| /* 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 |
| |
| |