1/*
2 * Copyright (C) 2015 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 ATRACE_TAG ATRACE_TAG_GRAPHICS
18#define LOG_TAG "hwc-drm-auto-lock"
19
20#include "autolock.h"
21
22#include <errno.h>
23#include <pthread.h>
24
25#include <cutils/log.h>
26
27namespace android {
28
29int AutoLock::Lock() {
30  if (locked_) {
31    ALOGE("Invalid attempt to double lock AutoLock %s", name_);
32    return -EINVAL;
33  }
34  int ret = pthread_mutex_lock(mutex_);
35  if (ret) {
36    ALOGE("Failed to acquire %s lock %d", name_, ret);
37    return ret;
38  }
39  locked_ = true;
40  return 0;
41}
42
43int AutoLock::Unlock() {
44  if (!locked_) {
45    ALOGE("Invalid attempt to unlock unlocked AutoLock %s", name_);
46    return -EINVAL;
47  }
48  int ret = pthread_mutex_unlock(mutex_);
49  if (ret) {
50    ALOGE("Failed to release %s lock %d", name_, ret);
51    return ret;
52  }
53  locked_ = false;
54  return 0;
55}
56}
57