sysmo-bts
/
barebox
9
0
Fork 0
Code Releases Activity

common.h: add compile time check helper functions 

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Marc Kleine-Budde 2010-02-09 17:33:50 +01:00
parent aadc4c2990
commit 6351ff2eff
1 changed files with 29 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
include/common.h
View File

@ -45,7 +45,7 @@
#ifdef DEBUG
#define pr_debug(fmt, arg...) printf(fmt, ##arg)
#else
#define pr_debug(fmt, arg...) do {} while(0)
#define pr_debug(fmt, arg...) do {} while(0)
#endif
#define debug(fmt, arg...) pr_debug(fmt, ##arg)
@ -138,7 +138,32 @@ int arch_execute(void *, int argc, char *argv[]);
int run_shell(void);
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
/* Force a compilation error if condition is true */
#define BUILD_BUG_ON(condition) ((void)BUILD_BUG_ON_ZERO(condition))
/* Force a compilation error if condition is constant and true */
#define MAYBE_BUILD_BUG_ON(cond) ((void)sizeof(char[1 - 2 * !!(cond)]))
/* Force a compilation error if a constant expression is not a power of 2 */
#define BUILD_BUG_ON_NOT_POWER_OF_2(n) \
BUILD_BUG_ON((n) == 0 || (((n) & ((n) - 1)) != 0))
/*
* Force a compilation error if condition is true, but also produce a
* result (of value 0 and type size_t), so the expression can be used
* e.g. in a structure initializer (or where-ever else comma
* expressions aren't permitted).
*/
#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))
#define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1)
#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
#define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a)))
#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
#define ARRAY_AND_SIZE(x) (x), ARRAY_SIZE(x)
/**
* container_of - cast a member of a structure out to the containing structure
@ -164,4 +189,6 @@ int run_shell(void);
#define LLONG_MIN (-LLONG_MAX - 1)
#define ULLONG_MAX (~0ULL)
#define PAGE_SIZE 4096
#endif /* __COMMON_H_ */