/*----------------------------------------------------------------------------*/
/*                                                                            */
/* Copyright (c) 1995, 2004 IBM Corporation. All rights reserved.             */
/* Copyright (c) 2005-2019 Rexx Language Association. All rights reserved.    */
/*                                                                            */
/* This program and the accompanying materials are made available under       */
/* the terms of the Common Public License v1.0 which accompanies this         */
/* distribution. A copy is also available at the following address:           */
/* http://www.oorexx.org/license.html                                         */
/*                                                                            */
/* Redistribution and use in source and binary forms, with or                 */
/* without modification, are permitted provided that the following            */
/* conditions are met:                                                        */
/*                                                                            */
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/* notice, this list of conditions and the following disclaimer.              */
/* Redistributions in binary form must reproduce the above copyright          */
/* notice, this list of conditions and the following disclaimer in            */
/* the documentation and/or other materials provided with the distribution.   */
/*                                                                            */
/* Neither the name of Rexx Language Association nor the names                */
/* of its contributors may be used to endorse or promote products             */
/* derived from this software without specific prior written permission.      */
/*                                                                            */
/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS        */
/* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT          */
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/*                                                                            */
/*----------------------------------------------------------------------------*/
/*****************************************************************************/
/* REXX Unix Support                                                         */
/*                                                                           */
/* Semaphore support for Unix systems                                        */
/*                                                                           */
/*****************************************************************************/

#ifndef SysSemaphore_DEFINED
#define SysSemaphore_DEFINED

#include <pthread.h>
#include <stdlib.h>
#include "rexx.h"
#include "SysThread.hpp"

class SysSemaphore {
public:
     SysSemaphore() : postedCount(0), created(false) { }
     SysSemaphore(bool);
     ~SysSemaphore() { ; }
     void create();
     inline void open() { ; }
     void close();
     void post();
     void wait();
     bool wait(uint32_t);
     void reset();
     inline bool posted() { return postedCount != 0; }
     static void createTimeOut(uint32_t t, timespec &ts);

protected:
     pthread_cond_t  semCond;
     pthread_mutex_t semMutex;
     int postedCount;
     bool created;
};

class SysMutex {
public:
     SysMutex() : created(false) { ; }
     SysMutex(bool create, bool critical = false);
     ~SysMutex() { ; }
     void create(bool critical = false);
     inline void open() { ; }
     void close();
     bool request(uint32_t t);
     inline bool request() { if (!created) return false; return pthread_mutex_lock(&mutexMutex) == 0; }
     inline bool release() { return pthread_mutex_unlock(&mutexMutex) == 0; }
     inline bool requestImmediate() { return pthread_mutex_trylock(&mutexMutex) == 0;}

protected:
     pthread_mutex_t mutexMutex;
     bool created;
};
#endif