Vyacheslav Egorov
e105029f62
This CL also removes ability to assign names to mutexes which was
added in c25ebfff96 but did not yield
any interesting data.
TEST=ci
CoreLibraryReviewExempt: Changes to dart:concurrent only.
Cq-Include-Trybots: luci.dart.try:vm-fuchsia-release-x64-try,vm-win-debug-x64-try,vm-win-release-x64-try,vm-aot-linux-product-x64-try
Change-Id: Id41e1d29832f6008e02f0a571ee67564e1a84224
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/375300
Reviewed-by: Martin Kustermann <kustermann@google.com>
94 lines
2.5 KiB
C++
94 lines
2.5 KiB
C++
// Copyright (c) 2024, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "platform/globals.h" // NOLINT
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#if defined(DART_HOST_OS_WINDOWS) && !defined(DART_USE_ABSL)
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#include "platform/synchronization.h"
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#include <process.h> // NOLINT
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#include "platform/address_sanitizer.h"
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#include "platform/assert.h"
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#include "platform/safe_stack.h"
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namespace dart {
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Mutex::Mutex() {
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InitializeSRWLock(&mutex_);
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}
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Mutex::~Mutex() {}
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void Mutex::Lock() {
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DEBUG_ASSERT(!DisallowMutexLockingScope::is_active());
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AcquireSRWLockExclusive(&mutex_);
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owner_.Acquire();
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}
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bool Mutex::TryLock() {
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DEBUG_ASSERT(!DisallowMutexLockingScope::is_active());
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if (TryAcquireSRWLockExclusive(&mutex_) != 0) {
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owner_.Acquire();
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return true;
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}
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return false;
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}
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void Mutex::Unlock() {
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owner_.Release();
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ReleaseSRWLockExclusive(&mutex_);
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}
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ConditionVariable::ConditionVariable() {
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InitializeConditionVariable(&cv_);
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}
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ConditionVariable::~ConditionVariable() {}
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ConditionVariable::WaitResult ConditionVariable::Wait(Mutex* mutex,
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int64_t timeout_millis) {
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mutex->owner_.Release();
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Monitor::WaitResult retval = kNotified;
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if (timeout_millis == kNoTimeout) {
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SleepConditionVariableSRW(&cv_, &mutex->mutex_, INFINITE, 0);
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} else {
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// Wait for the given period of time for a Notify or a NotifyAll
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// event.
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if (!SleepConditionVariableSRW(&cv_, &mutex->mutex_, timeout_millis, 0)) {
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ASSERT(GetLastError() == ERROR_TIMEOUT);
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retval = kTimedOut;
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}
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}
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mutex->owner_.Acquire();
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return retval;
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}
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ConditionVariable::WaitResult ConditionVariable::WaitMicros(Mutex* mutex,
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int64_t micros) {
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// TODO(johnmccutchan): Investigate sub-millisecond sleep times on Windows.
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int64_t millis = micros / kMicrosecondsPerMillisecond;
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if ((millis * kMicrosecondsPerMillisecond) < micros) {
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// We've been asked to sleep for a fraction of a millisecond,
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// this isn't supported on Windows. Bumps milliseconds up by one
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// so that we never return too early. We likely return late though.
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millis += 1;
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}
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return Wait(mutex, millis);
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}
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void ConditionVariable::Notify() {
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WakeConditionVariable(&cv_);
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}
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void ConditionVariable::NotifyAll() {
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WakeAllConditionVariable(&cv_);
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}
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} // namespace dart
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#endif // defined(DART_HOST_OS_WINDOWS) && !defined(DART_USE_ABSL)
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