// Copyright 2013 the V8 project authors. 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 <stdlib.h> #include "v8.h" #include "platform.h" #include "cctest.h" using namespace ::v8::internal; class WaitAndSignalThread V8_FINAL : public Thread { public: explicit WaitAndSignalThread(Semaphore* semaphore) : Thread("WaitAndSignalThread"), semaphore_(semaphore) {} virtual ~WaitAndSignalThread() {} virtual void Run() V8_OVERRIDE { for (int n = 0; n < 1000; ++n) { semaphore_->Wait(); bool result = semaphore_->WaitFor(TimeDelta::FromMicroseconds(1)); ASSERT(!result); USE(result); semaphore_->Signal(); } } private: Semaphore* semaphore_; }; TEST(WaitAndSignal) { Semaphore semaphore(0); WaitAndSignalThread t1(&semaphore); WaitAndSignalThread t2(&semaphore); t1.Start(); t2.Start(); // Make something available. semaphore.Signal(); t1.Join(); t2.Join(); semaphore.Wait(); bool result = semaphore.WaitFor(TimeDelta::FromMicroseconds(1)); ASSERT(!result); USE(result); } TEST(WaitFor) { bool ok; Semaphore semaphore(0); // Semaphore not signalled - timeout. ok = semaphore.WaitFor(TimeDelta::FromMicroseconds(0)); CHECK(!ok); ok = semaphore.WaitFor(TimeDelta::FromMicroseconds(100)); CHECK(!ok); ok = semaphore.WaitFor(TimeDelta::FromMicroseconds(1000)); CHECK(!ok); // Semaphore signalled - no timeout. semaphore.Signal(); ok = semaphore.WaitFor(TimeDelta::FromMicroseconds(0)); CHECK(ok); semaphore.Signal(); ok = semaphore.WaitFor(TimeDelta::FromMicroseconds(100)); CHECK(ok); semaphore.Signal(); ok = semaphore.WaitFor(TimeDelta::FromMicroseconds(1000)); CHECK(ok); } static const char alphabet[] = "XKOAD"; static const int kAlphabetSize = sizeof(alphabet) - 1; static const int kBufferSize = 4096; // GCD(buffer size, alphabet size) = 1 static char buffer[kBufferSize]; static const int kDataSize = kBufferSize * kAlphabetSize * 10; static Semaphore free_space(kBufferSize); static Semaphore used_space(0); class ProducerThread V8_FINAL : public Thread { public: ProducerThread() : Thread("ProducerThread") {} virtual ~ProducerThread() {} virtual void Run() V8_OVERRIDE { for (int n = 0; n < kDataSize; ++n) { free_space.Wait(); buffer[n % kBufferSize] = alphabet[n % kAlphabetSize]; used_space.Signal(); } } }; class ConsumerThread V8_FINAL : public Thread { public: ConsumerThread() : Thread("ConsumerThread") {} virtual ~ConsumerThread() {} virtual void Run() V8_OVERRIDE { for (int n = 0; n < kDataSize; ++n) { used_space.Wait(); ASSERT_EQ(static_cast<int>(alphabet[n % kAlphabetSize]), static_cast<int>(buffer[n % kBufferSize])); free_space.Signal(); } } }; TEST(ProducerConsumer) { ProducerThread producer_thread; ConsumerThread consumer_thread; producer_thread.Start(); consumer_thread.Start(); producer_thread.Join(); consumer_thread.Join(); }