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sampling.h

/*
 *                         Sun Public License Notice
 *
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"); you may not use this file except
 * in compliance with the License. A copy of the License is available
 * at http://www.sun.com/
 *
 * The Original Code is the Java Profiler module.  The Initial Developers
 * of the Original Code are Jan Stola, Pavel Vacha, Michal Pise, Petr Luner,
 * Lukas Petru and Marek Przeczek.
 *
 * Portions created by Jan Stola are Copyright (C) 2000-2001.
 * All Rights Reserved.
 *
 * Portions created by Pavel Vacha are Copyright (C) 2000-2001.
 * All Rights Reserved.
 *
 * Portions created by Michal Pise are Copyright (C) 2000-2001.
 * All Rights Reserved.
 *
 * Portions created by Petr Luner are Copyright (C) 2000-2001.
 * All Rights Reserved.
 *
 * Portions created by Lukas Petru are Copyright (C) 2000-2001.
 * All Rights Reserved.
 *
 * Portions created by Marek Przeczek are Copyright (C) 2000-2001.
 * All Rights Reserved.
 *
 * Contributors: Jan Stola, Pavel Vacha, Michal Pise, Petr Luner,
 *               Lukas Petru and Marek Przeczek.
 */

#ifndef _SAMPLING_H_
#define _SAMPLING_H_

#include "../main/includes.h"
#include "../prof/lock.h"

class Sampling {

        enum CMD {

                CMD_TURN_ON,
                CMD_TURN_OFF,
                CMD_TERMINATE
        };

private:

        CMD _cmd;

#ifdef USE_RAW_MONITORS

        Lock _lock;
#else
#ifdef WIN32

        HANDLE _turnedOn;

        CRITICAL_SECTION _cs;
#else

        pthread_cond_t  _cond;

        pthread_mutex_t _mutex;
#endif
#endif

public:

        Sampling( JVMPI_Interface* jvmpi);
        
        ~Sampling();

        int startThread(int turnedOn);

        void terminateThread();

#ifndef USE_RAW_MONITORS

        void turnOn();

        void turnOff();
#endif

private:

        void main();

        void doOneSample();

private:

        static void samplingMain( void*);

#ifdef _DEBUG
public:

        unsigned long start;
        unsigned long finish;
        unsigned long samples;
#endif // _DEBUG

private:

        int _terminated;

public:

        int isTerminated();
};

#endif // _SAMPLING_H_

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