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/* Copyright (c) 2017, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of The Linux Foundation, nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#define LOG_TAG "DataItemsFactoryProxy"
#include <dlfcn.h>
#include <DataItemId.h>
#include <IDataItemCore.h>
#include <DataItemsFactoryProxy.h>
#include <loc_pla.h>
#include <log_util.h>
namespace loc_core
{
void* DataItemsFactoryProxy::dataItemLibHandle = NULL;
get_concrete_data_item_fn* DataItemsFactoryProxy::getConcreteDIFunc = NULL;
IDataItemCore* DataItemsFactoryProxy::createNewDataItem(DataItemId id)
{
IDataItemCore *mydi = nullptr;
if (NULL != getConcreteDIFunc) {
mydi = (*getConcreteDIFunc)(id);
}
else {
// first call to this function, symbol not yet loaded
if (NULL == dataItemLibHandle) {
LOC_LOGD("Loaded library %s",DATA_ITEMS_LIB_NAME);
dataItemLibHandle = dlopen(DATA_ITEMS_LIB_NAME, RTLD_NOW);
if (NULL == dataItemLibHandle) {
// dlopen failed.
const char * err = dlerror();
if (NULL == err)
{
err = "Unknown";
}
LOC_LOGE("%s:%d]: failed to load library %s; error=%s",
__func__, __LINE__, DATA_ITEMS_LIB_NAME, err);
}
}
// load sym - if dlopen handle is obtained and symbol is not yet obtained
if (NULL != dataItemLibHandle) {
getConcreteDIFunc = (get_concrete_data_item_fn * )
dlsym(dataItemLibHandle, DATA_ITEMS_GET_CONCRETE_DI);
if (NULL != getConcreteDIFunc) {
LOC_LOGD("Loaded function %s : %p",DATA_ITEMS_GET_CONCRETE_DI,getConcreteDIFunc);
mydi = (*getConcreteDIFunc)(id);
}
else {
// dlysm failed.
const char * err = dlerror();
if (NULL == err)
{
err = "Unknown";
}
LOC_LOGE("%s:%d]: failed to find symbol %s; error=%s",
__func__, __LINE__, DATA_ITEMS_GET_CONCRETE_DI, err);
}
}
}
return mydi;
}
void DataItemsFactoryProxy::closeDataItemLibraryHandle()
{
if (NULL != dataItemLibHandle) {
dlclose(dataItemLibHandle);
dataItemLibHandle = NULL;
}
}
} // namespace loc_core
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