signal.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:5k
- #ifndef _LINUX_SIGNAL_H
- #define _LINUX_SIGNAL_H
- #include <asm/signal.h>
- #include <asm/siginfo.h>
- #ifdef __KERNEL__
- /*
- * Real Time signals may be queued.
- */
- struct sigqueue {
- struct sigqueue *next;
- siginfo_t info;
- };
- struct sigpending {
- struct sigqueue *head, **tail;
- sigset_t signal;
- };
- /*
- * Define some primitives to manipulate sigset_t.
- */
- #ifndef __HAVE_ARCH_SIG_BITOPS
- #include <asm/bitops.h>
- /* We don't use <asm/bitops.h> for these because there is no need to
- be atomic. */
- static inline void sigaddset(sigset_t *set, int _sig)
- {
- unsigned long sig = _sig - 1;
- if (_NSIG_WORDS == 1)
- set->sig[0] |= 1UL << sig;
- else
- set->sig[sig / _NSIG_BPW] |= 1UL << (sig % _NSIG_BPW);
- }
- static inline void sigdelset(sigset_t *set, int _sig)
- {
- unsigned long sig = _sig - 1;
- if (_NSIG_WORDS == 1)
- set->sig[0] &= ~(1UL << sig);
- else
- set->sig[sig / _NSIG_BPW] &= ~(1UL << (sig % _NSIG_BPW));
- }
- static inline int sigismember(sigset_t *set, int _sig)
- {
- unsigned long sig = _sig - 1;
- if (_NSIG_WORDS == 1)
- return 1 & (set->sig[0] >> sig);
- else
- return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
- }
- static inline int sigfindinword(unsigned long word)
- {
- return ffz(~word);
- }
- #define sigmask(sig) (1UL << ((sig) - 1))
- #endif /* __HAVE_ARCH_SIG_BITOPS */
- #ifndef __HAVE_ARCH_SIG_SETOPS
- #include <linux/string.h>
- #define _SIG_SET_BINOP(name, op)
- static inline void name(sigset_t *r, const sigset_t *a, const sigset_t *b)
- {
- unsigned long a0, a1, a2, a3, b0, b1, b2, b3;
- unsigned long i;
-
- for (i = 0; i < _NSIG_WORDS/4; ++i) {
- a0 = a->sig[4*i+0]; a1 = a->sig[4*i+1];
- a2 = a->sig[4*i+2]; a3 = a->sig[4*i+3];
- b0 = b->sig[4*i+0]; b1 = b->sig[4*i+1];
- b2 = b->sig[4*i+2]; b3 = b->sig[4*i+3];
- r->sig[4*i+0] = op(a0, b0);
- r->sig[4*i+1] = op(a1, b1);
- r->sig[4*i+2] = op(a2, b2);
- r->sig[4*i+3] = op(a3, b3);
- }
- switch (_NSIG_WORDS % 4) {
- case 3:
- a0 = a->sig[4*i+0]; a1 = a->sig[4*i+1]; a2 = a->sig[4*i+2];
- b0 = b->sig[4*i+0]; b1 = b->sig[4*i+1]; b2 = b->sig[4*i+2];
- r->sig[4*i+0] = op(a0, b0);
- r->sig[4*i+1] = op(a1, b1);
- r->sig[4*i+2] = op(a2, b2);
- break;
- case 2:
- a0 = a->sig[4*i+0]; a1 = a->sig[4*i+1];
- b0 = b->sig[4*i+0]; b1 = b->sig[4*i+1];
- r->sig[4*i+0] = op(a0, b0);
- r->sig[4*i+1] = op(a1, b1);
- break;
- case 1:
- a0 = a->sig[4*i+0]; b0 = b->sig[4*i+0];
- r->sig[4*i+0] = op(a0, b0);
- break;
- }
- }
- #define _sig_or(x,y) ((x) | (y))
- _SIG_SET_BINOP(sigorsets, _sig_or)
- #define _sig_and(x,y) ((x) & (y))
- _SIG_SET_BINOP(sigandsets, _sig_and)
- #define _sig_nand(x,y) ((x) & ~(y))
- _SIG_SET_BINOP(signandsets, _sig_nand)
- #undef _SIG_SET_BINOP
- #undef _sig_or
- #undef _sig_and
- #undef _sig_nand
- #define _SIG_SET_OP(name, op)
- static inline void name(sigset_t *set)
- {
- unsigned long i;
-
- for (i = 0; i < _NSIG_WORDS/4; ++i) {
- set->sig[4*i+0] = op(set->sig[4*i+0]);
- set->sig[4*i+1] = op(set->sig[4*i+1]);
- set->sig[4*i+2] = op(set->sig[4*i+2]);
- set->sig[4*i+3] = op(set->sig[4*i+3]);
- }
- switch (_NSIG_WORDS % 4) {
- case 3: set->sig[4*i+2] = op(set->sig[4*i+2]);
- case 2: set->sig[4*i+1] = op(set->sig[4*i+1]);
- case 1: set->sig[4*i+0] = op(set->sig[4*i+0]);
- }
- }
- #define _sig_not(x) (~(x))
- _SIG_SET_OP(signotset, _sig_not)
- #undef _SIG_SET_OP
- #undef _sig_not
- static inline void sigemptyset(sigset_t *set)
- {
- switch (_NSIG_WORDS) {
- default:
- memset(set, 0, sizeof(sigset_t));
- break;
- case 2: set->sig[1] = 0;
- case 1: set->sig[0] = 0;
- break;
- }
- }
- static inline void sigfillset(sigset_t *set)
- {
- switch (_NSIG_WORDS) {
- default:
- memset(set, -1, sizeof(sigset_t));
- break;
- case 2: set->sig[1] = -1;
- case 1: set->sig[0] = -1;
- break;
- }
- }
- extern char * render_sigset_t(sigset_t *set, char *buffer);
- /* Some extensions for manipulating the low 32 signals in particular. */
- static inline void sigaddsetmask(sigset_t *set, unsigned long mask)
- {
- set->sig[0] |= mask;
- }
- static inline void sigdelsetmask(sigset_t *set, unsigned long mask)
- {
- set->sig[0] &= ~mask;
- }
- static inline int sigtestsetmask(sigset_t *set, unsigned long mask)
- {
- return (set->sig[0] & mask) != 0;
- }
- static inline void siginitset(sigset_t *set, unsigned long mask)
- {
- set->sig[0] = mask;
- switch (_NSIG_WORDS) {
- default:
- memset(&set->sig[1], 0, sizeof(long)*(_NSIG_WORDS-1));
- break;
- case 2: set->sig[1] = 0;
- case 1: ;
- }
- }
- static inline void siginitsetinv(sigset_t *set, unsigned long mask)
- {
- set->sig[0] = ~mask;
- switch (_NSIG_WORDS) {
- default:
- memset(&set->sig[1], -1, sizeof(long)*(_NSIG_WORDS-1));
- break;
- case 2: set->sig[1] = -1;
- case 1: ;
- }
- }
- #endif /* __HAVE_ARCH_SIG_SETOPS */
- static inline void init_sigpending(struct sigpending *sig)
- {
- sigemptyset(&sig->signal);
- sig->head = NULL;
- sig->tail = &sig->head;
- }
- extern long do_sigpending(void *, unsigned long);
- #endif /* __KERNEL__ */
- #endif /* _LINUX_SIGNAL_H */