X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/bddd7a8d8953cf4c09e56c13e1bfcc594ba0267e..f6840be66eb772c08f0cbb43de677509d5d132bb:/include/wx/dynlib.h diff --git a/include/wx/dynlib.h b/include/wx/dynlib.h index 7870ed3fe8..8bcc8b4d35 100644 --- a/include/wx/dynlib.h +++ b/include/wx/dynlib.h @@ -12,64 +12,294 @@ #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 -#include "wx/setup.h" +#include "wx/defs.h" -#if wxUSE_DYNAMIC_LOADER +#if wxUSE_DYNLIB_CLASS -#include "wx/dynload.h" // Use the new (version of) wxDynamicLibrary instead +#include "wx/string.h" +#include "wx/dynarray.h" -#elif wxUSE_DYNLIB_CLASS +// FIXME: can this go in private.h or something too?? +#if defined(__WXPM__) || defined(__EMX__) +#define INCL_DOS +#include +#endif -#include "wx/string.h" -#include "wx/list.h" -#include "wx/hash.h" +#ifdef __WXMSW__ +#include "wx/msw/private.h" +#endif + +#if defined(HAVE_DLERROR) && !defined(__EMX__) + #define wxHAVE_DYNLIB_ERROR +#endif + +class WXDLLIMPEXP_BASE wxDynamicLibraryDetailsCreator; -// this is normally done by configure, but I leave it here for now... -#if defined(__UNIX__) && !(defined(HAVE_DLOPEN) || defined(HAVE_SHL_LOAD)) -# if defined(__LINUX__) || defined(__SOLARIS__) || defined(__SUNOS__) || defined(__FREEBSD__) -# define HAVE_DLOPEN -# elif defined(__HPUX__) -# define HAVE_SHL_LOAD -# endif // Unix flavour -#endif // !Unix or already have some HAVE_xxx defined +// ---------------------------------------------------------------------------- +// conditional compilation +// ---------------------------------------------------------------------------- // Note: WXPM/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__) -# define INCL_DOS -# include - typedef HMODULE wxDllType; +#if defined(__WXPM__) || defined(__EMX__) || defined(__WINDOWS__) + typedef HMODULE wxDllType; #elif defined(HAVE_DLOPEN) -# include - typedef void *wxDllType; + #include + typedef void *wxDllType; #elif defined(HAVE_SHL_LOAD) -# include - typedef shl_t wxDllType; -#elif defined(__WINDOWS__) -# include // needed to get HMODULE - typedef HMODULE wxDllType; + #include + typedef shl_t wxDllType; #elif defined(__DARWIN__) - typedef void *wxDllType; + typedef void *wxDllType; #elif defined(__WXMAC__) - typedef void *wxDllType; + #include + typedef CFragConnectionID wxDllType; +#else + #error "Dynamic Loading classes can't be compiled on this platform, sorry." +#endif + +// ---------------------------------------------------------------------------- +// constants +// ---------------------------------------------------------------------------- + +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 + // name without appending the usual dll + // filename extension. + wxDL_NOSHARE = 0x00000010, // load new DLL, don't reuse already loaded + // (only for wxPluginManager) + + wxDL_DEFAULT = wxDL_NOW // default flags correspond to Win32 +}; + +enum wxDynamicLibraryCategory +{ + wxDL_LIBRARY, // standard library + wxDL_MODULE // loadable module/plugin +}; + +enum wxPluginCategory +{ + wxDL_PLUGIN_GUI, // plugin that uses GUI classes + wxDL_PLUGIN_BASE // wxBase-only plugin +}; + +// ---------------------------------------------------------------------------- +// macros +// ---------------------------------------------------------------------------- + +// when loading a function from a DLL you always have to cast the returned +// "void *" pointer to the correct type and, even more annoyingly, you have to +// repeat this type twice if you want to declare and define a function pointer +// all in one line +// +// this macro makes this slightly less painful by allowing you to specify the +// type only once, as the first parameter, and creating a variable of this type +// called "pfn" initialized with the "name" from the "dynlib" +#define wxDYNLIB_FUNCTION(type, name, dynlib) \ + type pfn ## name = (type)(dynlib).GetSymbol(_T(#name)) + +// ---------------------------------------------------------------------------- +// 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 +{ +public: + // return 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 the platform standard DLL extension (with leading dot) + static const wxChar *GetDllExt() { return ms_dllext; } + + wxDynamicLibrary() : m_handle(0) { } + wxDynamicLibrary(const wxString& libname, int flags = wxDL_DEFAULT) + : m_handle(0) + { + Load(libname, flags); + } + + // NOTE: this class is (deliberately) not virtual, do not attempt + // to use it polymorphically. + ~wxDynamicLibrary() { Unload(); } + + // 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 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 + // doing this + wxDllType Detach() { wxDllType h = m_handle; m_handle = 0; return h; } + + // unload the given library handle (presumably returned by Detach() before) + static void Unload(wxDllType handle); + + // unload the library, also done automatically in dtor + void Unload() { if ( IsLoaded() ) { Unload(m_handle); m_handle = 0; } } + + // 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) + // + // Since it is perfectly valid for the returned symbol to actually be NULL, + // that is not always indication of an error. Pass and test the parameter + // 'success' for a true indication of success or failure to load the + // symbol. + // + // 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 = 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 -# error "wxLibrary can't be compiled on this platform, sorry." -#endif // OS + 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 occured + 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 name of wxWidgets plugin (adds compiler and version info + // to the filename): + static wxString + CanonicalizePluginName(const wxString& name, + wxPluginCategory cat = wxDL_PLUGIN_GUI); + + // return plugin directory on platforms where it makes sense and empty + // string on others: + static wxString GetPluginsDirectory(); -// LoadLibrary is defined in windows.h as LoadLibraryA, but wxDllLoader method -// should be called LoadLibrary, not LoadLibraryA or LoadLibraryW! -#if defined(__WIN32__) && defined(LoadLibrary) -# include "wx/msw/winundef.h" + +#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; + + // the handle to DLL or NULL + wxDllType m_handle; + + // no copy ctor/assignment operators (or we'd try to unload the library + // twice) + DECLARE_NO_COPY_CLASS(wxDynamicLibrary) +}; + + // ---------------------------------------------------------------------------- // 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 @@ -86,10 +316,10 @@ public: 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& libname, bool *success = 0); + static wxDllType LoadLibrary(const wxString& name, bool *success = NULL); /* This function unloads the shared library previously loaded with @@ -102,7 +332,7 @@ public: itself or NULL if back linking is not supported by the current platform (e.g. Win32). */ - static wxDllType GetProgramHandle(); + static wxDllType GetProgramHandle() { return wxDynamicLibrary::GetProgramHandle(); } /* This function resolves a symbol in a loaded DLL, such as a @@ -113,78 +343,23 @@ public: Returns the pointer to the symbol or NULL on error. */ - static void *GetSymbol(wxDllType dllHandle, - const wxString &name, - bool *success = NULL); + static void *GetSymbol(wxDllType dllHandle, const wxString &name, bool *success = 0); // return the standard DLL extension (with leading dot) for this platform - static const wxString &GetDllExt() { return ms_dllext; } + static wxString GetDllExt() { return wxDynamicLibrary::GetDllExt(); } private: - // forbid construction of objects - wxDllLoader(); - static const wxString ms_dllext; -}; - -// ---------------------------------------------------------------------------- -// wxDynamicLibrary - friendly interface to wxDllLoader -// ---------------------------------------------------------------------------- - -class WXDLLIMPEXP_BASE wxDynamicLibrary -{ -public: - // ctors - wxDynamicLibrary() { m_library = 0; } - wxDynamicLibrary(const wxString& name) { Load(name); } - - // return TRUE if the library was loaded successfully - bool IsLoaded() const { return m_library != 0; } - operator bool() const { return IsLoaded(); } - - // load the library with the given name (full or not), return TRUE on - // success - bool Load(const wxString& name) - { - m_library = wxDllLoader::LoadLibrary(name); - - return IsLoaded(); - } - - // unload the library, also done automatically in dtor - void Unload() - { - if ( IsLoaded() ) - wxDllLoader::UnloadLibrary(m_library); - } - // load a symbol from the library, return NULL if an error occured or - // symbol wasn't found - void *GetSymbol(const wxString& name) const - { - wxCHECK_MSG( IsLoaded(), NULL, - _T("can't load symbol from unloaded library") ); - - return wxDllLoader::GetSymbol(m_library, name); - } - - // unload the library - // - // NB: dtor is not virtual, don't derive from this class - ~wxDynamicLibrary() { Unload(); } - -private: - // the handle to DLL or NULL - wxDllType m_library; - - // no copy ctor/assignment operators (or we'd try to unload the library - // twice) - DECLARE_NO_COPY_CLASS(wxDynamicLibrary) + wxDllLoader(); // forbid construction of objects }; + // ---------------------------------------------------------------------------- // wxLibrary // ---------------------------------------------------------------------------- +#include "wx/hash.h" + class WXDLLIMPEXP_BASE wxLibrary : public wxObject { public: @@ -231,6 +406,8 @@ protected: extern WXDLLIMPEXP_DATA_BASE(wxLibraries) wxTheLibraries; +#endif // WXWIN_COMPATIBILITY_2_2 && wxUSE_DYNAMIC_LOADER + // ---------------------------------------------------------------------------- // Interesting defines // ----------------------------------------------------------------------------