if ( !(wxLog::IsLevelEnabled(wxLOG_Info) && wxLog::GetVerbose()) )        \
+    if ( !(wxLog::IsLevelEnabled(wxLOG_Info, wxLOG_COMPONENT) &&              \
+            wxLog::GetVerbose()) )                                            \
     {}                                                                        \
     else                                                                      \
         wxDO_LOG(Info)
 #define wxVLogVerbose(format, argptr)                                         \
-    if ( !(wxLog::IsLevelEnabled(wxLOG_Info) && wxLog::GetVerbose()) )        \
+    if ( !(wxLog::IsLevelEnabled(wxLOG_Info, wxLOG_COMPONENT) &&              \
+            wxLog::GetVerbose()) )                                            \
     {}                                                                        \
     else                                                                      \
         wxDO_LOGV(Info, format, argptr)
@@ -1167,7 +1392,7 @@ WXDLLIMPEXP_BASE const wxChar* wxSysErrorMsg(unsigned long nErrCode = 0);
 // always evaluated, unlike for the other log functions
 #define wxLogGeneric wxMAKE_LOGGER(Max).LogAtLevel
 #define wxVLogGeneric(level, format, argptr) \
-    if ( !wxLog::IsLevelEnabled(wxLOG_##level) )                              \
+    if ( !wxLog::IsLevelEnabled(wxLOG_##level, wxLOG_COMPONENT) )             \
     {}                                                                        \
     else                                                                      \
         wxDO_LOGV(level, format, argptr)
@@ -1176,19 +1401,30 @@ WXDLLIMPEXP_BASE const wxChar* wxSysErrorMsg(unsigned long nErrCode = 0);
 // 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) )                                \
+    if ( !wxLog::IsLevelEnabled(wxLOG_Error, wxLOG_COMPONENT) )               \
     {}                                                                        \
     else                                                                      \
-        wxMAKE_LOGGER(Error).MaybeStore(wxLOG_KEY_SYS_ERROR_CODE).Log
+        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).LogV
+    wxMAKE_LOGGER(Error).MaybeStore(wxLOG_KEY_SYS_ERROR_CODE, \
+                                    wxSysErrorCode()).LogV
 
 #if wxUSE_GUI
     // wxLogStatus() is similar to wxLogSysError() as it allows to optionally
@@ -1196,7 +1432,7 @@ WXDLLIMPEXP_BASE const wxChar* wxSysErrorMsg(unsigned long nErrCode = 0);
     #define wxLOG_KEY_FRAME "wx.frame"
 
     #define wxLogStatus                                                       \
-        if ( !wxLog::IsLevelEnabled(wxLOG_Status) )                           \
+        if ( !wxLog::IsLevelEnabled(wxLOG_Status, wxLOG_COMPONENT) )          \
         {}                                                                    \
         else                                                                  \
             wxMAKE_LOGGER(Status).MaybeStore(wxLOG_KEY_FRAME).Log
@@ -1226,24 +1462,24 @@ WXDLLIMPEXP_BASE const wxChar* wxSysErrorMsg(unsigned long nErrCode = 0);
 // 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 wxString&))           \
+    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 wxString& WXUNUSED(format),             \
+    inline void wxVLog##level(const wxFormatString& WXUNUSED(format),       \
                               va_list WXUNUSED(argptr)) { }                 \
 
 #define wxDEFINE_EMPTY_LOG_FUNCTION2(level, argclass)                       \
-    WX_DEFINE_VARARG_FUNC_NOP(wxLog##level, 2, (argclass, const wxString&)) \
+    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),                       \
-                              const wxString& WXUNUSED(format),             \
+                              const wxFormatString& WXUNUSED(format),       \
                               va_list WXUNUSED(argptr)) {}
 
 wxDEFINE_EMPTY_LOG_FUNCTION(FatalError);
@@ -1310,16 +1546,21 @@ public:
     #ifdef HAVE_VARIADIC_MACROS
         #define wxLogDebug(fmt, ...) wxLogNop()
     #else // !HAVE_VARIADIC_MACROS
-        WX_DEFINE_VARARG_FUNC_NOP(wxLogDebug, 1, (const wxString&))
+        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) )                            \
+        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()
 
@@ -1327,9 +1568,9 @@ public:
         #define wxLogTrace(mask, fmt, ...) wxLogNop()
     #else // !HAVE_VARIADIC_MACROS
         #if WXWIN_COMPATIBILITY_2_8
-        WX_DEFINE_VARARG_FUNC_NOP(wxLogTrace, 2, (wxTraceMask, const wxString&))
+        WX_DEFINE_VARARG_FUNC_NOP(wxLogTrace, 2, (wxTraceMask, const wxFormatString&))
         #endif
-        WX_DEFINE_VARARG_FUNC_NOP(wxLogTrace, 2, (const wxString&, const wxString&))
+        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*))
@@ -1379,5 +1620,14 @@ wxSafeShowMessage(const wxString& title, const wxString& text);
     #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_