mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
853b6c3864
- Wrap clock_getres() - Wrap sched_setscheduler() - Make sleep() api conformant - Polyfill sleep() using select() - Improve clock_gettime() polyfill - Make nanosleep() POSIX conformant - Slightly improve some DNS functions - Further strengthen pledge() sandboxing - Improve rounding of timeval / timespec - Allow layering of pledge() calls on Linux - Polyfill sched_yield() using select() on XNU - Delete more system constants we probably don't need
45 lines
2.6 KiB
C
45 lines
2.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2022 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or 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. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/calls/struct/timespec.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/fmt/conv.h"
|
|
|
|
// we don't want instrumentation because:
|
|
// - nanosleep() depends on this and ftrace can take microsecs
|
|
|
|
/**
|
|
* Converts `struct timespec` to `struct timeval`.
|
|
*
|
|
* This divides ts.tv_nsec by 1000 with upward rounding and overflow
|
|
* handling. Your ts.tv_nsec must be on the interval `[0,1000000000)`
|
|
* otherwise `{-1, -1}` is returned.
|
|
*
|
|
* @return converted timeval whose tv_usec will be -1 on error
|
|
*/
|
|
noinstrument struct timeval _timespec2timeval(struct timespec ts) {
|
|
if (0 <= ts.tv_nsec && ts.tv_nsec < 1000000000) {
|
|
if (0 <= ts.tv_nsec && ts.tv_nsec < 1000000000 - 999) {
|
|
return (struct timeval){ts.tv_sec, (ts.tv_nsec + 999) / 1000};
|
|
} else {
|
|
return (struct timeval){ts.tv_sec + 1, 0};
|
|
}
|
|
} else {
|
|
return (struct timeval){-1, -1};
|
|
}
|
|
}
|