changed exceptions handling to work under wxGTK

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

diff --git a/include/wx/dynlib.h b/include/wx/dynlib.h
index 52f9ddc03b36e0b9212d95873d697c6bd1b492f5..a5dd3dbe5293236f557aaec97f323988b6db7cbf 100644 (file)
--- a/include/wx/dynlib.h
+++ b/include/wx/dynlib.h
@@ -12,15 +12,16 @@
 #ifndef _WX_DYNLIB_H__
 #define _WX_DYNLIB_H__
 
 #ifndef _WX_DYNLIB_H__
 #define _WX_DYNLIB_H__
 

-#if defined(__GNUG__) && !defined(__APPLE__)
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)

 #   pragma interface "dynlib.h"
 #endif
 
 #   pragma interface "dynlib.h"
 #endif
 

-#include "wx/setup.h"
+#include "wx/defs.h"

 
 #if wxUSE_DYNLIB_CLASS
 
 #include "wx/string.h"
 
 #if wxUSE_DYNLIB_CLASS
 
 #include "wx/string.h"

+#include "wx/dynarray.h"

 
 // FIXME: can this go in private.h or something too??
 #if defined(__WXPM__) || defined(__EMX__)
 
 // FIXME: can this go in private.h or something too??
 #if defined(__WXPM__) || defined(__EMX__)


@@ -32,6 +33,12 @@
 #include "wx/msw/private.h"
 #endif
 
 #include "wx/msw/private.h"
 #endif
 

+#if defined(HAVE_DLERROR) && !defined(__EMX__)
+    #define wxHAVE_DYNLIB_ERROR
+#endif
+
+class WXDLLIMPEXP_BASE wxDynamicLibraryDetailsCreator;
+

 // ----------------------------------------------------------------------------
 // conditional compilation
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // conditional compilation
 // ----------------------------------------------------------------------------


@@ -49,6 +56,7 @@
 #elif defined(__DARWIN__)
     typedef void               *wxDllType;
 #elif defined(__WXMAC__)
 #elif defined(__DARWIN__)
     typedef void               *wxDllType;
 #elif defined(__WXMAC__)

+    #include <CodeFragments.h>

     typedef CFragConnectionID   wxDllType;
 #else
     #error "Dynamic Loading classes can't be compiled on this platform, sorry."
     typedef CFragConnectionID   wxDllType;
 #else
     #error "Dynamic Loading classes can't be compiled on this platform, sorry."


@@ -61,21 +69,18 @@
 enum wxDLFlags
 {
     wxDL_LAZY       = 0x00000001,   // resolve undefined symbols at first use
 enum wxDLFlags
 {
     wxDL_LAZY       = 0x00000001,   // resolve undefined symbols at first use

+                                    // (only works on some Unix versions)

     wxDL_NOW        = 0x00000002,   // resolve undefined symbols on load
     wxDL_NOW        = 0x00000002,   // resolve undefined symbols on load

+                                    // (default, always the case under Win32)

     wxDL_GLOBAL     = 0x00000004,   // export extern symbols to subsequently
                                     // loaded libs.
     wxDL_GLOBAL     = 0x00000004,   // export extern symbols to subsequently
                                     // loaded libs.

-    wxDL_VERBATIM   = 0x00000008,   // Attempt to load the supplied library
+    wxDL_VERBATIM   = 0x00000008,   // attempt to load the supplied library

                                     // name without appending the usual dll
                                     // filename extension.
                                     // name without appending the usual dll
                                     // filename extension.

