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/*
* ModuleManager.cpp
*
* Copyright (C) 2008 Matthias Schiffer <matthias@gamezock.de>
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "ModuleManager.h"
#include "ConfigEntry.h"
#include "Logger.h"
extern const lt_dlsymlist lt_preloaded_symbols[];
namespace Mad {
namespace Common {
ModuleManager ModuleManager::moduleManager;
int ModuleManager::preopenCallback(lt_dlhandle handle) {
moduleManager.modules.insert(std::make_pair(lt_dlgetinfo(handle)->name, std::make_pair(handle, false)));
return 0;
}
void ModuleManager::doInit() {
lt_dlinit();
lt_dlpreload_default(lt_preloaded_symbols);
lt_dlpreload(0);
lt_dlpreload_open("@PROGRAM@", &ModuleManager::preopenCallback);
}
void ModuleManager::doDeinit() {
while(!moduleOrder.empty()) {
unloadModule(moduleOrder.top());
moduleOrder.pop();
}
lt_dlexit();
}
bool ModuleManager::handleConfigEntry(const ConfigEntry &entry, bool handled) {
if(handled)
return false;
if(entry[0].getKey().matches("LoadModule")) {
if(!loadModule(entry[0][0].c_str()))
Logger::logf(Logger::ERROR, "Can't load module '%s'.", entry[0][0].c_str());
return true;
}
return false;
}
lt_dlhandle ModuleManager::loadModule(const std::string &name) {
std::map<std::string, std::pair<lt_dlhandle, bool> >::iterator mod = modules.find(name);
if(mod == modules.end()) {
lt_dlhandle handle = lt_dlopen((name + ".la").c_str());
if(!handle)
return 0;
mod = modules.insert(std::make_pair(lt_dlgetinfo(handle)->name, std::make_pair(handle, false))).first;
}
if(!mod->second.second) {
void (*initFun)() = (void(*)())lt_dlsym(mod->second.first, "init");
if(initFun)
(*initFun)();
mod->second.second = true;
moduleOrder.push(name);
}
return mod->second.first;
}
void ModuleManager::unloadModule(const std::string &name) {
void (*deinitFun)();
deinitFun = (void(*)())lt_dlsym(modules[name].first, "deinit");
if(deinitFun)
(*deinitFun)();
lt_dlclose(modules[name].first);
modules.erase(name);
}
}
}
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