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50 lines
2.5 KiB
C
50 lines
2.5 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 2024 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/atomic.h"
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#include "libc/macros.internal.h"
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#include "libc/runtime/runtime.h"
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#include "libc/thread/thread.h"
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static void (*funcs[32])(void);
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static int count;
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static pthread_spinlock_t lock;
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pthread_spinlock_t *const __at_quick_exit_lockptr = &lock;
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void __funcs_on_quick_exit(void) {
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void (*func)(void);
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pthread_spin_lock(&lock);
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while (count) {
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func = funcs[--count];
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pthread_spin_unlock(&lock);
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func();
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pthread_spin_lock(&lock);
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}
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}
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int at_quick_exit(void func(void)) {
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int res = 0;
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pthread_spin_lock(&lock);
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if (count == ARRAYLEN(funcs)) {
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res = -1;
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} else {
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funcs[count++] = func;
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}
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pthread_spin_unlock(&lock);
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return res;
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}
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