iposva@google.com
48aed26029
- Attempt to run the Monitor thread_test multiple times before failing due to its potential to failure due to timing. - Use named constants when converting millis to seconds and nanos. Review URL: https://codereview.chromium.org//11361157 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@14695 260f80e4-7a28-3924-810f-c04153c831b5
77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
// Copyright (c) 2012, 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/assert.h"
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#include "vm/isolate.h"
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#include "vm/unit_test.h"
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#include "vm/thread.h"
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namespace dart {
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UNIT_TEST_CASE(Mutex) {
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// This unit test case needs a running isolate.
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Isolate* isolate = Isolate::Init(NULL);
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Mutex* mutex = new Mutex();
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mutex->Lock();
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EXPECT_EQ(false, mutex->TryLock());
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mutex->Unlock();
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EXPECT_EQ(true, mutex->TryLock());
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mutex->Unlock();
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{
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MutexLocker ml(mutex);
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EXPECT_EQ(false, mutex->TryLock());
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}
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// The isolate shutdown and the destruction of the mutex are out-of-order on
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// purpose.
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isolate->Shutdown();
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delete isolate;
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delete mutex;
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}
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UNIT_TEST_CASE(Monitor) {
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// This unit test case needs a running isolate.
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Isolate* isolate = Isolate::Init(NULL);
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Monitor* monitor = new Monitor();
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monitor->Enter();
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monitor->Exit();
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const int kNumAttempts = 5;
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int attempts = 0;
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while (attempts < kNumAttempts) {
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MonitorLocker ml(monitor);
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int64_t start = OS::GetCurrentTimeMillis();
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int64_t wait_time = 2017;
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Monitor::WaitResult wait_result = ml.Wait(wait_time);
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int64_t stop = OS::GetCurrentTimeMillis();
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// We expect to be timing out here.
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EXPECT_EQ(Monitor::kTimedOut, wait_result);
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// Check whether this attempt falls within the exptected time limits.
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int64_t wakeup_time = stop - start;
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OS::Print("wakeup_time: %"Pd64"\n", wakeup_time);
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const int kAcceptableTimeJitter = 20; // Measured in milliseconds.
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const int kAcceptableWakeupDelay = 150; // Measured in milliseconds.
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if (((wait_time - kAcceptableTimeJitter) <= wakeup_time) &&
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(wakeup_time <= (wait_time + kAcceptableWakeupDelay))) {
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break;
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}
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// Record the attempt.
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attempts++;
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}
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EXPECT_LT(attempts, kNumAttempts);
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// The isolate shutdown and the destruction of the mutex are out-of-order on
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// purpose.
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isolate->Shutdown();
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delete isolate;
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delete monitor;
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}
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} // namespace dart
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