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Add _X_NONNULL macro to annotate when a function expects arguments to be non-null

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This will allow with compiler optimization and better static analysis.

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>
Reviewed-by: Daniel Stone <daniel@fooishbar.org>
This commit is contained in:
Jeremy Huddleston 2011-04-27 17:25:53 -07:00
parent 6648db8f91
commit 217d1dae00
1 changed files with 6 additions and 0 deletions
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6
Xfuncproto.h.in
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@ -122,6 +122,12 @@ in this Software without prior written authorization from The Open Group.
# define _X_ATTRIBUTE_PRINTF(x,y)
#endif
#if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 303)
#define _X_NONNULL(args...) __attribute__((nonnull(args)))
#else
#define _X_NONNULL(...) /* */
#endif
#if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 205)
#define _X_UNUSED __attribute__((__unused__))
#else