X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/defbed48e78f4e84b35f62c2c1b7fd58d740501c..c2193ac9115470a4ecbc6844bbe19734a8c636ad:/include/wx/dynlib.h?ds=inline diff --git a/include/wx/dynlib.h b/include/wx/dynlib.h index ceef9b58c5..a6a45f74c1 100644 --- a/include/wx/dynlib.h +++ b/include/wx/dynlib.h @@ -12,45 +12,45 @@ #ifndef _WX_DYNLIB_H__ #define _WX_DYNLIB_H__ -#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) -# pragma interface "dynlib.h" -#endif - -#include "wx/setup.h" +#include "wx/defs.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__) -#define INCL_DOS -#include +#if defined(__OS2__) || defined(__EMX__) +#include "wx/os2/private.h" #endif #ifdef __WXMSW__ #include "wx/msw/private.h" #endif -class WXDLLIMPEXP_BASE wxDynamicLibraryDetailsCreator; +// 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_FWD_BASE wxDynamicLibraryDetailsCreator; // ---------------------------------------------------------------------------- // conditional compilation // ---------------------------------------------------------------------------- -// Note: WXPM/EMX has to be tested first, since we want to use +// Note: __OS2__/EMX has to be tested first, since we want to use // native version, even if configure detected presence of DLOPEN. -#if defined(__WXPM__) || defined(__EMX__) || defined(__WINDOWS__) +#if defined(__OS2__) || defined(__EMX__) || defined(__WINDOWS__) typedef HMODULE wxDllType; +#elif defined(__DARWIN__) + // Don't include dlfcn.h on Darwin, we may be using our own replacements. + typedef void *wxDllType; #elif defined(HAVE_DLOPEN) #include typedef void *wxDllType; #elif defined(HAVE_SHL_LOAD) #include typedef shl_t wxDllType; -#elif defined(__DARWIN__) - typedef void *wxDllType; #elif defined(__WXMAC__) #include typedef CFragConnectionID wxDllType; @@ -65,21 +65,20 @@ class WXDLLIMPEXP_BASE wxDynamicLibraryDetailsCreator; 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 + // (default, always the case under Win32) 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. - 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_QUIET = 0x00000020, // don't log an error if failed to load + + wxDL_DEFAULT = wxDL_NOW // default flags correspond to Win32 }; enum wxDynamicLibraryCategory @@ -109,6 +108,63 @@ enum wxPluginCategory #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 // ---------------------------------------------------------------------------- @@ -174,7 +230,7 @@ public: 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) @@ -196,8 +252,8 @@ public: // 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); - + 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 // doing this @@ -239,12 +295,40 @@ public: 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 + } + +#ifdef __WXMSW__ + // this function is useful for loading functions from the standard Windows + // DLLs: such functions have an 'A' (in ANSI build) or 'W' (in Unicode, or + // wide character build) suffix if they take string parameters + static void *RawGetSymbolAorW(wxDllType handle, const wxString& name) + { + return RawGetSymbol + ( + handle, + name + +#if wxUSE_UNICODE + L'W' +#else + 'A' +#endif + ); + } + + void *GetSymbolAorW(const wxString& name) const + { + return RawGetSymbolAorW(m_handle, name); } +#endif // __WXMSW__ // return all modules/shared libraries in the address space of this process // - // returns an empty array if not implemented or an error occured + // returns an empty array if not implemented or an error occurred static wxDynamicLibraryDetailsArray ListLoaded(); // return platform-specific name of dynamic library with proper extension @@ -263,17 +347,18 @@ public: 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; +#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; + static const wxString ms_dllext; // the handle to DLL or NULL wxDllType m_handle; @@ -284,120 +369,6 @@ protected: }; -// ---------------------------------------------------------------------------- -// wxDllLoader: low level DLL functions, use wxDynamicLibrary in your code -// ---------------------------------------------------------------------------- - -#if WXWIN_COMPATIBILITY_2_2 && wxUSE_DYNAMIC_LOADER - -/* - 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 // ----------------------------------------------------------------------------