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394d998315
At least in neovim, `│vi:` is not recognized as a modeline because it has no preceding whitespace. After fixing this, opening a file yields an error because `net` is not an option. (`noet`, however, is.)
42 lines
2.7 KiB
C
42 lines
2.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set noet 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/errno.h"
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#include "libc/thread/thread.h"
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/**
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* Sets size of unmapped pages at bottom of stack.
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*
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* This value will be rounded up to the host microprocessor page size,
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* which is usually 4096 or 16384. It's important to write code in such
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* a way that that code can't skip over the guard area. GCC has warnings
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* like `-Wframe-larger-than=4096 -Walloca-larger-than=4096` which help
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* guarantee your code is safe in this regard. It should be assumed the
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* guard pages exist beneath the stack pointer, rather than the bottom
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* of the stack, since guard pages are also used to grow down commit,
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* which can be poked using CheckLargeStackAllocation().
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*
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* @param guardsize contains guard size in bytes
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* @return 0 on success, or errno on error
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* @raise EINVAL if `guardsize` is zero
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*/
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errno_t pthread_attr_setguardsize(pthread_attr_t *attr, size_t guardsize) {
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if (!guardsize) return EINVAL;
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attr->__guardsize = guardsize;
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return 0;
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}
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