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 * Copyright (c) 2015, 2022, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * under the terms of the GNU General Public License version 2 only, as
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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#ifndef SHARE_RUNTIME_SEMAPHORE_HPP
#define SHARE_RUNTIME_SEMAPHORE_HPP

#include "memory/allocation.hpp"
#include "utilities/globalDefinitions.hpp"

#if defined(LINUX) || defined(AIX)
# include "semaphore_posix.hpp"
#else
# include OS_HEADER(semaphore)
#endif

class JavaThread;

// Implements the limited, platform independent Semaphore API.
class Semaphore : public CHeapObj<mtSynchronizer> {
  SemaphoreImpl _impl;

  NONCOPYABLE(Semaphore);

 public:
  Semaphore(uint value = 0) : _impl(value) {}
  ~Semaphore() {}

  void signal(uint count = 1) { _impl.signal(count); }

  void wait()                 { _impl.wait(); }

  bool trywait()              { return _impl.trywait(); }

  void wait_with_safepoint_check(JavaThread* thread);
};

#endif // SHARE_RUNTIME_SEMAPHORE_HPP