/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         https://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/


#include "itkSimpleFastMutexLock.h"

#include <iostream> // For cout.


int
itkSimpleFastMutexLockTest(int, char *[])
{
  {
    itk::SimpleFastMutexLock lock;

    // Acquire the lock
    lock.Lock();

    // Acquire the lock again; as this call happens within the same thread,
    // it shouldn't block.
    // If the lock isn't recursive, it will block forever and the CTest
    // timeout will cause the test to fail.
    lock.Lock();
  }


  { // Test non-blocking version
    itk::SimpleFastMutexLock nblock;
    nblock.Lock();
    nblock.Unlock();
    const bool testTryLockWhenFree = nblock.TryLock();
    if (testTryLockWhenFree != true)
    {
      std::cout << "Failed to capture a free lock with TryLock()" << std::endl;
      return EXIT_FAILURE;
    }

    if (!nblock.TryLock())
    {
      std::cout << "Failed to recursively capture a lock with TryLock()" << std::endl;
      return EXIT_FAILURE;
    }
    nblock.Unlock();
    nblock.Lock();
    // Ensure the TryLock() does not cause a deadlock.
    // If the lock isn't recursive, it will block forever and the CTest
    // timeout will cause the test to fail.
    nblock.Unlock();
  }

  return EXIT_SUCCESS;
}