// Created: 20/07/98
// RCS-ID: $Id$
// Copyright: (c) 1998 Guilhem Lavaux
-// Licence: wxWindows license
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_DYNLIB_H__
#define _WX_DYNLIB_H__
-#ifdef __GNUG__
-# pragma interface
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
+# pragma interface "dynlib.h"
#endif
#include "wx/setup.h"
#if wxUSE_DYNLIB_CLASS
#include "wx/string.h"
-#include "wx/list.h"
-#include "wx/hash.h"
-// 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
+// FIXME: can this go in private.h or something too??
+#if defined(__WXPM__) || defined(__EMX__)
+#define INCL_DOS
+#include <os2.h>
+#endif
+
+#ifdef __WXMSW__
+#include "wx/msw/private.h"
+#endif
+
+// ----------------------------------------------------------------------------
+// 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 <os2.h>
- typedef HMODULE wxDllType;
+#if defined(__WXPM__) || defined(__EMX__) || defined(__WINDOWS__)
+ typedef HMODULE wxDllType;
#elif defined(HAVE_DLOPEN)
- typedef void *wxDllType;
+ typedef void *wxDllType;
#elif defined(HAVE_SHL_LOAD)
-# include <dl.h>
- typedef shl_t wxDllType;
-#elif defined(__WINDOWS__)
-# include <windows.h> // needed to get HMODULE
- typedef HMODULE wxDllType;
-#elif defined(__APPLE__) && defined(__UNIX__)
- typedef void *wxDllType;
+ #include <dl.h>
+ typedef shl_t wxDllType;
+#elif defined(__DARWIN__)
+ typedef void *wxDllType;
#elif defined(__WXMAC__)
- typedef CFragConnectionID wxDllType;
+ #include <CodeFragments.h>
+ typedef CFragConnectionID wxDllType;
#else
-# error "wxLibrary can't be compiled on this platform, sorry."
-#endif // OS
+ #error "Dynamic Loading classes can't be compiled on this platform, sorry."
+#endif
+
+// ----------------------------------------------------------------------------
+// constants
+// ----------------------------------------------------------------------------
-// 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"
+enum wxDLFlags
+{
+ wxDL_LAZY = 0x00000001, // resolve undefined symbols at first use
+ wxDL_NOW = 0x00000002, // resolve undefined symbols on load
+ 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
+
+ // FIXME: why? (VZ)
+#ifdef __osf__
+ wxDL_DEFAULT = wxDL_LAZY
+#else
+ wxDL_DEFAULT = wxDL_LAZY | wxDL_GLOBAL
#endif
+};
+
+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<name>" initialized with the "name" from the "dynlib"
+#define wxDYNLIB_FUNCTION(type, name, dynlib) \
+ type pfn ## name = (type)(dynlib).GetSymbol(_T(#name))
+
+// ---------------------------------------------------------------------------
+// wxDynamicLibrary
+// ---------------------------------------------------------------------------
+
+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(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 = 0) const;
+
+
+ // 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();
+
+
+#if WXWIN_COMPATIBILITY_2_2
+ operator bool() const { return IsLoaded(); }
+#endif
+
+protected:
+ // the real implementation of GetSymbol()
+ void *DoGetSymbol(const wxString& name, bool *success = 0) const;
+
+
+ // 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
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 WXDLLEXPORT wxDllLoader
+class WXDLLIMPEXP_BASE wxDllLoader
{
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 = NULL);
+ static wxDllType LoadLibrary(const wxString& name, bool *success = NULL);
/*
This function unloads the shared library previously loaded with
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
Returns the pointer to the symbol or NULL on error.
*/
- static void * GetSymbol(wxDllType dllHandle, const wxString &name);
+ 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();
-
-private:
- // forbid construction of objects
- wxDllLoader();
-};
-
-// ----------------------------------------------------------------------------
-// wxDynamicLibrary - friendly interface to wxDllLoader
-// ----------------------------------------------------------------------------
-
-class WXDLLEXPORT 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(); }
+ static wxString GetDllExt() { return wxDynamicLibrary::GetDllExt(); }
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
// ----------------------------------------------------------------------------
-class WXDLLEXPORT wxLibrary : public wxObject
+#include "wx/hash.h"
+
+class WXDLLIMPEXP_BASE wxLibrary : public wxObject
{
public:
wxLibrary(wxDllType handle);
// wxLibraries
// ----------------------------------------------------------------------------
-class WXDLLEXPORT wxLibraries
+class WXDLLIMPEXP_BASE wxLibraries
{
public:
wxLibraries();
// Global variables
// ----------------------------------------------------------------------------
-extern wxLibraries wxTheLibraries;
+extern WXDLLIMPEXP_DATA_BASE(wxLibraries) wxTheLibraries;
+
+#endif // WXWIN_COMPATIBILITY_2_2 && wxUSE_DYNAMIC_LOADER
// ----------------------------------------------------------------------------
// Interesting defines
// ----------------------------------------------------------------------------
#define WXDLL_ENTRY_FUNCTION() \
-extern "C" wxClassInfo *wxGetClassFirst(); \
-wxClassInfo *wxGetClassFirst() { \
+extern "C" WXEXPORT const wxClassInfo *wxGetClassFirst(); \
+const wxClassInfo *wxGetClassFirst() { \
return wxClassInfo::GetFirst(); \
}
projects / wxWidgets.git / blobdiff