| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define ATRACE_TAG ATRACE_TAG_GRAPHICS |
| #define LOG_TAG "hwc-drm-auto-lock" |
| |
| #include "autolock.h" |
| |
| #include <pthread.h> |
| |
| #include <cerrno> |
| |
| #include "utils/log.h" |
| |
| namespace android { |
| |
| int AutoLock::Lock() { |
| if (locked_) { |
| ALOGE("Invalid attempt to double lock AutoLock %s", name_); |
| return -EINVAL; |
| } |
| int ret = pthread_mutex_lock(mutex_); |
| if (ret != 0) { |
| ALOGE("Failed to acquire %s lock %d", name_, ret); |
| return ret; |
| } |
| locked_ = true; |
| return 0; |
| } |
| |
| int AutoLock::Unlock() { |
| if (!locked_) { |
| ALOGE("Invalid attempt to unlock unlocked AutoLock %s", name_); |
| return -EINVAL; |
| } |
| int ret = pthread_mutex_unlock(mutex_); |
| if (ret != 0) { |
| ALOGE("Failed to release %s lock %d", name_, ret); |
| return ret; |
| } |
| locked_ = false; |
| return 0; |
| } |
| } // namespace android |