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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 Lesser 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include "ModuleManager.h"
#include "Application.h"
#include <Core/ConfigEntry.h>
#include <Core/ConfigManager.h>
#include <modules/modules.h>
#include <boost/thread/locks.hpp>
#ifndef _WIN32
# include <dlfcn.h>
#endif
namespace Mad {
namespace Common {
const ModuleManager::ModuleHandle ModuleManager::STATIC_MODULE = 0;
ModuleManager::ModuleManager(Application *application0) : application(application0) {
application->getConfigManager()->registerConfigurable(this);
}
ModuleManager::~ModuleManager() {
application->getConfigManager()->unregisterConfigurable(this);
boost::shared_lock<boost::shared_mutex> lock(mutex);
while(!moduleOrder.empty()) {
std::string mod = moduleOrder.top();
lock.unlock();
unloadModule(mod);
lock.lock();
moduleOrder.pop();
}
}
bool ModuleManager::handleConfigEntry(const Core::ConfigEntry &entry, bool handled) {
if(handled)
return false;
if(entry[0].getKey().matches("LoadModule") && entry[1].empty()) {
if(!loadModule(entry[0][0].c_str()))
application->logf(Core::LoggerBase::LOG_ERROR, "Can't load module '%s'.", entry[0][0].c_str());
return true;
}
return false;
}
bool ModuleManager::loadModule(const std::string &name) {
{
boost::shared_lock<boost::shared_mutex> lock(mutex);
if(modules.find(name) != modules.end())
return true;
}
ModuleHandle handle = STATIC_MODULE;
Module *mod = Modules::loadStaticModule(application, name);
std::string libname = name + MODULE_SUFFIX;
if(!mod) {
#ifdef WIN32
handle = LoadLibrary(libname.c_str());
#else
handle = dlopen(libname.c_str(), RTLD_NOW | RTLD_GLOBAL);
#endif
if(!handle) {
#ifdef WIN32
application->logf(Core::LoggerBase::LOG_VERBOSE, "loadModule: Can't open module: Error %u", GetLastError());
#else
application->log(Core::LoggerBase::LOG_VERBOSE, std::string("loadModule: Can't open module: ") + std::string(dlerror()));
#endif
return false;
}
ModuleLoadFunc loader;
std::string loadername = name + "_create";
#ifdef WIN32
loader = (ModuleLoadFunc)GetProcAddress(handle, loadername.c_str());
#else
*(void**)&loader = dlsym(handle, loadername.c_str());
#endif
if(!loader) {
application->log(Core::LoggerBase::LOG_VERBOSE, "loadModule: Can't open module: Invalid module");
return false;
}
Module *mod = loader(application);
if(!mod) {
application->log(Core::LoggerBase::LOG_VERBOSE, "loadModule: Can't open module: Internal module error");
return false;
}
}
modules.insert(std::make_pair(name, std::make_pair(handle, mod))).first;
moduleOrder.push(name);
return true;
}
void ModuleManager::unloadModule(const std::string &name) {
boost::upgrade_lock<boost::shared_mutex> lock(mutex);
std::map<std::string, std::pair<ModuleHandle, Module*> >::iterator mod = modules.find(name);
if(mod == modules.end())
return;
boost::upgrade_to_unique_lock<boost::shared_mutex> upgradeLock(lock);
delete mod->second.second;
if(mod->second.first != STATIC_MODULE) {
#ifdef WIN32
FreeLibrary(mod->second.first);
#else
dlclose(mod->second.first);
#endif
}
modules.erase(mod);
}
}
}
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