| // 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(); |
| } |