uiget.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 121 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 <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <i86.h>
#include "doscall.h"
#include "uidef.h"
#include "uiforce.h"

extern EVENT    Event;


void global uiflush( void )
/*************************/
{
    Event = EV_NO_EVENT;
    flushkey();
}

unsigned long global uiclock( void )
/**********************************/
{
    #ifdef __386__
//      return( clock() );
// clock() is tricky because it is version dependent! In 10.x it used to run
// at 100 clocks per sec, in 11.0 it's 1000. To avoid confusion we go straight
// to the OS. MN
        ULONG ulTime;
        DosQuerySysInfo(QSV_MS_COUNT, QSV_MS_COUNT, &ulTime, sizeof(ulTime));
        return ulTime;
    #else
        static unsigned long  far *clock;
        SEL gbl;
        SEL lcl;

        if( clock == NULL ) {
            if( _osmode == DOS_MODE ) {
                clock = MK_FP( 0x40, 0x6c );    /* time of day in BIOS area */
            } else {
                DosGetInfoSeg( &gbl, &lcl );
                clock = MK_FP( gbl, offsetof( struct _GINFOSEG, msecs ) );
            }
        }
        return( *clock );
    #endif
}

EVENT global uieventsource( int update )
/**************************************/
{
    register    EVENT                   ev;
    static      int                     ReturnIdle = 1;
    unsigned long                       start;

    start = uiclock();
    for( ; ; ) {
        ev = forcedevent();
        if( ev > EV_NO_EVENT ) break;
        ev = mouseevent();
        if( ev > EV_NO_EVENT ) break;
        ev = keyboardevent();
        if( ev > EV_NO_EVENT ) {
            uihidemouse();
            break;
        }
        if( ReturnIdle ) {
            ReturnIdle--;
            return( EV_IDLE );
        } else {
            if( update ) uirefresh();
            if( uiclock() - start >= UIData->tick_delay ) {
                return( EV_CLOCK_TICK );
            } else if( UIData->busy_wait ) {
                return( EV_SINK );
            }
        }
        /* give the system a chance to run something else */
        if( _osmode != DOS_MODE ) DosSleep( 1 );
    }
    ReturnIdle = 1;
    return( ev );
}


EVENT global uiget( void )
/************************/
{
    return( uieventsource( 1 ) );
}