glibc/nptl/alloca_cutoff.c
Roland McGrath 28ddcea013 2005-02-25 Roland McGrath <roland@redhat.com>
* alloca_cutoff.c: Correct license text.
	* tst-unload.c: Likewise.
	* sysdeps/pthread/allocalim.h: Likewise.
	* sysdeps/pthread/pt-initfini.c: Likewise.
	* sysdeps/pthread/bits/libc-lock.h: Likewise.
	* sysdeps/pthread/bits/sigthread.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/local_lim.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/posix_opt.h: Likewise.
2005-02-26 01:33:57 +00:00

37 lines
1.4 KiB
C

/* Determine whether block of given size can be allocated on the stack or not.
Copyright (C) 2002 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 <pthreadP.h>
int
__libc_alloca_cutoff (size_t size)
{
return size <= (MIN (__MAX_ALLOCA_CUTOFF,
THREAD_GETMEM (THREAD_SELF, stackblock_size) / 4
/* The main thread, before the thread library is
initialized, has zero in the stackblock_size
element. Since it is the main thread we can
assume the maximum available stack space. */
?: __MAX_ALLOCA_CUTOFF * 4));
}