gettimeofday(): Help please : SOURCES

[sashti srinivasan]

Hello,

   I approached the list with following problems:
(1) "raw handler connexion failed" in pc386.(found to
be because of usage of functions Timer_initialize(),
Read_timer())
(2) gettimeofday() returning constant value.
   Please help me in getting them solved.  The
relevant source code is as below.

  My main file is this.  This is intented to be used
in both linux and rtems.  I think, I have more problem
in the next file I used for time measurements.  Help
me in getting the problems solved.

-------------------------------------------------------------
/* Posix performance measurement suite
 * S Srinivasan CS02M040, iitm
 */
#include <stdio.h>

#define FORCE_TIMEOFDAY
#define FOR_RTEMS

/*
 * The Declaration of main routine depends
 * on the platform
 */
#ifdef FOR_RTEMS
void * RtemsMain(void *arg)
#else
#ifdef FOR_UCLINUX
int MainUclinux()
#else
int main(int argc, char **argv)
#endif
#endif
{
   DoTests();
   exit(0);
}



#ifdef FOR_RTEMS
#include <bsp.h>

#define CONFIGURE_POSIX_INIT_THREAD_TABLE
#define CONFIGURE_POSIX_INIT_THREAD_ENTRY_POINT 

(void*)RtemsMain

#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
#define CONFIGURE_APPLICATION_NEEDS_TIMER_DRIVER

#define CONFIGURE_MAXIMUM_POSIX_THREADS 110
#define CONFIGURE_MAXIMUM_POSIX_SEMAPHORES 110
#define CONFIGURE_MAXIMUM_POSIX_MUTEXES 110
#define CONFIGURE_MAXIMUM_TASKS 120

#define CONFIGURE_INIT

#include <confdefs.h>
#endif
--------------------------------------------------------------

The following is the file I use for timing
measurement.  I use three functions.  StartWatch(),
StopWatch(), ReadWatch().  The first and third are
similar to Timer_initialize() and Read_timer() (used
in tmtests) respectively.
--------------------------------------------------------------

/* Routines used for time measurement *
 * CS02M040 S Srinivasan IIT(M)       */

#define FORCE_TIMEOFDAY
#define FOR_RTEMS

typedef struct
{
        struct timeval atStart;
        struct timeval atStop;
        struct timezone notUsed;
        int watchRunning;
        long currentTime;
        char reportText[500][100];
        int reportLocation;
}SupportData;
SupportData sd;

long TimeDifference(struct timeval tStart, struct
timeval tEnd)
{
#ifndef FORCE_TIMEOFDAY
#ifndef FOR_RTEMS
        long seconds,microseconds;
        seconds=tEnd.tv_sec-tStart.tv_sec;
        microseconds=tEnd.tv_usec-tStart.tv_usec;
        microseconds=microseconds+seconds*1000000;
        return microseconds;
#else
        return sd.currentTime;
#endif
#else
        long seconds,microseconds;
        seconds=tEnd.tv_sec-tStart.tv_sec;
        microseconds=tEnd.tv_usec-tStart.tv_usec;
        microseconds=microseconds+seconds*1000000;
        return microseconds;
#endif
}

void StartWatch()
{
        sd.watchRunning=1;
#ifndef FORCE_TIMEOFDAY
#ifndef FOR_RTEMS
        gettimeofday(&sd.atStart,&sd.notUsed);
#else
        Timer_initialize();
#endif
#else
        gettimeofday(&sd.atStart,&sd.notUsed);
#endif
}

void StopWatch()
{
#ifndef FORCE_TIMEOFDAY
#ifndef FOR_RTEMS
        gettimeofday(&sd.atStop,&sd.notUsed);
#else
        sd.currentTime=Read_timer();
#endif
#else
        gettimeofday(&sd.atStop,&sd.notUsed);
#endif
        sd.watchRunning=0;
}

long ReadWatch()
{
        if(sd.watchRunning==0)
                

sd.currentTime=TimeDifference(sd.atStart,sd.atStop);
        else
                sd.currentTime=-1;
        return sd.currentTime;
}
------------------------------------------------------
With Regards
Srinivasan

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