59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
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// Copyright 2014 The Crashpad Authors. All rights reserved.
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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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// http://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 "util/synchronization/semaphore.h"
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#include <cmath>
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#include <limits>
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#include <ostream>
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#include "base/check_op.h"
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namespace crashpad {
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Semaphore::Semaphore(int value)
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: semaphore_(CreateSemaphore(nullptr,
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value,
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std::numeric_limits<LONG>::max(),
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nullptr)) {
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PCHECK(semaphore_) << "CreateSemaphore";
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}
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Semaphore::~Semaphore() {
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PCHECK(CloseHandle(semaphore_));
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}
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void Semaphore::Wait() {
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PCHECK(WaitForSingleObject(semaphore_, INFINITE) == WAIT_OBJECT_0);
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}
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bool Semaphore::TimedWait(double seconds) {
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DCHECK_GE(seconds, 0.0);
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if (std::isinf(seconds)) {
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Wait();
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return true;
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}
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DWORD rv = WaitForSingleObject(semaphore_, static_cast<DWORD>(seconds * 1E3));
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PCHECK(rv == WAIT_OBJECT_0 || rv == WAIT_TIMEOUT) << "WaitForSingleObject";
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return rv == WAIT_OBJECT_0;
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}
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void Semaphore::Signal() {
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PCHECK(ReleaseSemaphore(semaphore_, 1, nullptr));
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}
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} // namespace crashpad
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