a9939e9a23
Putting libmemunreachable in the global C++ namespace was an oversight, move it into namespace android. Test: m -j checkbuild Change-Id: I0799906f6463178cb04a719bb4054cad33a50dbe
60 lines
1.4 KiB
C++
60 lines
1.4 KiB
C++
/*
|
|
* Copyright (C) 2016 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.
|
|
*/
|
|
|
|
#ifndef LIBMEMUNREACHABLE_SEMAPHORE_H_
|
|
#define LIBMEMUNREACHABLE_SEMAPHORE_H_
|
|
|
|
#include <chrono>
|
|
#include <mutex>
|
|
|
|
#include "android-base/macros.h"
|
|
|
|
namespace android {
|
|
|
|
class Semaphore {
|
|
public:
|
|
explicit Semaphore(int count = 0) : count_(count) {}
|
|
~Semaphore() = default;
|
|
|
|
void Wait(std::chrono::milliseconds ms) {
|
|
std::unique_lock<std::mutex> lk(m_);
|
|
cv_.wait_for(lk, ms, [&] {
|
|
if (count_ > 0) {
|
|
count_--;
|
|
return true;
|
|
}
|
|
return false;
|
|
});
|
|
}
|
|
void Post() {
|
|
{
|
|
std::lock_guard<std::mutex> lk(m_);
|
|
count_++;
|
|
}
|
|
cv_.notify_one();
|
|
}
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(Semaphore);
|
|
|
|
int count_;
|
|
std::mutex m_;
|
|
std::condition_variable cv_;
|
|
};
|
|
|
|
} // namespace android
|
|
|
|
#endif // LIBMEMUNREACHABLE_SEMAPHORE_H_
|