/*

 * Copyright (c) 1997, 2019, 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

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 */

#ifndef SHARE_RUNTIME_SAFEPOINTVERIFIERS_HPP

#define SHARE_RUNTIME_SAFEPOINTVERIFIERS_HPP

#include "memory/allocation.hpp"

#include "runtime/thread.hpp"

// A NoSafepointVerifier object will throw an assertion failure if

// the current thread passes a possible safepoint while this object is

// instantiated. A safepoint, will either be: an oop allocation, blocking

// on a Mutex or JavaLock, or executing a VM operation.

//

class NoSafepointVerifier : public StackObj {

 friend class PauseNoSafepointVerifier;

 private:

  Thread *_thread;

 public:

  NoSafepointVerifier()  NOT_DEBUG_RETURN;

  ~NoSafepointVerifier() NOT_DEBUG_RETURN;

};

// A PauseNoSafepointVerifier is used to temporarily pause the

// behavior of a NoSafepointVerifier object.

class PauseNoSafepointVerifier : public StackObj {

 private:

  NoSafepointVerifier* _nsv;

 public:

  PauseNoSafepointVerifier(NoSafepointVerifier* nsv) NOT_DEBUG_RETURN;

  ~PauseNoSafepointVerifier() NOT_DEBUG_RETURN;

};

#endif // SHARE_RUNTIME_SAFEPOINTVERIFIERS_HPP