mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-15 15:16:12 -04:00
51 lines
1.6 KiB
C++
51 lines
1.6 KiB
C++
// Copyright 2020 Google LLC
|
|
//
|
|
// 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
|
|
//
|
|
// https://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 PLATFORM_IMPL_APPLE_COUNT_DOWN_LATCH_H_
|
|
#define PLATFORM_IMPL_APPLE_COUNT_DOWN_LATCH_H_
|
|
|
|
#include "absl/base/thread_annotations.h"
|
|
#include "absl/synchronization/mutex.h"
|
|
#include "absl/time/time.h"
|
|
#include "internal/platform/exception.h"
|
|
#include "internal/platform/implementation/count_down_latch.h"
|
|
|
|
namespace nearby {
|
|
namespace apple {
|
|
|
|
// Concrete CountDownLatch implementation.
|
|
class CountDownLatch : public api::CountDownLatch {
|
|
public:
|
|
explicit CountDownLatch(int count) : count_(count) {}
|
|
~CountDownLatch() override = default;
|
|
|
|
CountDownLatch(const CountDownLatch&) = delete;
|
|
CountDownLatch& operator=(const CountDownLatch&) = delete;
|
|
|
|
Exception Await() override;
|
|
ExceptionOr<bool> Await(absl::Duration timeout) override;
|
|
void CountDown() override;
|
|
|
|
private:
|
|
static bool IsZeroOrNegative(int* count) { return 0 >= *count; }
|
|
|
|
absl::Mutex mutex_;
|
|
int count_ ABSL_GUARDED_BY(mutex_);
|
|
};
|
|
|
|
} // namespace apple
|
|
} // namespace nearby
|
|
|
|
#endif // PLATFORM_IMPL_APPLE_COUNT_DOWN_LATCH_H_
|