1 /* Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
2 *
3 * Redistribution and use in source and binary forms, with or without
4 * modification, are permitted provided that the following conditions are
5 * met:
6 * * Redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer.
8 * * Redistributions in binary form must reproduce the above
9 * copyright notice, this list of conditions and the following
10 * disclaimer in the documentation and/or other materials provided
11 * with the distribution.
12 * * Neither the name of The Linux Foundation, nor the names of its
13 * contributors may be used to endorse or promote products derived
14 * from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
23 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
25 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
26 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 */
29 #define LOG_TAG "DataItemsFactoryProxy"
30
31 #include <dlfcn.h>
32 #include <DataItemId.h>
33 #include <IDataItemCore.h>
34 #include <DataItemsFactoryProxy.h>
35 #include <loc_pla.h>
36 #include <log_util.h>
37 #include "loc_misc_utils.h"
38
39 namespace loc_core
40 {
41 void* DataItemsFactoryProxy::dataItemLibHandle = NULL;
42 get_concrete_data_item_fn* DataItemsFactoryProxy::getConcreteDIFunc = NULL;
43
createNewDataItem(DataItemId id)44 IDataItemCore* DataItemsFactoryProxy::createNewDataItem(DataItemId id)
45 {
46 IDataItemCore *mydi = nullptr;
47
48 if (NULL != getConcreteDIFunc) {
49 mydi = (*getConcreteDIFunc)(id);
50 }
51 else {
52 getConcreteDIFunc = (get_concrete_data_item_fn * )
53 dlGetSymFromLib(dataItemLibHandle, DATA_ITEMS_LIB_NAME, DATA_ITEMS_GET_CONCRETE_DI);
54
55 if (NULL != getConcreteDIFunc) {
56 LOC_LOGd("Loaded function %s : %p", DATA_ITEMS_GET_CONCRETE_DI, getConcreteDIFunc);
57 mydi = (*getConcreteDIFunc)(id);
58 }
59 else {
60 // dlysm failed.
61 const char * err = dlerror();
62 if (NULL == err)
63 {
64 err = "Unknown";
65 }
66 LOC_LOGe("failed to find symbol %s; error=%s", DATA_ITEMS_GET_CONCRETE_DI, err);
67 }
68 }
69 return mydi;
70 }
71
closeDataItemLibraryHandle()72 void DataItemsFactoryProxy::closeDataItemLibraryHandle()
73 {
74 if (NULL != dataItemLibHandle) {
75 dlclose(dataItemLibHandle);
76 dataItemLibHandle = NULL;
77 }
78 }
79
80 } // namespace loc_core
81
82
83