urbit/outside/libuv/test/test-hrtime.c
2013-09-28 13:21:18 -07:00

55 lines
1.8 KiB
C

/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#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;
/* printf("i= %d diff = %llu\n", i, (unsigned long long int) diff); */
/* The windows Sleep() function has only a resolution of 10-20 ms. */
/* Check that the difference between the two hrtime values is somewhat in */
/* the range we expect it to be. */
ASSERT(diff > (uint64_t) 25 * NANOSEC / MILLISEC);
ASSERT(diff < (uint64_t) 80 * NANOSEC / MILLISEC);
--i;
}
return 0;
}