45 lines
1.8 KiB
C
45 lines
1.8 KiB
C
/* Determine whether block of given size can be allocated on the stack or not.
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Copyright (C) 2002-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, see <http://www.gnu.org/licenses/>. */
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#include <alloca.h>
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#include <limits.h>
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/* Take into account that "lcc" configured with ECOMP_SUPPORT_0EH doesn't allow
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for inlining at `-O0' which has been traditionally dependent on EDG frontend
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and isn't supported by the latter unless "full portable lowering of exception
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handling" has been enabled (see Bug #83209, Comment #1). To let one still
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compile glibc without optimizations in such a case and avoid a linkage
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failure, stupidly replace `extern __always_inline' with `static'. */
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#if ! defined __LCC__
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extern __always_inline
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#else
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/* Take care of eliminating a warning if this function turns out to be
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unused. */
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static int __libc_use_alloca (size_t size) __attribute__ ((unused));
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static
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#endif
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int
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__libc_use_alloca (size_t size)
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{
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return (__glibc_likely (__libc_alloca_cutoff (size))
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#ifdef PTHREAD_STACK_MIN
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|| __glibc_likely (size <= PTHREAD_STACK_MIN / 4)
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#endif
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);
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}
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