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/* ==========================================================================
Licensed under BSD 2clause license See LICENSE file for more information
Author: Michał Łyszczek <michal.lyszczek@bofc.pl>
==========================================================================
-------------------------------------------------------
/ This file contains some common utils code that can be \
\ shared between lib: programs and tests /
-------------------------------------------------------
\ . .
\ / `. .' "
\ .---. < > < > .---.
\ | \ \ - ~ ~ - / / |
_____ ..-~ ~-..-~
| | \~~~\.' `./~~~/
--------- \__/ \__/
.' O \ / / \ "
(_____, `._.' | } \/~~~/
`----. / } | / \__/
`-. | / | / `. ,~~|
~-.__| /_ - ~ ^| /- _ `..-'
| / | / ~-. `-. _ _ _
|_____| |_____| ~ - . _ _ _ _ _>
==========================================================================
_ __ __ ____ _ __
(_)____ _____ / /__ __ ____/ /___ / __/(_)/ /___ _____
/ // __ \ / ___// // / / // __ // _ \ / /_ / // // _ \ / ___/
/ // / / // /__ / // /_/ // /_/ // __/ / __// // // __/(__ )
/_//_/ /_/ \___//_/ \__,_/ \__,_/ \___/ /_/ /_//_/ \___//____/
========================================================================== */
#include <sys/time.h>
#include <time.h>
/* ==========================================================================
____ __ _
/ __/__ __ ____ _____ / /_ (_)____ ____ _____
/ /_ / / / // __ \ / ___// __// // __ \ / __ \ / ___/
/ __// /_/ // / / // /__ / /_ / // /_/ // / / /(__ )
/_/ \__,_//_/ /_/ \___/ \__//_/ \____//_/ /_//____/
========================================================================== */
/* ==========================================================================
Converts millisecond into absolute timespec time. If ms is 0, return tp
with values set to 0, which is 1970.01.01, when this is passed to
mq_timedreceive(), function will timeout immediately
========================================================================== */
void psmq_ms_to_tp
(
size_t ms, /* time in milliseconds */
struct timespec *tp /* ms will be converted to tp here */
)
{
size_t nsec; /* number of nanoseconds to add to timer */
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
tp->tv_sec = 0;
tp->tv_nsec = 0;
if (!ms) return;
clock_gettime(CLOCK_REALTIME, tp);
nsec = ms % 1000;
nsec *= 1000000l;
tp->tv_sec += ms / 1000;
tp->tv_nsec += nsec;
if (tp->tv_nsec >= 1000000000l)
{
/* overflow on nsec part */
tp->tv_nsec -= 1000000000l;
tp->tv_sec += 1;
}
}
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