#include "wx/msw/private.h"
#endif
-#if defined(HAVE_DLERROR) && !defined(__EMX__)
+// note that we have our own dlerror() implementation under Darwin
+#if (defined(HAVE_DLERROR) && !defined(__EMX__)) || defined(__DARWIN__)
#define wxHAVE_DYNLIB_ERROR
#endif
-class WXDLLIMPEXP_BASE wxDynamicLibraryDetailsCreator;
+class WXDLLIMPEXP_FWD_BASE wxDynamicLibraryDetailsCreator;
// ----------------------------------------------------------------------------
// conditional compilation
wxDL_NOSHARE = 0x00000010, // load new DLL, don't reuse already loaded
// (only for wxPluginManager)
+ wxDL_QUIET = 0x00000020, // don't log an error if failed to load
+
wxDL_DEFAULT = wxDL_NOW // default flags correspond to Win32
};
#define wxDYNLIB_FUNCTION(type, name, dynlib) \
type pfn ## name = (type)(dynlib).GetSymbol(_T(#name))
+
+// a more convenient function replacing wxDYNLIB_FUNCTION above
+//
+// it uses the convention that the type of the function is its name suffixed
+// with "_t" but it doesn't define a variable but just assigns the loaded value
+// to it and also allows to pass it the prefix to be used instead of hardcoding
+// "pfn" (the prefix can be "m_" or "gs_pfn" or whatever)
+//
+// notice that this function doesn't generate error messages if the symbol
+// couldn't be loaded, the caller should generate the appropriate message
+#define wxDL_INIT_FUNC(pfx, name, dynlib) \
+ pfx ## name = (name ## _t)(dynlib).RawGetSymbol(#name)
+
+#ifdef __WXMSW__
+
+// same as wxDL_INIT_FUNC() but appends 'A' or 'W' to the function name, see
+// wxDynamicLibrary::GetSymbolAorW()
+#define wxDL_INIT_FUNC_AW(pfx, name, dynlib) \
+ pfx ## name = (name ## _t)(dynlib).GetSymbolAorW(#name)
+
+#endif // __WXMSW__
+
+// the following macros can be used to redirect a whole library to a class and
+// check at run-time if the library is present and contains all required
+// methods
+//
+// notice that they are supposed to be used inside a class which has "m_ok"
+// member variable indicating if the library had been successfully loaded
+
+// helper macros constructing the name of the variable storing the function
+// pointer and the name of its type from the function name
+#define wxDL_METHOD_NAME(name) m_pfn ## name
+#define wxDL_METHOD_TYPE(name) name ## _t
+
+// parameters are:
+// - rettype: return type of the function, e.g. "int"
+// - name: name of the function, e.g. "foo"
+// - args: function signature in parentheses, e.g. "(int x, int y)"
+// - argnames: the names of the parameters in parentheses, e.g. "(x, y)"
+// - defret: the value to return if the library wasn't successfully loaded
+#define wxDL_METHOD_DEFINE( rettype, name, args, argnames, defret ) \
+ typedef rettype (* wxDL_METHOD_TYPE(name)) args ; \
+ wxDL_METHOD_TYPE(name) wxDL_METHOD_NAME(name); \
+ rettype name args \
+ { return m_ok ? wxDL_METHOD_NAME(name) argnames : defret; }
+
+#define wxDL_VOIDMETHOD_DEFINE( name, args, argnames ) \
+ typedef void (* wxDL_METHOD_TYPE(name)) args ; \
+ wxDL_METHOD_TYPE(name) wxDL_METHOD_NAME(name); \
+ void name args \
+ { if ( m_ok ) wxDL_METHOD_NAME(name) argnames ; }
+
+#define wxDL_METHOD_LOAD(lib, name) \
+ wxDL_METHOD_NAME(name) = \
+ (wxDL_METHOD_TYPE(name)) lib.GetSymbol(#name, &m_ok); \
+ if ( !m_ok ) return false
+
// ----------------------------------------------------------------------------
// wxDynamicLibraryDetails: contains details about a loaded wxDynamicLibrary
// ----------------------------------------------------------------------------
static wxDllType GetProgramHandle();
// return the platform standard DLL extension (with leading dot)
- static const wxChar *GetDllExt() { return ms_dllext; }
+ static const wxString& GetDllExt() { return ms_dllext; }
wxDynamicLibrary() : m_handle(0) { }
wxDynamicLibrary(const wxString& libname, int flags = wxDL_DEFAULT)
static wxString GetPluginsDirectory();
-#if WXWIN_COMPATIBILITY_2_2
- operator bool() const { return IsLoaded(); }
-#endif
-
protected:
// common part of GetSymbol() and HasSymbol()
void *DoGetSymbol(const wxString& name, bool *success = 0) const;
// platform specific shared lib suffix.
