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Datei: zStat.hpp Sprache: C

/*
* Copyright (c) 2015, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* 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).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

#ifndef SHARE_GC_Z_ZLOCK_HPP
#define SHARE_GC_Z_ZLOCK_HPP

#include "memory/allocation.hpp"
#include "runtime/mutex.hpp"

class ZLock {
private:
  PlatformMutex _lock;

public:
  void lock();
  bool try_lock();
  void unlock();
};

class ZReentrantLock {
private:
  ZLock            _lock;
  Thread* volatile _owner;
  uint64_t         _count;

public:
  ZReentrantLock();

  void lock();
  void unlock();

  bool is_owned() const;
};

class ZConditionLock {
private:
  PlatformMonitor _lock;

public:
  void lock();
  bool try_lock();
  void unlock();

  bool wait(uint64_t millis = 0);
  void notify();
  void notify_all();
};

template <typename T>
class ZLocker : public StackObj {
private:
  T* const _lock;

public:
  ZLocker(T* lock);
  ~ZLocker();
};

#endif // SHARE_GC_Z_ZLOCK_HPP

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