On Thu, Jul 21, 2016 at 5:12 PM, pavi1729 <[email protected]> wrote: > Hi, > signal.h code and a memset of size 0, is that fine or am I missing > something ?
When _NSIG_WORDS is 1 you enter case 1: which is a nop, so the memset() is not being executed. > > http://lxr.free-electrons.com/source/include/linux/signal.h > > 200 static inline void siginitsetinv(sigset_t *set, unsigned long mask) > 201 { > 202 set->sig[0] = ~mask; > 203 switch (_NSIG_WORDS) { > 204 default: > 205 memset(&set->sig[1], -1, > sizeof(long)*(_NSIG_WORDS-1)); <-- size 0 > 206 break; > 207 case 2: set->sig[1] = -1; > 208 case 1: ; > 209 } > 210 } > > > http://lxr.free-electrons.com/source/arch/ia64/include/asm/signal.h#L16 > 14 #define _NSIG 64 > 15 #define _NSIG_BPW 64 > 16 #define _NSIG_WORDS (_NSIG / _NSIG_BPW) > 17 > > > Thanks, > Pavi -- Thanks, //richard
