home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Almathera Ten Pack 3: CDPD 3
/
Almathera Ten on Ten - Disc 3: CDPD3.iso
/
fish
/
726-750
/
741
/
rkrm_devices
/
rkrm_devices.lha
/
Timer
/
Timer_Arithmetic.c
< prev
Wrap
C/C++ Source or Header
|
1992-09-03
|
5KB
|
124 lines
/*
* Copyright (c) 1992 Commodore-Amiga, Inc.
*
* This example is provided in electronic form by Commodore-Amiga, Inc. for
* use with the "Amiga ROM Kernel Reference Manual: Devices", 3rd Edition,
* published by Addison-Wesley (ISBN 0-201-56775-X).
*
* The "Amiga ROM Kernel Reference Manual: Devices" contains additional
* information on the correct usage of the techniques and operating system
* functions presented in these examples. The source and executable code
* of these examples may only be distributed in free electronic form, via
* bulletin board or as part of a fully non-commercial and freely
* redistributable diskette. Both the source and executable code (including
* comments) must be included, without modification, in any copy. This
* example may not be published in printed form or distributed with any
* commercial product. However, the programming techniques and support
* routines set forth in these examples may be used in the development
* of original executable software products for Commodore Amiga computers.
*
* All other rights reserved.
*
* This example is provided "as-is" and is subject to change; no
* warranties are made. All use is at your own risk. No liability or
* responsibility is assumed.
*
*****************************************************************************
*
*
* Timer_Arithmetic.c
*
* Example of timer device arithmetic functions
*
* Compile with SAS C 5.10 lc -b1 -cfistq -v -y -L
*
* Run from CLI only
*/
#include <exec/types.h>
#include <exec/io.h>
#include <exec/memory.h>
#include <devices/timer.h>
#include <clib/exec_protos.h>
#include <clib/alib_protos.h>
#include <clib/timer_protos.h>
#include <stdio.h>
#ifdef LATTICE
int CXBRK(void) { return(0); } /* Disable Lattice CTRL/C handling */
int chkabort(void) { return(0); } /* really */
#endif
struct Library *TimerBase; /* setup the interface variable (must be global) */
void main(int argc,char **argv)
{
struct timeval *time1, *time2, *time3;
struct timerequest *tr;
LONG error,result;
/*------------------------------------*/
/* Get some memory for our structures */
/*------------------------------------*/
time1=(struct timeval *)AllocMem(sizeof(struct timeval),
MEMF_PUBLIC | MEMF_CLEAR);
time2=(struct timeval *)AllocMem(sizeof(struct timeval),
MEMF_PUBLIC | MEMF_CLEAR);
time3=(struct timeval *)AllocMem(sizeof(struct timeval),
MEMF_PUBLIC | MEMF_CLEAR);
tr=(struct timerequest *)AllocMem(sizeof(struct timerequest),
MEMF_PUBLIC | MEMF_CLEAR);
/* Make sure we got the memory */
if(!time1 | !time2 | !time3 | !tr) goto cleanexit;
/*---------------------------------------------------------------------------*/
/* Set up values to test time arithmetic with. In a real application these */
/* values might be filled in via the GET_SYSTIME command of the timer device */
/*---------------------------------------------------------------------------*/
time1->tv_secs = 3; time1->tv_micro = 0; /* 3.0 seconds */
time2->tv_secs = 2; time2->tv_micro = 500000; /* 2.5 seconds */
time3->tv_secs = 1; time3->tv_micro = 900000; /* 1.9 seconds */
printf("Time1 is %ld.%ld\n" , time1->tv_secs,time1->tv_micro);
printf("Time2 is %ld.%ld\n" , time2->tv_secs,time2->tv_micro);
printf("Time3 is %ld.%ld\n\n",time3->tv_secs,time3->tv_micro);
/*-------------------------------*/
/* Open the MICROHZ timer device */
/*-------------------------------*/
error = OpenDevice(TIMERNAME,UNIT_MICROHZ,(struct IORequest *) tr, 0L);
if(error) goto cleanexit;
/* Set up to use the special time arithmetic functions */
TimerBase = (struct Library *)tr->tr_node.io_Device;
/*--------------------------------------------------------------------------*/
/* Now that TimerBase is initialized, it is permissible to call the */
/* time-comparison or time-arithmetic routines. Result of this example */
/* is -1 which means the first parameter has greater time value than second */
/* parameter +1 means the second parameter is bigger; 0 means equal. */
/*--------------------------------------------------------------------------*/
result = CmpTime( time1, time2 );
printf("Time1 and Time2 compare = %ld\n",result);
/* Add time2 to time1, result in time1 */
AddTime( time1, time2);
printf("Time1 + Time2 = %ld.%ld\n",time1->tv_secs,time1->tv_micro);
/* Subtract time3 from time2, result in time2 */
SubTime( time2, time3);
printf("Time2 - Time3 = %ld.%ld\n",time2->tv_secs,time2->tv_micro);
/*------------------------------------*/
/* Free system resources that we used */
/*------------------------------------*/
cleanexit:
if (time1)
FreeMem(time1,sizeof(struct timeval));
if (time2)
FreeMem(time2,sizeof(struct timeval));
if (time3)
FreeMem(time3,sizeof(struct timeval));
if (!error)
CloseDevice((struct IORequest *) tr);
if (tr)
FreeMem(tr,sizeof(struct timerequest));
}