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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <process.h> // _beginthreadex
#include "base/lock.h"
#include "base/scoped_ptr.h"
#include "base/shared_event.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
class SharedEventTest : public testing::Test {
};
Lock lock;
unsigned __stdcall MultipleThreadMain(void* param) {
SharedEvent* shared_event = reinterpret_cast<SharedEvent*>(param);
AutoLock l(lock);
shared_event->SetSignaledState(!shared_event->IsSignaled());
return 0;
}
}
TEST(SharedEventTest, ThreadSignaling) {
// Create a set of 5 threads to each open a shared event and flip the
// signaled state. Verify that when the threads complete, the final state is
// not-signaled.
// I admit this doesn't test much, but short of spawning separate processes
// and using IPC with a SharedEventHandle, there's not much to unittest.
const int kNumThreads = 5;
HANDLE threads[kNumThreads];
scoped_ptr<SharedEvent> shared_event(new SharedEvent);
shared_event->Create(true, true);
// Spawn the threads.
for (int16 index = 0; index < kNumThreads; index++) {
void *argument = reinterpret_cast<void*>(shared_event.get());
unsigned thread_id;
threads[index] = reinterpret_cast<HANDLE>(
_beginthreadex(NULL, 0, MultipleThreadMain, argument, 0, &thread_id));
EXPECT_NE(threads[index], static_cast<HANDLE>(NULL));
}
// Wait for the threads to finish.
for (int index = 0; index < kNumThreads; index++) {
DWORD rv = WaitForSingleObject(threads[index], 60*1000);
EXPECT_EQ(rv, WAIT_OBJECT_0); // verify all threads finished
CloseHandle(threads[index]);
}
EXPECT_FALSE(shared_event->IsSignaled());
}
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