+/////////////////////////////////////////////////////////////////////////////
+// Name: dynlib.cpp
+// Purpose: Dynamic library management
+// Author: Guilhem Lavaux
+// Modified by:
+// Created: 20/07/98
+// RCS-ID: $Id$
+// Copyright: (c) Guilhem Lavaux
+// Licence: wxWindows license
+/////////////////////////////////////////////////////////////////////////////
+
#ifndef _WX_DYNLIB_H__
#define _WX_DYNLIB_H__
#ifdef __GNUG__
-#pragma interface
+# pragma interface
#endif
-#include <wx/string.h>
-#include <wx/list.h>
-#include <wx/dynarray.h>
-#include <wx/hash.h>
-
-#ifdef LoadLibrary
-#undef LoadLibrary
+#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
+
+#if defined(HAVE_DLOPEN)
+# include <dlfcn.h>
+ typedef void *wxDllType;
+#elif defined(HAVE_SHL_LOAD)
+# include <dl.h>
+ typedef shl_t wxDllType;
+#elif defined(__WINDOWS__)
+# include <windows.h>
+ typedef HMODULE wxDllType;
+#elif defined(__OS2__)
+# define INCL_DOS
+# include <os2.h>
+ typedef HMODULE wxDllType;
+#elif defined(__WXMAC__)
+ typedef CFragConnectionID wxDllType;
+#else
+# error "wxLibrary can't be compiled on this platform, sorry."
+#endif // OS
+
+// 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"
#endif
-// ---------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// wxDllLoader
+// ----------------------------------------------------------------------------
+/** wxDllLoader is a class providing an interface similar to unix's
+ dlopen(). It is used by the wxLibrary framework 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 wxDllLoader
+{
+ public:
+ /** This function loads a shared library into memory, with libname
+ being the basename of the library, without the filename
+ extension. No initialisation of the library will be done.
+ @param libname Name of the shared object to load.
+ @param success Must point to a bool variable which will be set to TRUE or FALSE.
+ @return A handle to the loaded DLL. Use success parameter to test if it is valid.
+ */
+ static wxDllType LoadLibrary(const wxString & libname, bool *success = NULL);
+ /** This function unloads the shared library. */
+ static void UnloadLibrary(wxDllType dll);
+ /** This function returns a valid handle for the main program
+ itself. */
+ static wxDllType GetProgramHandle(void);
+ /** This function resolves a symbol in a loaded DLL, such as a
+ variable or function name.
+ @param dllHandle Handle of the DLL, as returned by LoadDll().
+ @param name Name of the symbol.
+ @return A pointer to the symbol.
+ */
+ static void * GetSymbol(wxDllType dllHandle, const wxString &name);
+ private:
+ /// forbid construction of objects
+ wxDllLoader();
+};
+
+// ----------------------------------------------------------------------------
// wxLibrary
+// ----------------------------------------------------------------------------
-class wxLibrary: public wxObject {
- protected:
- void *m_handle;
- bool m_destroy;
- public:
- wxHashTable classTable;
+class wxLibrary : public wxObject
+{
+public:
+ wxHashTable classTable;
- public:
- wxLibrary(void *handle);
- ~wxLibrary(void);
+public:
+ wxLibrary(wxDllType handle);
+ ~wxLibrary();
- // Get a symbol from the dynamic library
- void *GetSymbol(const wxString& symbname);
+ // Get a symbol from the dynamic library
+ void *GetSymbol(const wxString& symbname);
- // Create the object whose classname is "name"
- wxObject *CreateObject(const wxString& name);
+ // Create the object whose classname is "name"
+ wxObject *CreateObject(const wxString& name);
- // Merge the symbols with the main symbols: WARNING! the library will not
- // be unloaded.
- void MergeWithSystem();
+protected:
+ void PrepareClasses(wxClassInfo *first);
- protected:
- void PrepareClasses(wxClassInfo **first);
+ wxDllType m_handle;
};
-// ---------------------------------------------------------------------------
+
+
+// ----------------------------------------------------------------------------
// wxLibraries
+// ----------------------------------------------------------------------------
-class wxLibraries {
- protected:
- wxList m_loaded;
- public:
- wxLibraries(void);
- ~wxLibraries(void);
+class wxLibraries
+{
+public:
+ wxLibraries();
+ ~wxLibraries();
+
+ // caller is responsible for deleting the returned pointer if !NULL
+ wxLibrary *LoadLibrary(const wxString& basename);
- wxLibrary *LoadLibrary(const wxString& name);
- wxObject *CreateObject(const wxString& name);
+ wxObject *CreateObject(const wxString& name);
+
+protected:
+ wxList m_loaded;
};
-// ---------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
// Global variables
+// ----------------------------------------------------------------------------
extern wxLibraries wxTheLibraries;
-// ---------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
// Interesting defines
+// ----------------------------------------------------------------------------
#define WXDLL_ENTRY_FUNCTION() \
-extern "C" wxClassInfo **wxGetClassFirst(); \
-wxClassInfo **wxGetClassFirst() { \
- return &wxClassInfo::first; \
+extern "C" wxClassInfo *wxGetClassFirst(); \
+wxClassInfo *wxGetClassFirst() { \
+ return wxClassInfo::GetFirst(); \
}
-#endif
+#endif // wxUSE_DYNLIB_CLASS
+
+#endif // _WX_DYNLIB_H__
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