From 03db654393eca606a0b3d9a6010892c03e243a87 Mon Sep 17 00:00:00 2001 From: Joao Matos Date: Thu, 4 Apr 2019 11:04:08 -0600 Subject: [PATCH] include/alloca.h: Add alloca.h. Included limited implmentation of alloc() that is only available for GCC versions 3 and above. --- include/alloca.h | 52 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 include/alloca.h diff --git a/include/alloca.h b/include/alloca.h new file mode 100644 index 0000000000..5b75db2427 --- /dev/null +++ b/include/alloca.h @@ -0,0 +1,52 @@ +/**************************************************************************** + * include/alloca.h + * + * Copyright (C) 2019 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +#ifndef __INCLUDE_ALLOCA_H +#define __INCLUDE_ALLOCA_H + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +#if defined(__GNUC__) && __GNUC__ >= 3 +/* Use GCC >=3 Built-in for alloca */ + +# undef alloca +# undef __alloca +# define alloca(size) __alloca(size) +# define __alloca(size) __builtin_alloca(size) +#endif + +#endif /* __INCLUDE_ALLOCA_H */