1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17
18#include "SharedLibrary.h"
19
20#include <dlfcn.h>
21
22namespace android {
23namespace hardware {
24namespace drm {
25namespace V1_0 {
26namespace helper {
27
28SharedLibrary::SharedLibrary(const String8& path) {
29    mLibHandle = dlopen(path.string(), RTLD_NOW);
30}
31
32SharedLibrary::~SharedLibrary() {
33    if (mLibHandle != NULL) {
34        dlclose(mLibHandle);
35        mLibHandle = NULL;
36    }
37}
38
39bool SharedLibrary::operator!() const {
40    return mLibHandle == NULL;
41}
42
43void* SharedLibrary::lookup(const char* symbol) const {
44    if (!mLibHandle) {
45        return NULL;
46    }
47
48    // Clear last error before we load the symbol again,
49    // in case the caller didn't retrieve it.
50    (void)dlerror();
51    return dlsym(mLibHandle, symbol);
52}
53
54const char* SharedLibrary::lastError() const {
55    const char* error = dlerror();
56    return error ? error : "No errors or unknown error";
57}
58
59}
60}
61}
62}
63} // namespace android
64