/*
|
* analyzer_loader.cpp - analyzer loader
|
*
|
* Copyright (c) 2015 Intel Corporation
|
*
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
* you may not use this file except in compliance with the License.
|
* You may obtain a copy of the License at
|
*
|
* http://www.apache.org/licenses/LICENSE-2.0
|
*
|
* Unless required by applicable law or agreed to in writing, software
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
* See the License for the specific language governing permissions and
|
* limitations under the License.
|
*
|
* Author: Wind Yuan <feng.yuan@intel.com>
|
*/
|
|
#include "analyzer_loader.h"
|
#include <dlfcn.h>
|
|
namespace XCam {
|
|
AnalyzerLoader::AnalyzerLoader (const char *lib_path, const char *symbol)
|
: _handle (NULL)
|
{
|
XCAM_ASSERT (lib_path);
|
_path = strndup (lib_path, XCAM_MAX_STR_SIZE);
|
XCAM_ASSERT (symbol);
|
_symbol = strndup (symbol, XCAM_MAX_STR_SIZE);
|
}
|
|
AnalyzerLoader::~AnalyzerLoader ()
|
{
|
close_handle ();
|
if (_path)
|
xcam_free (_path);
|
if (_symbol)
|
xcam_free (_symbol);
|
}
|
|
void *
|
AnalyzerLoader::load_library (const char *lib_path)
|
{
|
void *desc = NULL;
|
|
void *handle = open_handle (lib_path);
|
//XCAM_ASSERT (handle);
|
if (!handle) {
|
XCAM_LOG_WARNING ("open dynamic lib:%s failed", XCAM_STR (lib_path));
|
return NULL;
|
}
|
desc = load_symbol (handle);
|
if (!desc) {
|
XCAM_LOG_WARNING ("get symbol(%s) from lib:%s failed", _symbol, XCAM_STR (lib_path));
|
close_handle ();
|
return NULL;
|
}
|
|
XCAM_LOG_DEBUG ("got symbols(%s) from lib(%s)", _symbol, XCAM_STR (lib_path));
|
return desc;
|
}
|
|
void*
|
AnalyzerLoader::open_handle (const char *lib_path)
|
{
|
void *handle = NULL;
|
|
if (_handle != NULL)
|
return _handle;
|
|
handle = dlopen (lib_path, RTLD_LAZY);
|
if (!handle) {
|
XCAM_LOG_DEBUG (
|
"open user-defined lib(%s) failed, reason:%s",
|
XCAM_STR (lib_path), dlerror ());
|
return NULL;
|
}
|
_handle = handle;
|
return handle;
|
}
|
|
void *
|
AnalyzerLoader::get_symbol (void* handle)
|
{
|
void *desc = NULL;
|
|
XCAM_ASSERT (handle);
|
XCAM_ASSERT (_symbol);
|
desc = (void *)dlsym (handle, _symbol);
|
if (!desc) {
|
XCAM_LOG_DEBUG ("get symbol(%s) failed from lib(%s), reason:%s", _symbol, XCAM_STR (_path), dlerror ());
|
return NULL;
|
}
|
|
return desc;
|
}
|
|
bool
|
AnalyzerLoader::close_handle ()
|
{
|
if (!_handle)
|
return true;
|
dlclose (_handle);
|
_handle = NULL;
|
return true;
|
}
|
|
};
|
