#include <omp.h>

#include <stdio.h>

#include <time.h>

#include <unistd.h>

#define THREAD_SLEEP_MICROS 100 * 1000

#define MAIN_SLEEP_MICROS 50 * 1000

double threadTime = 0;

int main(int argc, char* argv[])

{

double mainStart = omp_get_wtime();

#pragma omp parallel num_threads(1) default(none) shared(threadTime)

{

double threadStart = omp_get_wtime();

usleep(THREAD_SLEEP_MICROS);

usleep(50 * 1000);

double threadEnd = omp_get_wtime();

threadTime = threadEnd - threadStart;

}

usleep(MAIN_SLEEP_MICROS);

usleep(50 * 1000);

double mainEnd = omp_get_wtime();

double mainTime = mainEnd - mainStart;

double expectedThreadTime = ((double)THREAD_SLEEP_MICROS) / (1000 * 1000);

double expectedMainTime =

expectedThreadTime + (((double)MAIN_SLEEP_MICROS) / (1000 * 1000));

if (mainTime < expectedMainTime) {

printf("Expected main time to be gte than sleep time (%f < %f)\n",

mainTime,

expectedMainTime);

return 1;

} else if (threadTime < expectedThreadTime) {

printf("Expected thread sleep to be gte than sleep time (%f < %f)\n",

threadTime,

expectedThreadTime);

return 1;

} else {

printf("Times as expected: %f >= %f AND %f >= %f\n",

mainTime,

expectedMainTime,

threadTime,

expectedThreadTime);

return 0;

}

}