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head/contrib/ntp/include/safecast.h
| Property | Old Value | New Value |
|---|---|---|
| svn:eol-style | null | native \ No newline at end of property |
| svn:keywords | null | FreeBSD=%H \ No newline at end of property |
| svn:mime-type | null | text/plain \ No newline at end of property |
| #ifndef SAFECAST_H | |||||
| #define SAFECAST_H | |||||
| #include <limits.h> | |||||
| static inline int size2int_chk(size_t v) | |||||
| { | |||||
| if (v > INT_MAX) | |||||
| abort(); | |||||
| return (int)(v); | |||||
| } | |||||
| static inline int size2int_sat(size_t v) | |||||
| { | |||||
| return (v > INT_MAX) ? INT_MAX : (int)v; | |||||
| } | |||||
| /* Compilers can emit warning about increased alignment requirements | |||||
| * when casting pointers. The impact is tricky: on machines where | |||||
| * alignment is just a performance issue (x86,x64,...) this might just | |||||
| * cause a performance penalty. On others, an address error can occur | |||||
| * and the process dies... | |||||
| * | |||||
| * Still, there are many cases where the pointer arithmetic and the | |||||
| * buffer alignment make sure this does not happen. OTOH, the compiler | |||||
| * doesn't know this and still emits warnings. | |||||
| * | |||||
| * The following cast macros are going through void pointers to tell | |||||
| * the compiler that there is no alignment requirement to watch. | |||||
| */ | |||||
| #define UA_PTR(ptype,pval) ((ptype *)(void*)(pval)) | |||||
| #define UAC_PTR(ptype,pval) ((const ptype *)(const void*)(pval)) | |||||
| #define UAV_PTR(ptype,pval) ((volatile ptype *)(volatile void*)(pval)) | |||||
| #endif | |||||