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#include <utils/Log.h>
20#include <media/stagefright/foundation/ADebug.h>
21
22#include <dlfcn.h>
23
24#include "SharedLibrary.h"
25
26namespace android {
27
28    SharedLibrary::SharedLibrary(const String8 &path) {
29        mLibHandle = dlopen(path.string(), RTLD_NOW);
30    }
31
32    SharedLibrary::~SharedLibrary() {
33        if (mLibHandle != NULL) {
34            dlclose(mLibHandle);
35            mLibHandle = NULL;
36        }
37    }
38
39    bool SharedLibrary::operator!() const {
40        return mLibHandle == NULL;
41    }
42
43    void *SharedLibrary::lookup(const char *symbol) const {
44        if (!mLibHandle) {
45            return NULL;
46        }
47        return dlsym(mLibHandle, symbol);
48    }
49
50    const char *SharedLibrary::lastError() const {
51        const char *error = dlerror();
52        return error ? error : "No errors or unknown error";
53    }
54
55};
56