text: // Copyright 2006-2008 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.
  //
  // Tests of the TokenLock class from lock.h
  
  #include <stdlib.h>
  
  #include "v8.h"
  
  #include "platform.h"
  #include "cctest.h"
  
  
  using namespace ::v8::internal;
  
  
  // Simple test of locking logic
  TEST(Simple) {
    Mutex* mutex = OS::CreateMutex();
    CHECK_EQ(0, mutex->Lock());  // acquire the lock with the right token
    CHECK_EQ(0, mutex->Unlock());  // can unlock with the right token
    delete mutex;
  }
  
  
  TEST(MultiLock) {
    Mutex* mutex = OS::CreateMutex();
    CHECK_EQ(0, mutex->Lock());
    CHECK_EQ(0, mutex->Unlock());
    delete mutex;
  }
  
  
  TEST(ShallowLock) {
    Mutex* mutex = OS::CreateMutex();
    CHECK_EQ(0, mutex->Lock());
    CHECK_EQ(0, mutex->Unlock());
    CHECK_EQ(0, mutex->Lock());
    CHECK_EQ(0, mutex->Unlock());
    delete mutex;
  }
  
  
  TEST(SemaphoreTimeout) {
    bool ok;
    Semaphore* sem = OS::CreateSemaphore(0);
  
    // Semaphore not signalled - timeout.
    ok = sem->Wait(0);
    CHECK(!ok);
    ok = sem->Wait(100);
    CHECK(!ok);
    ok = sem->Wait(1000);
    CHECK(!ok);
  
    // Semaphore signalled - no timeout.
    sem->Signal();
    ok = sem->Wait(0);
    sem->Signal();
    ok = sem->Wait(100);
    sem->Signal();
    ok = sem->Wait(1000);
    CHECK(ok);
    delete sem;
  }
  