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use builtin va_arg in GCC 4.x 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1400 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong 2011-05-09 02:50:01 +00:00
parent 8e5f428777
commit 43a6a907da
1 changed files with 20 additions and 11 deletions
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31
include/rtdef.h
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@ -13,6 +13,7 @@
* 2008-07-12 Bernard remove all rt_int8, rt_uint32_t etc typedef
* 2010-10-26 yi.qiu add module support
* 2010-11-10 Bernard add cleanup callback function in thread exit.
* 2011-05-09 Bernard use builtin va_arg in GCC 4.x
*/
#ifndef __RT_DEF_H__
#define __RT_DEF_H__
@ -97,17 +98,25 @@ typedef rt_uint32_t rt_off_t; /**< Type for offset */
#ifdef RT_USING_NEWLIB
#include <stdarg.h>
#else
typedef void *__sys_va_list;
typedef __sys_va_list va_list;
#define __va_rounded_size(type) \
(((sizeof (type) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))
#define va_start(ap, lastarg) \
(ap = ((char *) &(lastarg) + __va_rounded_size(lastarg)))
#define va_end(ap) ((void)0)
/* little endian */
#define va_arg(ap, type) \
(ap = (__sys_va_list) ((char *) (ap) + __va_rounded_size (type)), \
*((type *) (void *) ((char *) (ap) - __va_rounded_size (type))))
#if __GNUC__ < 4
typedef void *__sys_va_list;
typedef __sys_va_list va_list;
#define __va_rounded_size(type) \
(((sizeof (type) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))
#define va_start(ap, lastarg) \
(ap = ((char *) &(lastarg) + __va_rounded_size(lastarg)))
#define va_end(ap) ((void)0)
/* little endian */
#define va_arg(ap, type) \
(ap = (__sys_va_list) ((char *) (ap) + __va_rounded_size (type)), \
*((type *) (void *) ((char *) (ap) - __va_rounded_size (type))))
#else
typedef __builtin_va_list __gnuc_va_list;
typedef __gnuc_va_list va_list;
#define va_start(v,l) __builtin_va_start(v,l)
#define va_end(v) __builtin_va_end(v)
#define va_arg(v,l) __builtin_va_arg(v,l)
#endif
#endif
#define SECTION(x) __attribute__((section(x)))