mirror of
https://github.com/kidfromjupiter/nearby.git
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42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "internal/platform/implementation/apple/count_down_latch.h"
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#include "absl/synchronization/mutex.h"
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#include "absl/time/time.h"
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#include "internal/platform/exception.h"
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namespace nearby {
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namespace apple {
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Exception CountDownLatch::Await() {
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absl::MutexLock lock(&mutex_, absl::Condition(IsZeroOrNegative, &count_));
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return {Exception::kSuccess};
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}
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ExceptionOr<bool> CountDownLatch::Await(absl::Duration timeout) {
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bool condition = mutex_.LockWhenWithTimeout(
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absl::Condition(IsZeroOrNegative, &count_), timeout);
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mutex_.Unlock();
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return ExceptionOr<bool>(condition);
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}
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void CountDownLatch::CountDown() {
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absl::MutexLock lock(&mutex_);
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count_--;
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}
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} // namespace apple
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} // namespace nearby
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