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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#if defined(DYNAMIC_MODULES) && defined(SDL_BACKEND)
#include "backends/plugins/sdl/sdl-provider.h"
#include "backends/plugins/dynamic-plugin.h"
#include "SDL.h"
#include "SDL_loadso.h"
class SDLPlugin : public DynamicPlugin {
protected:
void *_dlHandle;
Common::String _filename;
virtual VoidFunc findSymbol(const char *symbol) {
void *func = SDL_LoadFunction(_dlHandle, symbol);
if (!func)
warning("Failed loading symbol '%s' from plugin '%s' (%s)", symbol, _filename.c_str(), SDL_GetError());
// FIXME HACK: This is a HACK to circumvent a clash between the ISO C++
// standard and POSIX: ISO C++ disallows casting between function pointers
// and data pointers, but dlsym always returns a void pointer. For details,
// see e.g. <http://www.trilithium.com/johan/2004/12/problem-with-dlsym/>.
assert(sizeof(VoidFunc) == sizeof(func));
VoidFunc tmp;
memcpy(&tmp, &func, sizeof(VoidFunc));
return tmp;
}
public:
SDLPlugin(const Common::String &filename)
: _dlHandle(0), _filename(filename) {}
bool loadPlugin() {
assert(!_dlHandle);
_dlHandle = SDL_LoadObject(_filename.c_str());
if (!_dlHandle) {
warning("Failed loading plugin '%s' (%s)", _filename.c_str(), SDL_GetError());
return false;
}
return DynamicPlugin::loadPlugin();
}
void unloadPlugin() {
DynamicPlugin::unloadPlugin();
if (_dlHandle) {
SDL_UnloadObject(_dlHandle);
_dlHandle = 0;
}
}
};
Plugin* SDLPluginProvider::createPlugin(const Common::String &filename) const {
return new SDLPlugin(filename);
}
#endif // defined(DYNAMIC_MODULES) && defined(SDL_BACKEND)
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