-

     wxDL_NOSHARE    = 0x00000010,   // load new DLL, don't reuse already loaded
     wxDL_NOSHARE    = 0x00000010,   // load new DLL, don't reuse already loaded

+                                    // (only for wxPluginManager)

 
 

-    // FIXME: why? (VZ)
-#ifdef __osf__
-    wxDL_DEFAULT    = wxDL_LAZY
-#else
-    wxDL_DEFAULT    = wxDL_LAZY | wxDL_GLOBAL
-#endif
+    wxDL_DEFAULT    = wxDL_NOW      // default flags correspond to Win32

 };
 
 enum wxDynamicLibraryCategory
 };
 
 enum wxDynamicLibraryCategory


@@ -105,9 +110,62 @@ enum wxPluginCategory
 #define wxDYNLIB_FUNCTION(type, name, dynlib) \
     type pfn ## name = (type)(dynlib).GetSymbol(_T(#name))
 
 #define wxDYNLIB_FUNCTION(type, name, dynlib) \
     type pfn ## name = (type)(dynlib).GetSymbol(_T(#name))
 

-// ---------------------------------------------------------------------------
-// wxDynamicLibrary
-// ---------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// wxDynamicLibraryDetails: contains details about a loaded wxDynamicLibrary
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_BASE wxDynamicLibraryDetails
+{
+public:
+    // ctor, normally never used as these objects are only created by
+    // wxDynamicLibrary::ListLoaded()
+    wxDynamicLibraryDetails() { m_address = NULL; m_length = 0; }
+
+    // get the (base) name
+    wxString GetName() const { return m_name; }
+
+    // get the full path of this object
+    wxString GetPath() const { return m_path; }
+
+    // get the load address and the extent, return true if this information is
+    // available
+    bool GetAddress(void **addr, size_t *len) const
+    {
+        if ( !m_address )
+            return false;
+
+        if ( addr )
+            *addr = m_address;
+        if ( len )
+            *len = m_length;
+
+        return true;
+    }
+
+    // return the version of the DLL (may be empty if no version info)
+    wxString GetVersion() const
+    {
+        return m_version;
+    }
+
+private:
+    wxString m_name,
+             m_path,
+             m_version;
+
+    void *m_address;
+    size_t m_length;
+
+    friend class wxDynamicLibraryDetailsCreator;
+};
+
+WX_DECLARE_USER_EXPORTED_OBJARRAY(wxDynamicLibraryDetails,
+                                  wxDynamicLibraryDetailsArray,
+                                  WXDLLIMPEXP_BASE);
+
+// ----------------------------------------------------------------------------
+// wxDynamicLibrary: represents a handle to a DLL/shared object
+// ----------------------------------------------------------------------------

 
 class WXDLLIMPEXP_BASE wxDynamicLibrary
 {
 
 class WXDLLIMPEXP_BASE wxDynamicLibrary
 {


@@ -130,11 +188,16 @@ public:
     //       to use it polymorphically.
     ~wxDynamicLibrary() { Unload(); }
 
     //       to use it polymorphically.
     ~wxDynamicLibrary() { Unload(); }
 

-    // return TRUE if the library was loaded successfully
+    // return true if the library was loaded successfully

     bool IsLoaded() const { return m_handle != 0; }
 
     // load the library with the given name (full or not), return true if ok
     bool IsLoaded() const { return m_handle != 0; }
 
     // load the library with the given name (full or not), return true if ok

-    bool Load(wxString libname, int flags = wxDL_DEFAULT);
+    bool Load(const wxString& libname, int flags = wxDL_DEFAULT);
+
+    // raw function for loading dynamic libs: always behaves as if
+    // wxDL_VERBATIM were specified and doesn't log error message if the
+    // library couldn't be loaded but simply returns NULL
+    static wxDllType RawLoad(const wxString& libname, int flags = wxDL_DEFAULT);

 
     // detach the library object from its handle, i.e. prevent the object from
     // unloading the library in its dtor -- the caller is now responsible for
 
     // detach the library object from its handle, i.e. prevent the object from
     // unloading the library in its dtor -- the caller is now responsible for


@@ -150,6 +213,16 @@ public:
     // Return the raw handle from dlopen and friends.
     wxDllType GetLibHandle() const { return m_handle; }
 
     // Return the raw handle from dlopen and friends.
     wxDllType GetLibHandle() const { return m_handle; }
 

