glibc/linuxthreads/alloca_cutoff.c

37 lines
1.3 KiB
C
Raw Normal View History

/* Determine whether block of given size can be allocated on the stack or not.
Copyright (C) 2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <alloca.h>
#include <stdlib.h>
#include <sys/param.h>
#include "internals.h"
#include <sysdep-cancel.h>
int
__libc_alloca_cutoff (size_t size)
{
if (! SINGLE_THREAD_P)
{
pthread_descr self = thread_self ();
return size <= LIBC_THREAD_GETMEM (self, p_alloca_cutoff);
}
return size <= __MAX_ALLOCA_CUTOFF;
}