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99 lines
2.6 KiB
C++
99 lines
2.6 KiB
C++
// Copyright 2015 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "util/thread/thread.h"
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#include "base/basictypes.h"
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#include "gtest/gtest.h"
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#include "util/synchronization/semaphore.h"
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namespace crashpad {
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namespace test {
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namespace {
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class NoopThread : public Thread {
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public:
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NoopThread() {}
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~NoopThread() override {}
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private:
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void ThreadMain() override {}
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DISALLOW_COPY_AND_ASSIGN(NoopThread);
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};
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class WaitThread : public Thread {
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public:
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explicit WaitThread(Semaphore* semaphore) : semaphore_(semaphore) {}
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~WaitThread() override {}
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private:
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void ThreadMain() override { semaphore_->Wait(); }
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Semaphore* semaphore_;
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DISALLOW_COPY_AND_ASSIGN(WaitThread);
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};
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class JoinAndSignalThread : public Thread {
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public:
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JoinAndSignalThread(Thread* thread, Semaphore* semaphore)
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: thread_(thread), semaphore_(semaphore) {}
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~JoinAndSignalThread() override {}
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private:
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void ThreadMain() override {
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thread_->Join();
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semaphore_->Signal();
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}
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Thread* thread_;
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Semaphore* semaphore_;
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DISALLOW_COPY_AND_ASSIGN(JoinAndSignalThread);
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};
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TEST(ThreadTest, NoStart) {
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NoopThread thread;
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}
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TEST(ThreadTest, Start) {
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NoopThread thread;
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thread.Start();
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thread.Join();
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}
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TEST(ThreadTest, JoinBlocks) {
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Semaphore unblock_wait_thread_semaphore(0);
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Semaphore join_completed_semaphore(0);
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WaitThread wait_thread(&unblock_wait_thread_semaphore);
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wait_thread.Start();
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JoinAndSignalThread join_and_signal_thread(&wait_thread,
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&join_completed_semaphore);
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join_and_signal_thread.Start();
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// join_completed_semaphore will be signaled when wait_thread.Join() returns
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// (in JoinAndSignalThread::ThreadMain). Since wait_thread is blocking on
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// unblock_wait_thread_semaphore, we don't expect the Join to return yet. We
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// wait up to 100ms to give a broken implementation of Thread::Join a chance
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// to return.
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ASSERT_FALSE(join_completed_semaphore.TimedWait(.1));
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unblock_wait_thread_semaphore.Signal();
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join_completed_semaphore.Wait();
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join_and_signal_thread.Join();
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}
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} // namespace
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} // namespace test
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} // namespace crashpad
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