breakkey.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 80 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
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
*
*  ========================================================================
*
* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
*               DESCRIBE IT HERE!
*
****************************************************************************/


#include <signal.h>

#include "breakkey.h"

sig_atomic_t volatile breakDetected;

static void intHandler( int sig_num )
{
    sig_num = sig_num;
    breakDetected = 1;
}

int WBreakGet( void )
/*******************/
{
    sig_atomic_t v;

    v = breakDetected;
    breakDetected = 0;
    return( (int) v );
}

void WBreakSet( void )
/********************/
{
    breakDetected = 1;
}

void WBreakInit( void )
/*********************/
{
    signal( SIGINT, intHandler );
#ifndef __QNX__
    signal( SIGBREAK, intHandler );
#endif
    breakDetected = 0;
}

void WBreakFini( void )
/*********************/
{
    signal( SIGINT, SIG_DFL );
#ifndef __QNX__
    signal( SIGBREAK, SIG_DFL );
#endif
    breakDetected = 0;
}