54 lines
1.4 KiB
C++
54 lines
1.4 KiB
C++
/*
|
|
* Copyright 2022 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <log/log.h>
|
|
#include <utils/Mutex.h>
|
|
|
|
namespace android {
|
|
|
|
struct SCOPED_CAPABILITY ConditionalLock {
|
|
ConditionalLock(Mutex& mutex, bool lock) ACQUIRE(mutex) : mutex(mutex), lock(lock) {
|
|
if (lock) mutex.lock();
|
|
}
|
|
|
|
~ConditionalLock() RELEASE() {
|
|
if (lock) mutex.unlock();
|
|
}
|
|
|
|
Mutex& mutex;
|
|
const bool lock;
|
|
};
|
|
|
|
struct SCOPED_CAPABILITY TimedLock {
|
|
TimedLock(Mutex& mutex, nsecs_t timeout, const char* whence) ACQUIRE(mutex)
|
|
: mutex(mutex), status(mutex.timedLock(timeout)) {
|
|
ALOGE_IF(!locked(), "%s timed out locking: %s (%d)", whence, strerror(-status), status);
|
|
}
|
|
|
|
~TimedLock() RELEASE() {
|
|
if (locked()) mutex.unlock();
|
|
}
|
|
|
|
bool locked() const { return status == NO_ERROR; }
|
|
|
|
Mutex& mutex;
|
|
const status_t status;
|
|
};
|
|
|
|
} // namespace android
|