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https://github.com/jart/cosmopolitan.git
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56 lines
2.9 KiB
C
56 lines
2.9 KiB
C
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
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│vi: set et ft=c ts=8 tw=8 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/dce.h"
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#include "third_party/nsync/mu_semaphore.h"
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#include "third_party/nsync/mu_semaphore.internal.h"
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// clang-format off
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/* Initialize *s; the initial value is 0. */
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void nsync_mu_semaphore_init (nsync_semaphore *s) {
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if (!IsWindows ())
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nsync_mu_semaphore_init_futex (s);
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else
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nsync_mu_semaphore_init_win32 (s);
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}
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/* Wait until the count of *s exceeds 0, and decrement it. */
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void nsync_mu_semaphore_p (nsync_semaphore *s) {
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if (!IsWindows ())
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nsync_mu_semaphore_p_futex (s);
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else
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nsync_mu_semaphore_p_win32 (s);
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}
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/* Wait until one of:
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the count of *s is non-zero, in which case decrement *s and return 0;
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or abs_deadline expires, in which case return ETIMEDOUT. */
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int nsync_mu_semaphore_p_with_deadline (nsync_semaphore *s, nsync_time abs_deadline) {
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if (!IsWindows ())
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return nsync_mu_semaphore_p_with_deadline_futex (s, abs_deadline);
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else
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return nsync_mu_semaphore_p_with_deadline_win32 (s, abs_deadline);
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}
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/* Ensure that the count of *s is at least 1. */
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void nsync_mu_semaphore_v (nsync_semaphore *s) {
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if (!IsWindows ())
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nsync_mu_semaphore_v_futex (s);
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else
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nsync_mu_semaphore_v_win32 (s);
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}
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