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/* <auto_header>
* <FILENAME>
*
* INTEL CONFIDENTIAL
* Copyright © 2011 Intel
* Corporation All Rights Reserved.
*
* The source code contained or described herein and all documents related to
* the source code ("Material") are owned by Intel Corporation or its suppliers
* or licensors. Title to the Material remains with Intel Corporation or its
* suppliers and licensors. The Material contains trade secrets and proprietary
* and confidential information of Intel or its suppliers and licensors. The
* Material is protected by worldwide copyright and trade secret laws and
* treaty provisions. No part of the Material may be used, copied, reproduced,
* modified, published, uploaded, posted, transmitted, distributed, or
* disclosed in any way without Intel’s prior express written permission.
*
* No license under any patent, copyright, trade secret or other intellectual
* property right is granted to or conferred upon you by disclosure or delivery
* of the Materials, either expressly, by implication, inducement, estoppel or
* otherwise. Any license under such intellectual property rights must be
* express and approved by Intel in writing.
*
* AUTHOR: Patrick Benavoli (patrickx.benavoli@intel.com)
* CREATED: 2011-06-01
* UPDATED: 2011-07-27
*
*
* </auto_header>
*/
#include <dlfcn.h>
#include <dirent.h>
#include "SystemClass.h"
#include "SubsystemLibrary.h"
#include "AutoLog.h"
#define base CConfigurableElement
// Used by subsystem plugins
typedef void (*GetSusbystemBuilder)(CSubsystemLibrary*);
CSystemClass::CSystemClass(const string& strName) : base(strName), _pSubsystemLibrary(new CSubsystemLibrary)
{
}
CSystemClass::~CSystemClass()
{
delete _pSubsystemLibrary;
}
bool CSystemClass::childrenAreDynamic() const
{
return true;
}
string CSystemClass::getKind() const
{
return "SystemClass";
}
bool CSystemClass::loadSubsystems(string& strError, const vector<string>& astrPluginFolderPaths)
{
CAutoLog autoLlog(this, "Loading subsystem plugins");
// Plugin list
vector<string> astrPluginFiles;
uint32_t uiFolderLocation;
for (uiFolderLocation = 0; uiFolderLocation < astrPluginFolderPaths.size(); uiFolderLocation++) {
// Folder for current SystemClass
string strPluginPath = astrPluginFolderPaths[uiFolderLocation] + "/" + getName() + "/";
// Get plugin list
getPluginFiles(strPluginPath, astrPluginFiles);
}
// Check at least one subsystem plugin available
if (!astrPluginFiles.size()) {
// No plugin found?
strError = "No subsystem plugin found";
}
// Actually load plugins
uint32_t uiPlugin;
// Start clean
_pSubsystemLibrary->clean();
for (uiPlugin = 0; uiPlugin < astrPluginFiles.size(); uiPlugin++) {
string strPluginFileName = astrPluginFiles[uiPlugin];
log("Loading subsystem plugin path \"%s\"", strPluginFileName.c_str());
void* lib_handle = dlopen(strPluginFileName.c_str(), RTLD_LAZY);
if (!lib_handle) {
// Return error
const char* pcError = dlerror();
if (pcError) {
strError = pcError;
} else {
strError = "Unable to load subsystem plugin " + strPluginFileName;
}
_pSubsystemLibrary->clean();
return false;
}
GetSusbystemBuilder pfnGetSusbystemBuilder = (GetSusbystemBuilder)dlsym(lib_handle, "getSusbystemBuilder");
if (!pfnGetSusbystemBuilder) {
strError = "Subsystem plugin " + strPluginFileName + " does not contain getSusbystemBuilder symbol.";
_pSubsystemLibrary->clean();
return false;
}
// Fill library
pfnGetSusbystemBuilder(_pSubsystemLibrary);
}
return true;
}
bool CSystemClass::getPluginFiles(const string& strPluginPath, vector<string>& astrPluginFiles) const
{
log("Seeking subsystem plugins from folder \"%s\"", strPluginPath.c_str());
DIR *dirp;
struct dirent *dp;
if ((dirp = opendir(strPluginPath.c_str())) == NULL) {
return false;
}
const string strPluginPattern("-subsystem.so");
// Parse it and load plugins
while ((dp = readdir(dirp)) != NULL) {
string strFileName(dp->d_name);
// Check file name ends with "-susbsystem.so"
size_t uiPatternPos = strFileName.rfind(strPluginPattern, -1);
if (uiPatternPos != (size_t)-1 && uiPatternPos == strFileName.size() - strPluginPattern.size()) {
// Found plugin
astrPluginFiles.push_back(strPluginPath + strFileName);
}
}
// Close plugin folder
closedir(dirp);
return true;
}
const CSubsystemLibrary* CSystemClass::getSubsystemLibrary() const
{
return _pSubsystemLibrary;
}
bool CSystemClass::init(string& strError)
{
return base::init(strError);
}
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