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/**
* @file loader.cpp
*
* @brief Settings plugin loader implementation.
*
* @author Ossama Othman @<ossama.othman@@intel.com@>
*
* @copyright @par
* Copyright 2012, 2013 Intel Corporation All Rights Reserved.
* @par
* This library 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;
* version 2.1 of the License.
* @par
* This library 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.
* @par
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include "loader.hpp"
#include "manager.hpp"
#include <settingsd/plugin.hpp>
#include <settingsd/registrar.hpp>
#include <settingsd/event_callback.hpp>
#include <system_error>
#include <dlfcn.h>
#ifdef __GNUC__
/// We use this macro to silence @c -pedantic warnings from g++ that
/// there is no way to properly fix.
# define IVI_SETTINGS_EXTENSION __extension__
#else
# define IVI_SETTINGS_EXTENSION
#endif /* __GNUC__ */
ivi::settings::loader::loader(std::string const & plugin_name,
ivi::settings::manager & mgr)
: handle_(dlopen(plugin_name.c_str(), RTLD_LAZY | RTLD_GLOBAL))
{
if (handle_ == nullptr) {
throw std::system_error(std::error_code(), dlerror());
}
// Reset any lingering dynamic linking related errors (see
// dlopen(3)).
dlerror();
// Retrieve the settings factory and destroyer functions.
typedef bool(*factory_type)(registrar &, event_callback const &);
factory_type const register_settings =
IVI_SETTINGS_EXTENSION reinterpret_cast<factory_type>(
dlsym(handle_,
"register_settings"));
if (register_settings == nullptr)
throw std::system_error(std::error_code(), dlerror());
// Now create the underlying settings implementation.
registrar r(mgr);
event_callback e(mgr);
if (!register_settings(r, e))
throw std::runtime_error("Unable to make \""
+ plugin_name
+ "\" settings plugin");
}
ivi::settings::loader::~loader()
{
dlclose(handle_);
}
// Local Variables:
// mode:c++
// c-basic-offset:2
// indent-tabs-mode: nil
// End:
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