diff options
Diffstat (limited to 'REORG.TODO/nptl/alloca_cutoff.c')
| -rw-r--r-- | REORG.TODO/nptl/alloca_cutoff.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/REORG.TODO/nptl/alloca_cutoff.c b/REORG.TODO/nptl/alloca_cutoff.c new file mode 100644 index 0000000000..f2ae1a8e85 --- /dev/null +++ b/REORG.TODO/nptl/alloca_cutoff.c @@ -0,0 +1,36 @@ +/* Determine whether block of given size can be allocated on the stack or not. + Copyright (C) 2002-2017 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, see <http://www.gnu.org/licenses/>. */ + +#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)); +} +libc_hidden_def (__libc_alloca_cutoff) |