mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
3f0bcdc3ef
- Exhaustively document cancellation points - Rename SIGCANCEL to SIGTHR just like BSDs - Further improve POSIX thread cancellations - Ensure asynchronous cancellations work correctly - Elevate the quality of getrandom() and getentropy() - Make futexes cancel correctly on OpenBSD 6.x and 7.x - Add reboot.com and shutdown.com to examples directory - Remove underscore prefix from awesome timespec_*() APIs - Create assertions that help verify our cancellation points - Remove bad timespec APIs (cmp generalizes eq/ne/gt/gte/lt/lte)
57 lines
3.1 KiB
C
57 lines
3.1 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/internal.h"
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#include "libc/calls/sig.internal.h"
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#include "libc/calls/struct/timespec.h"
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#include "libc/calls/struct/timespec.internal.h"
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#include "libc/macros.internal.h"
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#include "libc/nt/synchronization.h"
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#include "libc/sysv/consts/timer.h"
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#include "libc/sysv/errfuns.h"
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textwindows int sys_clock_nanosleep_nt(int clock, int flags,
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const struct timespec *req,
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struct timespec *rem) {
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struct timespec now, abs;
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if (flags & TIMER_ABSTIME) {
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abs = *req;
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for (;;) {
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if (sys_clock_gettime_nt(clock, &now)) return -1;
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if (timespec_cmp(now, abs) >= 0) return 0;
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if (_check_interrupts(false, g_fds.p)) return -1;
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SleepEx(MIN(__SIG_POLLING_INTERVAL_MS,
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timespec_tomillis(timespec_sub(abs, now))),
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false);
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}
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} else {
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if (sys_clock_gettime_nt(clock, &now)) return -1;
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abs = timespec_add(now, *req);
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for (;;) {
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sys_clock_gettime_nt(clock, &now);
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if (timespec_cmp(now, abs) >= 0) return 0;
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if (_check_interrupts(false, g_fds.p)) {
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if (rem) *rem = timespec_sub(abs, now);
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return -1;
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}
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SleepEx(MIN(__SIG_POLLING_INTERVAL_MS,
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timespec_tomillis(timespec_sub(abs, now))),
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false);
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}
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}
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}
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