winlock.cpp

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C++ 代码 · 共 94 行

/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
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* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
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****************************************************************************/



#include "winlock.h"

namespace iothread {

__lock::__lock() {
/*****************/
    InitializeCriticalSection(&locksec);
}

__lock::~__lock() {
/*****************/
    DeleteCriticalSection(&locksec);
}

void __lock::p( void ) {
/**********************/
    EnterCriticalSection(&locksec);
}

void __lock::v( void ) {
/**********************/
    LeaveCriticalSection(&locksec);
}

/***************************************************/

__semaphore::__semaphore(int initSize, int maxSize) {
    _sem =  CreateSemaphore(NULL,initSize,maxSize,NULL);
    _level = initSize;
}

__semaphore::~__semaphore() {
    CloseHandle(_sem);
}

int __semaphore::decrease(int timeOut) {
    DWORD result = WaitForSingleObject(_sem, timeOut);
    _level--;
    return(result);
}

int __semaphore::decrease() {
    DWORD result =WaitForSingleObject(_sem, INFINITE);
    _level--;
    return(result);
}

int __semaphore::increase() {
    DWORD result = ReleaseSemaphore(_sem, 1, NULL);
    _level++;
    return(result);
}

int __semaphore::increase(int increaseBy) {
    DWORD result = ReleaseSemaphore(_sem, increaseBy, NULL);
    _level+=increaseBy;
    return(result);
}

} // end of namespace iothread