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e16a7d8f3b
`et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
71 lines
3.7 KiB
C
71 lines
3.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et 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/assert.h"
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#include "libc/intrin/atomic.h"
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#include "libc/mem/mem.h"
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#include "libc/thread/posixthread.internal.h"
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#include "libc/thread/thread.h"
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#include "libc/thread/tls.h"
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// this is a legacy api so we avoid making the tib 1024 bytes larger
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static void pthread_key_init(void) {
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if (!__get_tls()->tib_keys) {
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__get_tls()->tib_keys = calloc(PTHREAD_KEYS_MAX, sizeof(void *));
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}
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}
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/**
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* Sets value of TLS slot for current thread.
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*
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* If `k` wasn't created by pthread_key_create() then the behavior is
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* undefined. If `k` was unregistered earlier by pthread_key_delete()
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* then the behavior is undefined.
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*/
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int pthread_setspecific(pthread_key_t k, const void *val) {
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// "The effect of calling pthread_getspecific() or
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// pthread_setspecific() with a key value not obtained from
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// pthread_key_create() or after key has been deleted with
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// pthread_key_delete() is undefined."
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// ──Quoth POSIX.1-2017
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pthread_key_init();
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unassert(0 <= k && k < PTHREAD_KEYS_MAX);
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unassert(atomic_load_explicit(_pthread_key_dtor + k, memory_order_acquire));
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__get_tls()->tib_keys[k] = (void *)val;
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return 0;
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}
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/**
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* Gets value of TLS slot for current thread.
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*
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* If `k` wasn't created by pthread_key_create() then the behavior is
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* undefined. If `k` was unregistered earlier by pthread_key_delete()
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* then the behavior is undefined.
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*/
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void *pthread_getspecific(pthread_key_t k) {
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// "The effect of calling pthread_getspecific() or
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// pthread_setspecific() with a key value not obtained from
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// pthread_key_create() or after key has been deleted with
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// pthread_key_delete() is undefined."
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// ──Quoth POSIX.1-2017
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pthread_key_init();
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unassert(0 <= k && k < PTHREAD_KEYS_MAX);
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unassert(atomic_load_explicit(_pthread_key_dtor + k, memory_order_acquire));
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return __get_tls()->tib_keys[k];
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}
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