mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
33d280c8ba
- Blocking read operations on the Windows Console can now EINTR - Blocking read operations on Windows pipes now EINTR more reliably - setitimer() will no longer be inherited across fork() on Windows - It's now possible to use ECHO when the console is in raw mode - The ECHOCTL flag now works correctly on the Windows Console - The ICRNL flag now works correctly on the Windows Console - pread() and pwrite() will now raise ESPIPE on Windows - Opening /dev/tty on Windows is improved (untested) - Overlapped I/O is now implemented in a better way
77 lines
3.6 KiB
C
77 lines
3.6 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 2020 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/sig.internal.h"
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#include "libc/calls/struct/itimerval.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/itimer.h"
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#include "libc/sysv/consts/sicode.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/sysv/errfuns.h"
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#ifdef __x86_64__
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static struct itimerval g_setitimer;
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textwindows void _check_sigalrm(void) {
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struct timeval now;
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if (timeval_iszero(g_setitimer.it_value)) return;
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now = timeval_real();
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if (timeval_cmp(now, g_setitimer.it_value) < 0) return;
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if (timeval_iszero(g_setitimer.it_interval)) {
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g_setitimer.it_value = timeval_zero;
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} else {
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do {
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g_setitimer.it_value =
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timeval_add(g_setitimer.it_value, g_setitimer.it_interval);
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} while (timeval_cmp(now, g_setitimer.it_value) > 0);
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}
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__sig_add(0, SIGALRM, SI_TIMER);
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}
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textwindows void sys_setitimer_nt_reset(void) {
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// this function is called by fork(), because
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// timers aren't inherited by forked subprocesses
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bzero(&g_setitimer, sizeof(g_setitimer));
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}
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textwindows int sys_setitimer_nt(int which, const struct itimerval *neu,
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struct itimerval *old) {
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struct itimerval config;
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if (which != ITIMER_REAL || (neu && (!timeval_isvalid(neu->it_value) ||
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!timeval_isvalid(neu->it_interval)))) {
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return einval();
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}
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if (neu) {
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// POSIX defines setitimer() with the restrict keyword but let's
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// accommodate the usage setitimer(ITIMER_REAL, &it, &it) anyway
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config = *neu;
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}
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if (old) {
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old->it_interval = g_setitimer.it_interval;
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old->it_value = timeval_subz(g_setitimer.it_value, timeval_real());
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}
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if (neu) {
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if (!timeval_iszero(config.it_value)) {
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config.it_value = timeval_add(config.it_value, timeval_real());
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}
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g_setitimer = config;
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}
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return 0;
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}
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#endif /* __x86_64__ */
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