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// 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_API_COUNT_DOWN_LATCH_H_
#define PLATFORM_API_COUNT_DOWN_LATCH_H_
#include <cstdint>
#include "absl/time/time.h"
#include "internal/platform/exception.h"
namespace location {
namespace nearby {
namespace api {
// A synchronization aid that allows one or more threads to wait until a set of
// operations being performed in other threads completes.
//
// https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CountDownLatch.html
class CountDownLatch {
public:
virtual ~CountDownLatch() = default;
virtual Exception Await() = 0; // throws Exception::kInterrupted
virtual ExceptionOr<bool> Await(
absl::Duration timeout) = 0; // throws Exception::kInterrupted
virtual void CountDown() = 0;
};
} // namespace api
} // namespace nearby
} // namespace location
#endif // PLATFORM_API_COUNT_DOWN_LATCH_H_
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