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adac64a52b
The includes in libc/calls/calls.h have now been refactored so that functions with struct parameters are declared in libc/calls/struct/
42 lines
2.5 KiB
C
42 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 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/bits/weaken.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/intrin/lockcmpxchgp.h"
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#include "libc/intrin/spinlock.h"
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#include "libc/log/log.h"
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#include "libc/runtime/internal.h"
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#include "libc/runtime/runtime.h"
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privileged int _trylock_debug_4(int *lock, const char *lockname,
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const char *file, int line, const char *func) {
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int owner = 0;
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int me = _spinlock_gettid();
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if (_lockcmpxchgp(lock, &owner, me)) {
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return 0;
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} else if (owner != me) {
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return owner;
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} else {
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kprintf("%s:%d: error: lock re-entry on %s in %s()\n", file, line, lockname,
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func);
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if (weaken(__die)) weaken(__die)();
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__restorewintty();
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_Exit(1);
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}
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}
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