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40 lines
2.6 KiB
C
40 lines
2.6 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 2022 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/strace.internal.h"
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#include "libc/calls/struct/timespec.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/sock/internal.h"
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#include "libc/sock/select.h"
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/**
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* Does what poll() does except with bitset API.
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*
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* This system call is supported on all platforms. It's like select()
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* except that it atomically changes the sigprocmask() during the op.
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*/
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int pselect(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
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const struct timespec *timeout, const sigset_t *sigmask) {
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int rc;
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sigset_t oldmask;
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rc = sys_pselect(nfds, readfds, writefds, exceptfds, timeout, sigmask);
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POLLTRACE("pselect(%d, %p, %p, %p, [%s], %s) → %d% m", nfds, readfds,
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writefds, exceptfds, DescribeTimeval(rc, timeout),
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DescribeSigset(0, sigmask), rc);
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return rc;
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}
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