time-stamp.c


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/* Tom Gall (tom.gall@linaro.org / tom_gall@mac.com)
 * Copyright Linaro 2014
 * Released under the terms and conditions of the license documented in the LICENSE file
 */

#include <time.h>
#include <stdio.h>

int 
opencl_collect_timestamp(struct timespec *timestamp) {
    if (clock_gettime(CLOCK_MONOTONIC,timestamp)) {
        return -1; 
    }

	return 0;
}

void
opencl_print_time_interval(struct timespec *start, struct timespec *end) {
	unsigned long long startMsec, endMsec;

    startMsec = start->tv_sec * 1000000;
    startMsec += start->tv_nsec/1000;
    if (start->tv_nsec % 1000 >= 500) {
        ++startMsec;
    }
    endMsec = end->tv_sec * 1000000;
    endMsec += end->tv_nsec/1000;
    if (end->tv_nsec % 1000 >= 500) {
        ++endMsec;
    }
    printf("Interval took %lld microseconds\n",endMsec - startMsec);

}