michaelh/zephyr
1
0
Fork 0
Code Releases Activity

toolchain/gcc: Add UNALIGNED_GET macro

Browse source 
Similar to PACK_STRUCT it provide safe access to possible unaligned data
but it is much more convenient to use with non-struct types since all
one need to do is add a cast e.g. UNALIGNED_GET((uint16_t *) data).

Change-Id: I46402bdf1dd13081fe340a7214a84750a6cf04d2
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Luiz Augusto von Dentz 2015-05-13 14:42:08 +03:00 • committed by Anas Nashif
commit 9ef64a3112
1 changed files with 9 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

9
include/toolchain/gcc.h
View file

@ -87,6 +87,15 @@
while (0)
#endif /* !CONFIG_UNALIGNED_WRITE_UNSUPPORTED */
/* Unaligned access */
#define UNALIGNED_GET(p) \
__extension__ ({ \
struct __attribute__((__packed__)) { \
__typeof__(*(p)) __v; \
} *__p = (__typeof__(__p)) (p); \
__p->__v; \
})
#define _GENERIC_SECTION(segment) __attribute__((section(#segment)))
#define PACK_STRUCT __attribute__((__packed__))