Replace the stop_event_ in PlatformThread with an atomic flag

webrtc/modules/utility/source/process_thread_impl_unittest.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 67 matching lines @@
 }
 
 // Verifies that we get at least call back to Process() on the worker thread.
 TEST(ProcessThreadImpl, ProcessCall) {
   ProcessThreadImpl thread("ProcessThread");
   thread.Start();
 
   std::unique_ptr<EventWrapper> event(EventWrapper::Create());
 
   MockModule module;
-  EXPECT_CALL(module, TimeUntilNextProcess()).WillRepeatedly(Return(0));
+  EXPECT_CALL(module, TimeUntilNextProcess())
+      .WillOnce(Return(0))
+      .WillRepeatedly(Return(1));
   EXPECT_CALL(module, Process())
       .WillOnce(DoAll(SetEvent(event.get()), Return()))
       .WillRepeatedly(Return());
   EXPECT_CALL(module, ProcessThreadAttached(&thread)).Times(1);
 
   thread.RegisterModule(&module);
   EXPECT_EQ(kEventSignaled, event->Wait(kEventWaitTimeout));
 
   EXPECT_CALL(module, ProcessThreadAttached(nullptr)).Times(1);
   thread.Stop();
 }
 
 // Same as ProcessCall except the module is registered before the
 // call to Start().
 TEST(ProcessThreadImpl, ProcessCall2) {
   ProcessThreadImpl thread("ProcessThread");
   std::unique_ptr<EventWrapper> event(EventWrapper::Create());
 
   MockModule module;
-  EXPECT_CALL(module, TimeUntilNextProcess()).WillRepeatedly(Return(0));
+  EXPECT_CALL(module, TimeUntilNextProcess())
+      .WillOnce(Return(0))
+      .WillRepeatedly(Return(1));
   EXPECT_CALL(module, Process())
       .WillOnce(DoAll(SetEvent(event.get()), Return()))
       .WillRepeatedly(Return());
 
   thread.RegisterModule(&module);
 
   EXPECT_CALL(module, ProcessThreadAttached(&thread)).Times(1);
   thread.Start();
   EXPECT_EQ(kEventSignaled, event->Wait(kEventWaitTimeout));
 
   EXPECT_CALL(module, ProcessThreadAttached(nullptr)).Times(1);
   thread.Stop();
 }
 
 // Tests setting up a module for callbacks and then unregister that module.
 // After unregistration, we should not receive any further callbacks.
 TEST(ProcessThreadImpl, Deregister) {
   ProcessThreadImpl thread("ProcessThread");
   std::unique_ptr<EventWrapper> event(EventWrapper::Create());
 
   int process_count = 0;
   MockModule module;
-  EXPECT_CALL(module, TimeUntilNextProcess()).WillRepeatedly(Return(0));
+  EXPECT_CALL(module, TimeUntilNextProcess())
+      .WillOnce(Return(0))
+      .WillRepeatedly(Return(1));
   EXPECT_CALL(module, Process())
       .WillOnce(DoAll(SetEvent(event.get()),
                       Increment(&process_count),
                       Return()))
       .WillRepeatedly(DoAll(Increment(&process_count), Return()));
 
   thread.RegisterModule(&module);
 
   EXPECT_CALL(module, ProcessThreadAttached(&thread)).Times(1);
   thread.Start();
@@ skipping 163 matching lines @@
   ProcessThreadImpl thread("ProcessThread");
   std::unique_ptr<EventWrapper> task_ran(EventWrapper::Create());
   std::unique_ptr<RaiseEventTask> task(new RaiseEventTask(task_ran.get()));
   thread.Start();
   thread.PostTask(std::move(task));
   EXPECT_EQ(kEventSignaled, task_ran->Wait(kEventWaitTimeout));
   thread.Stop();
 }
 
 }  // namespace webrtc