+    // check if the given symbol is present in the library, useful to verify if
+    // a loadable module is our plugin, for example, without provoking error
+    // messages from GetSymbol()
+    bool HasSymbol(const wxString& name) const
+    {
+        bool ok;
+        DoGetSymbol(name, &ok);
+        return ok;
+    }
+

     // resolve a symbol in a loaded DLL, such as a variable or function name.
     // 'name' is the (possibly mangled) name of the symbol. (use extern "C" to
     // export unmangled names)
     // resolve a symbol in a loaded DLL, such as a variable or function name.
     // 'name' is the (possibly mangled) name of the symbol. (use extern "C" to
     // export unmangled names)


@@ -161,15 +234,30 @@ public:
     //
     // Returns a pointer to the symbol on success, or NULL if an error occurred
     // or the symbol wasn't found.
     //
     // Returns a pointer to the symbol on success, or NULL if an error occurred
     // or the symbol wasn't found.

-    void *GetSymbol(const wxString& name, bool *success = 0) const;
+    void *GetSymbol(const wxString& name, bool *success = NULL) const;

 
 

+    // low-level version of GetSymbol()
+    static void *RawGetSymbol(wxDllType handle, const wxString& name);
+    void *RawGetSymbol(const wxString& name) const
+    {
+#if defined (__WXPM__) || defined(__EMX__)
+        return GetSymbol(name);
+#else
+        return RawGetSymbol(m_handle, name);
+#endif
+    }
+
+    // return all modules/shared libraries in the address space of this process
+    //
+    // returns an empty array if not implemented or an error occurred
+    static wxDynamicLibraryDetailsArray ListLoaded();

 
     // return platform-specific name of dynamic library with proper extension
     // and prefix (e.g. "foo.dll" on Windows or "libfoo.so" on Linux)
     static wxString CanonicalizeName(const wxString& name,
                                      wxDynamicLibraryCategory cat = wxDL_LIBRARY);
 
 
     // return platform-specific name of dynamic library with proper extension
     // and prefix (e.g. "foo.dll" on Windows or "libfoo.so" on Linux)
     static wxString CanonicalizeName(const wxString& name,
                                      wxDynamicLibraryCategory cat = wxDL_LIBRARY);
 

-    // return name of wxWindows plugin (adds compiler and version info
+    // return name of wxWidgets plugin (adds compiler and version info

     // to the filename):
     static wxString
     CanonicalizePluginName(const wxString& name,
     // to the filename):
     static wxString
     CanonicalizePluginName(const wxString& name,


@@ -185,6 +273,15 @@ public:
 #endif
 
 protected:
 #endif
 
 protected:

+    // common part of GetSymbol() and HasSymbol()
+    void *DoGetSymbol(const wxString& name, bool *success = 0) const;
+
+#ifdef wxHAVE_DYNLIB_ERROR
+    // log the error after a dlxxx() function failure
+    static void Error();
+#endif // wxHAVE_DYNLIB_ERROR
+
+

     // platform specific shared lib suffix.
     static const wxChar *ms_dllext;
 
     // platform specific shared lib suffix.
     static const wxChar *ms_dllext;
 


@@ -219,11 +316,11 @@ public:
       which case the library is searched for in all standard locations
       (use GetDllExt() to construct the filename)
 
       which case the library is searched for in all standard locations
       (use GetDllExt() to construct the filename)
 

-      if success pointer is not NULL, it will be filled with TRUE if everything
-      went ok and FALSE otherwise
+      if success pointer is not NULL, it will be filled with true if everything
+      went ok and false otherwise

      */
     static wxDllType LoadLibrary(const wxString& name, bool *success = NULL);
      */
     static wxDllType LoadLibrary(const wxString& name, bool *success = NULL);

-    
+

     /*
       This function unloads the shared library previously loaded with
       LoadLibrary
     /*
       This function unloads the shared library previously loaded with
       LoadLibrary