sortix-mirror/libc/time/clock.c

32 lines
1.2 KiB
C

/*
* Copyright (c) 201 Jonas 'Sortie' Termansen.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* time/clock.c
* Get process execution time.
*/
#include <assert.h>
#include <time.h>
// TODO: This function is crap and has been replaced by clock_gettime.
clock_t clock(void)
{
struct timespec now;
if ( clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &now) < 0 )
return -1;
static_assert(CLOCKS_PER_SEC == 1000000, "CLOCKS_PER_SEC == 1000000");
return (clock_t) now.tv_sec * 1000000 + (clock_t) now.tv_sec / 1000;
}