/*

 * Copyright (c) 2012, 2018, 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_VM_JFR_PERIODIC_SAMPLING_JFRTHREADSAMPLER_HPP

#define SHARE_VM_JFR_PERIODIC_SAMPLING_JFRTHREADSAMPLER_HPP

#include "jfr/utilities/jfrAllocation.hpp"

class Monitor;

class JavaThread;

class JfrStackFrame;

class JfrThreadSampler;

class Thread;

class JfrThreadSampling : public JfrCHeapObj {

  friend class JfrRecorder;

 private:

  JfrThreadSampler* _sampler;

  void start_sampler(size_t interval_java, size_t interval_native);

  void set_sampling_interval(bool java_interval, size_t period);

  JfrThreadSampling();

  ~JfrThreadSampling();

  static JfrThreadSampling& instance();

  static JfrThreadSampling* create();

  static void destroy();

 public:

  static void set_java_sample_interval(size_t period);

  static void set_native_sample_interval(size_t period);

  static void on_javathread_suspend(JavaThread* thread);

  static Thread* sampler_thread();

};

#endif // SHARE_VM_JFR_PERIODIC_SAMPLING_JFRTHREADSAMPLER_HPP