base/threading/worker_pool_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/threading/worker_pool.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/location.h"
  10 #include "base/message_loop.h"
  11 #include "base/test/test_timeouts.h"
  12 #include "base/time.h"
  13 #include "base/threading/thread_checker_impl.h"
  14 #include "base/synchronization/waitable_event.h"
  15 #include "testing/gtest/include/gtest/gtest.h"
  16 #include "testing/platform_test.h"
  17
  18 typedef PlatformTest WorkerPoolTest;
  19
  20 namespace base {
  21
  22 namespace {
  23
  24 class PostTaskAndReplyTester
  25     : public base::RefCountedThreadSafe<PostTaskAndReplyTester> {
  26  public:
  27   PostTaskAndReplyTester() : finished_(false), test_event_(false, false) {}
  28
  29   void RunTest() {
  30     ASSERT_TRUE(thread_checker_.CalledOnValidThread());
  31     WorkerPool::PostTaskAndReply(
  32       FROM_HERE,
  33       base::Bind(&PostTaskAndReplyTester::OnWorkerThread, this),
  34       base::Bind(&PostTaskAndReplyTester::OnOriginalThread, this),
  35       false);
  36
  37     test_event_.Wait();
  38   }
  39
  40   void OnWorkerThread() {
  41     // We're not on the original thread.
  42     EXPECT_FALSE(thread_checker_.CalledOnValidThread());
  43
  44     test_event_.Signal();
  45   }
  46
  47   void OnOriginalThread() {
  48     EXPECT_TRUE(thread_checker_.CalledOnValidThread());
  49     finished_ = true;
  50   }
  51
  52   bool finished() const {
  53     return finished_;
  54   }
  55
  56  private:
  57   friend class base::RefCountedThreadSafe<PostTaskAndReplyTester>;
  58   ~PostTaskAndReplyTester() {}
  59
  60   bool finished_;
  61   WaitableEvent test_event_;
  62
  63   // The Impl version performs its checks even in release builds.
  64   ThreadCheckerImpl thread_checker_;
  65 };
  66
  67 }  // namespace
  68
  69 TEST_F(WorkerPoolTest, PostTask) {
  70   WaitableEvent test_event(false, false);
  71   WaitableEvent long_test_event(false, false);
  72
  73   WorkerPool::PostTask(FROM_HERE,
  74                        base::Bind(&WaitableEvent::Signal,
  75                                   base::Unretained(&test_event)),
  76                        false);
  77   WorkerPool::PostTask(FROM_HERE,
  78                        base::Bind(&WaitableEvent::Signal,
  79                                   base::Unretained(&long_test_event)),
  80                        true);
  81
  82   test_event.Wait();
  83   long_test_event.Wait();
  84 }
  85
  86 #if defined(OS_WIN) || defined(OS_LINUX)
  87 // Flaky on Windows and Linux (http://crbug.com/130337)
  88 #define MAYBE_PostTaskAndReply DISABLED_PostTaskAndReply
  89 #else
  90 #define MAYBE_PostTaskAndReply PostTaskAndReply
  91 #endif
  92
  93 TEST_F(WorkerPoolTest, MAYBE_PostTaskAndReply) {
  94   MessageLoop message_loop;
  95   scoped_refptr<PostTaskAndReplyTester> tester(new PostTaskAndReplyTester());
  96   tester->RunTest();
  97
  98   const TimeDelta kMaxDuration = TestTimeouts::tiny_timeout();
  99   TimeTicks start = TimeTicks::Now();
 100   while (!tester->finished() && TimeTicks::Now() - start < kMaxDuration) {
 101 #if defined(OS_IOS)
 102     // Ensure that the other thread has a chance to run even on a single-core
 103     // device.
 104     pthread_yield_np();
 105 #endif
 106     MessageLoop::current()->RunUntilIdle();
 107   }
 108   EXPECT_TRUE(tester->finished());
 109 }
 110
 111 }  // namespace base