Work on streams of all sorts. More to come.

[wxWidgets.git] / include / wx / dynlib.h

diff --git a/include/wx/dynlib.h b/include/wx/dynlib.h
index 745cdddcd0eaeaefcb87135d4e4672ce723e91ce..68a16fceaf189cbd1f9c03e6a3f1cf2649cd888e 100644 (file)
--- a/include/wx/dynlib.h
+++ b/include/wx/dynlib.h
@@ -13,36 +13,78 @@
 #define _WX_DYNLIB_H__
 
 #ifdef __GNUG__
-    #pragma interface
+#   pragma interface
 #endif
 
+#include <wx/setup.h>
+
+#if wxUSE_DYNLIB_CLASS
+
 #include <wx/string.h>
 #include <wx/list.h>
 #include <wx/hash.h>
 
-#if defined(HAVE_DLOPEN)
-    #include <dlfcn.h>
-
-    typedef void *wxDllType;
-#elif defined(HAVE_SHLLOAD)
-    #include <dl.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>
-
+#   include <windows.h>
     typedef HMODULE wxDllType;
 #elif defined(__WXMAC__)
     typedef CFragConnectionID wxDllType;
 #else
-    #error "wxLibrary can't be compiled on this platform, sorry."
+#   error "wxLibrary can't be compiled on this platform, sorry."
 #endif // OS
 
 // defined in windows.h
 #ifdef LoadLibrary
-    #undef LoadLibrary
+#   undef LoadLibrary
 #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);
+   /** 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
 // ----------------------------------------------------------------------------
@@ -53,7 +95,7 @@ public:
     wxHashTable classTable;
 
 public:
-    wxLibrary(void *handle);
+    wxLibrary(wxDllType handle);
     ~wxLibrary();
 
     // Get a symbol from the dynamic library
@@ -68,6 +110,8 @@ protected:
     wxDllType m_handle;
 };
 
+
+
 // ----------------------------------------------------------------------------
 // wxLibraries
 // ----------------------------------------------------------------------------
@@ -103,4 +147,6 @@ wxClassInfo *wxGetClassFirst() { \
   return wxClassInfo::GetFirst(); \
 }
 
+#endif // wxUSE_DYNLIB_CLASS
+
 #endif // _WX_DYNLIB_H__