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authorUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
committerUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
commita334319f6530564d22e775935d9c91663623a1b4 (patch)
treeb5877475619e4c938e98757d518bb1e9cbead751 /linuxthreads/alloca_cutoff.c
parent0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (diff)
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(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.
Diffstat (limited to 'linuxthreads/alloca_cutoff.c')
-rw-r--r--linuxthreads/alloca_cutoff.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/linuxthreads/alloca_cutoff.c b/linuxthreads/alloca_cutoff.c
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--- /dev/null
+++ b/linuxthreads/alloca_cutoff.c
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+/* 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;
+}