// Copyright 2013 the V8 project authors. All rights reserved.
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// 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
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//       with the distribution.
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//       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
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#include <cstdlib>

#include "src/v8.h"

#include "src/platform/mutex.h"
#include "test/cctest/cctest.h"

using namespace ::v8::internal;


TEST(LockGuardMutex) {
  Mutex mutex;
  { LockGuard<Mutex> lock_guard(&mutex);
  }
  { LockGuard<Mutex> lock_guard(&mutex);
  }
}


TEST(LockGuardRecursiveMutex) {
  RecursiveMutex recursive_mutex;
  { LockGuard<RecursiveMutex> lock_guard(&recursive_mutex);
  }
  { LockGuard<RecursiveMutex> lock_guard1(&recursive_mutex);
    LockGuard<RecursiveMutex> lock_guard2(&recursive_mutex);
  }
}


TEST(LockGuardLazyMutex) {
  LazyMutex lazy_mutex = LAZY_MUTEX_INITIALIZER;
  { LockGuard<Mutex> lock_guard(lazy_mutex.Pointer());
  }
  { LockGuard<Mutex> lock_guard(lazy_mutex.Pointer());
  }
}


TEST(LockGuardLazyRecursiveMutex) {
  LazyRecursiveMutex lazy_recursive_mutex = LAZY_RECURSIVE_MUTEX_INITIALIZER;
  { LockGuard<RecursiveMutex> lock_guard(lazy_recursive_mutex.Pointer());
  }
  { LockGuard<RecursiveMutex> lock_guard1(lazy_recursive_mutex.Pointer());
    LockGuard<RecursiveMutex> lock_guard2(lazy_recursive_mutex.Pointer());
  }
}


TEST(MultipleMutexes) {
  Mutex mutex1;
  Mutex mutex2;
  Mutex mutex3;
  // Order 1
  mutex1.Lock();
  mutex2.Lock();
  mutex3.Lock();
  mutex1.Unlock();
  mutex2.Unlock();
  mutex3.Unlock();
  // Order 2
  mutex1.Lock();
  mutex2.Lock();
  mutex3.Lock();
  mutex3.Unlock();
  mutex2.Unlock();
  mutex1.Unlock();
}


TEST(MultipleRecursiveMutexes) {
  RecursiveMutex recursive_mutex1;
  RecursiveMutex recursive_mutex2;
  // Order 1
  recursive_mutex1.Lock();
  recursive_mutex2.Lock();
  CHECK(recursive_mutex1.TryLock());
  CHECK(recursive_mutex2.TryLock());
  recursive_mutex1.Unlock();
  recursive_mutex1.Unlock();
  recursive_mutex2.Unlock();
  recursive_mutex2.Unlock();
  // Order 2
  recursive_mutex1.Lock();
  CHECK(recursive_mutex1.TryLock());
  recursive_mutex2.Lock();
  CHECK(recursive_mutex2.TryLock());
  recursive_mutex2.Unlock();
  recursive_mutex1.Unlock();
  recursive_mutex2.Unlock();
  recursive_mutex1.Unlock();
}
