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https://github.com/kidfromjupiter/nearby.git
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58 lines
1.6 KiB
C++
58 lines
1.6 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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#ifndef PLATFORM_IMPL_WINDOWS_COUNT_DOWN_LATCH_H_
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#define PLATFORM_IMPL_WINDOWS_COUNT_DOWN_LATCH_H_
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#include <windows.h>
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#include <synchapi.h>
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#include "platform/api/count_down_latch.h"
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namespace location {
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namespace nearby {
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namespace windows {
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// A synchronization aid that allows one or more threads to wait until a set of
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// operations being performed in other threads completes.
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//
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// https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CountDownLatch.html
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class CountDownLatch : public api::CountDownLatch {
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public:
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CountDownLatch(int count);
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~CountDownLatch() override {
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if (h_count_down_latch_event_ != NULL) {
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CloseHandle(h_count_down_latch_event_);
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h_count_down_latch_event_ = NULL;
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}
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}
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Exception Await() override;
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ExceptionOr<bool> Await(absl::Duration timeout) override;
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void CountDown() override;
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private:
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HANDLE h_count_down_latch_event_ = NULL;
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uint32_t count_;
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};
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} // namespace windows
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} // namespace nearby
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} // namespace location
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#endif // PLATFORM_IMPL_WINDOWS_COUNT_DOWN_LATCH_H_
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