mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 03:27:39 +00:00
c995838e5c
- Clean up sigaction() code - Add a port scanner example - Introduce a ParseCidr() API - Clean up our futex abstraction code - Fix a harmless integer overflow in ParseIp() - Use kernel semaphores on NetBSD to make threads much faster
64 lines
3 KiB
C
64 lines
3 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 2016 Google Inc. │
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│ │
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│ Licensed under the Apache License, Version 2.0 (the "License"); │
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│ you may not use this file except in compliance with the License. │
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│ You may obtain a copy of the License at │
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│ │
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│ http://www.apache.org/licenses/LICENSE-2.0 │
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│ │
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│ Unless required by applicable law or agreed to in writing, software │
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│ distributed under the License is distributed on an "AS IS" BASIS, │
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│ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. │
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│ See the License for the specific language governing permissions and │
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│ limitations under the License. │
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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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asm(".ident\t\"\\n\\n\
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*NSYNC (Apache 2.0)\\n\
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Copyright 2016 Google, Inc.\\n\
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https://github.com/google/nsync\"");
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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 (IsNetbsd ()) {
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return nsync_mu_semaphore_init_sem (s);
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} else {
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return nsync_mu_semaphore_init_futex (s);
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}
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}
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/* Wait until the count of *s exceeds 0, and decrement it. */
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errno_t nsync_mu_semaphore_p (nsync_semaphore *s) {
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if (IsNetbsd ()) {
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return nsync_mu_semaphore_p_sem (s);
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} else {
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return nsync_mu_semaphore_p_futex (s);
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}
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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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errno_t nsync_mu_semaphore_p_with_deadline (nsync_semaphore *s, nsync_time abs_deadline) {
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if (IsNetbsd ()) {
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return nsync_mu_semaphore_p_with_deadline_sem (s, abs_deadline);
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} else {
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return nsync_mu_semaphore_p_with_deadline_futex (s, abs_deadline);
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}
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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 (IsNetbsd ()) {
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return nsync_mu_semaphore_v_sem (s);
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} else {
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return nsync_mu_semaphore_v_futex (s);
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}
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}
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