test-hrtime.c

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#include "uv.h"
#include "task.h"
 
#ifndef MILLISEC
# define MILLISEC 1000
#endif
 
#ifndef NANOSEC
# define NANOSEC ((uint64_t) 1e9)
#endif
 
 
TEST_IMPL(hrtime) {
  uint64_t a, b, diff;
  int i = 75;
  while (i > 0) {
    a = uv_hrtime();
    uv_sleep(45);
    b = uv_hrtime();
 
    diff = b - a;
 
    /* The windows Sleep() function has only a resolution of 10-20 ms. Check
     * that the difference between the two hrtime values has a reasonable
     * lower bound.
     */
    ASSERT(diff > (uint64_t) 25 * NANOSEC / MILLISEC);
    --i;
  }
  return 0;
}