- static const wxChar *ms_dllext;
+ static const wxString ms_dllext;
// the handle to DLL or NULL
wxDllType m_handle;
};
-// ----------------------------------------------------------------------------
-// wxDllLoader: low level DLL functions, use wxDynamicLibrary in your code
-// ----------------------------------------------------------------------------
-
-#if WXWIN_COMPATIBILITY_2_2 && wxUSE_DYNAMIC_LOADER
-
-#include "wx/object.h"
-
-/*
- wxDllLoader is a class providing an interface similar to unix's dlopen().
- It is used by wxDynamicLibrary wxLibrary and manages the actual loading of
- DLLs and the resolving of symbols in them. There are no instances of this
- class, it simply serves as a namespace for its static member functions.
-*/
-class WXDLLIMPEXP_BASE wxDllLoader
-{
-public:
- /*
- This function loads the shared library libname into memory.
-
- libname may be either the full path to the file or just the filename in
- 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
- */
- static wxDllType LoadLibrary(const wxString& name, bool *success = NULL);
-
- /*
- This function unloads the shared library previously loaded with
- LoadLibrary
- */
- static void UnloadLibrary(wxDllType dll);
-
- /*
- This function returns a valid handle for the main program
- itself or NULL if back linking is not supported by the current platform
- (e.g. Win32).
- */
- static wxDllType GetProgramHandle() { return wxDynamicLibrary::GetProgramHandle(); }
-
- /*
- This function resolves a symbol in a loaded DLL, such as a
- variable or function name.
-
- dllHandle Handle of the DLL, as returned by LoadDll().
- name Name of the symbol.
-
- Returns the pointer to the symbol or NULL on error.
- */
- static void *GetSymbol(wxDllType dllHandle, const wxString &name, bool *success = 0);
-
- // return the standard DLL extension (with leading dot) for this platform
- static wxString GetDllExt() { return wxDynamicLibrary::GetDllExt(); }
-
-private:
-
- wxDllLoader(); // forbid construction of objects
-};
-
-
-// ----------------------------------------------------------------------------
-// wxLibrary
-// ----------------------------------------------------------------------------
-
-#include "wx/hash.h"
-
-class WXDLLIMPEXP_BASE wxLibrary : public wxObject
-{
-public:
- wxLibrary(wxDllType handle);
- virtual ~wxLibrary();
-
- // Get a symbol from the dynamic library
- void *GetSymbol(const wxString& symbname);
-
- // Create the object whose classname is "name"
- wxObject *CreateObject(const wxString& name);
-
-protected:
- void PrepareClasses(wxClassInfo *first);
-
- wxDllType m_handle;
-
-public:
- wxHashTable classTable;
-};
-
-// ----------------------------------------------------------------------------
-// wxLibraries
-// ----------------------------------------------------------------------------
-
-class WXDLLIMPEXP_BASE wxLibraries
-{
-public:
- wxLibraries();
- ~wxLibraries();
-
- // caller is responsible for deleting the returned pointer if !NULL
- wxLibrary *LoadLibrary(const wxString& basename);
-
- wxObject *CreateObject(const wxString& name);
-
-protected:
- wxList m_loaded;
-};
-
-// ----------------------------------------------------------------------------
-// Global variables
-// ----------------------------------------------------------------------------
-
-extern WXDLLIMPEXP_DATA_BASE(wxLibraries) wxTheLibraries;
-
-#endif // WXWIN_COMPATIBILITY_2_2 && wxUSE_DYNAMIC_LOADER
-
// ----------------------------------------------------------------------------
// Interesting defines
// ----------------------------------------------------------------------------
projects / wxWidgets.git / blobdiff