1/*
2 * Copyright (C) 2013 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//#define LOG_NDEBUG 0
18#define LOG_TAG "Drm"
19
20#include <dlfcn.h>
21#include <media/stagefright/foundation/ADebug.h>
22#include <media/SharedLibrary.h>
23#include <utils/Log.h>
24
25namespace android {
26
27    SharedLibrary::SharedLibrary(const String8 &path) {
28        mLibHandle = dlopen(path.string(), RTLD_NOW);
29    }
30
31    SharedLibrary::~SharedLibrary() {
32        if (mLibHandle != NULL) {
33            dlclose(mLibHandle);
34            mLibHandle = NULL;
35        }
36    }
37
38    bool SharedLibrary::operator!() const {
39        return mLibHandle == NULL;
40    }
41
42    void *SharedLibrary::lookup(const char *symbol) const {
43        if (!mLibHandle) {
44            return NULL;
45        }
46        return dlsym(mLibHandle, symbol);
47    }
48
49    const char *SharedLibrary::lastError() const {
50        const char *error = dlerror();
51        return error ? error : "No errors or unknown error";
52    }
53
54};
55