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- /*
- * 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- * example may not be published in printed form or distributed with any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));
- }
-