diff options
| author | bernard.xiong <[email protected]> | 2010-07-13 07:36:37 +0000 |
|---|---|---|
| committer | bernard.xiong <[email protected]> | 2010-07-13 07:36:37 +0000 |
| commit | 214e44c3f9d79e34719cd9cef5e2fc596a693d47 (patch) | |
| tree | 5270f946a824b0d54689953aca65d6039ffaee3b /include/rtdef.h | |
| parent | 69466590ff78faa11ed508d74a5509113b8dace0 (diff) | |
fix down alignment issue; fix the maximal number of rt_scheduler_lock_nest issue; fix rt_tick_from_millisecond issue.
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@790 bbd45198-f89e-11dd-88c7-29a3b14d5316
Diffstat (limited to 'include/rtdef.h')
| -rw-r--r-- | include/rtdef.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/rtdef.h b/include/rtdef.h index 01667001b5..f2f1266de0 100644 --- a/include/rtdef.h +++ b/include/rtdef.h @@ -137,9 +137,14 @@ typedef rt_uint32_t rt_off_t; /* Type for offset. */ /** * @def RT_ALIGN(size, align) * Return the most contiguous size aligned at specified width. RT_ALIGN(13, 4) - * would equal to 16. It is needed in some critical contexts. + * would return 16. + * + * @def RT_ALIGN_DOWN(size, align) + * Return the down number of aligned at specified width. RT_ALIGN_DOWN(13, 4) + * would return 12. */ #define RT_ALIGN(size, align) (((size) + (align) - 1) & ~((align)-1)) +#define RT_ALIGN_DOWN(size, align) ((size) & ~((align) -1)) /** * @def RT_NULL |