WebSVN - shark - Blame - Rev 1618 - /shark/branches/xen/drivers/linuxc26/include/linux/signal.h

Rev	Author	Line No.	Line
422	giacomo	1	#ifndef _LINUX_SIGNAL_H
		2	#define _LINUX_SIGNAL_H
		3
		4	#include <linux/list.h>
		5	#include <linux/spinlock.h>
		6	#include <asm/signal.h>
		7	#include <asm/siginfo.h>
		8
		9	#ifdef __KERNEL__
		10	/*
		11	* Real Time signals may be queued.
		12	*/
		13
		14	struct sigqueue {
		15	struct list_head list;
		16	spinlock_t *lock;
		17	int flags;
		18	siginfo_t info;
		19	};
		20
		21	/* flags values. */
		22	#define SIGQUEUE_PREALLOC 1
		23
		24	struct sigpending {
		25	struct list_head list;
		26	sigset_t signal;
		27	};
		28
		29	/*
		30	* Define some primitives to manipulate sigset_t.
		31	*/
		32
		33	#ifndef __HAVE_ARCH_SIG_BITOPS
		34	#include <linux/bitops.h>
		35
		36	/* We don't use <linux/bitops.h> for these because there is no need to
		37	be atomic. */
		38	static inline void sigaddset(sigset_t *set, int _sig)
		39	{
		40	unsigned long sig = _sig - 1;
		41	if (_NSIG_WORDS == 1)
		42	set->sig[0] \|= 1UL << sig;
		43	else
		44	set->sig[sig / _NSIG_BPW] \|= 1UL << (sig % _NSIG_BPW);
		45	}
		46
		47	static inline void sigdelset(sigset_t *set, int _sig)
		48	{
		49	unsigned long sig = _sig - 1;
		50	if (_NSIG_WORDS == 1)
		51	set->sig[0] &= ~(1UL << sig);
		52	else
		53	set->sig[sig / _NSIG_BPW] &= ~(1UL << (sig % _NSIG_BPW));
		54	}
		55
		56	static inline int sigismember(sigset_t *set, int _sig)
		57	{
		58	unsigned long sig = _sig - 1;
		59	if (_NSIG_WORDS == 1)
		60	return 1 & (set->sig[0] >> sig);
		61	else
		62	return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
		63	}
		64
		65	static inline int sigfindinword(unsigned long word)
		66	{
		67	return ffz(~word);
		68	}
		69
		70	#endif /* __HAVE_ARCH_SIG_BITOPS */
		71
		72	#define sigmask(sig) (1UL << ((sig) - 1))
		73
		74	#ifndef __HAVE_ARCH_SIG_SETOPS
		75	#include <linux/string.h>
		76
		77	#define _SIG_SET_BINOP(name, op) \
		78	static inline void name(sigset_t r, const sigset_t a, const sigset_t *b) \
		79	{ \
		80	extern void _NSIG_WORDS_is_unsupported_size(void); \
		81	unsigned long a0, a1, a2, a3, b0, b1, b2, b3; \
		82	\
		83	switch (_NSIG_WORDS) { \
		84	case 4: \
		85	a3 = a->sig[3]; a2 = a->sig[2]; \
		86	b3 = b->sig[3]; b2 = b->sig[2]; \
		87	r->sig[3] = op(a3, b3); \
		88	r->sig[2] = op(a2, b2); \
		89	case 2: \
		90	a1 = a->sig[1]; b1 = b->sig[1]; \
		91	r->sig[1] = op(a1, b1); \
		92	case 1: \
		93	a0 = a->sig[0]; b0 = b->sig[0]; \
		94	r->sig[0] = op(a0, b0); \
		95	break; \
		96	default: \
		97	_NSIG_WORDS_is_unsupported_size(); \
		98	} \
		99	}
		100
		101	#define _sig_or(x,y) ((x) \| (y))
		102	_SIG_SET_BINOP(sigorsets, _sig_or)
		103
		104	#define _sig_and(x,y) ((x) & (y))
		105	_SIG_SET_BINOP(sigandsets, _sig_and)
		106
		107	#define _sig_nand(x,y) ((x) & ~(y))
		108	_SIG_SET_BINOP(signandsets, _sig_nand)
		109
		110	#undef _SIG_SET_BINOP
		111	#undef _sig_or
		112	#undef _sig_and
		113	#undef _sig_nand
		114
		115	#define _SIG_SET_OP(name, op) \
		116	static inline void name(sigset_t *set) \
		117	{ \
		118	extern void _NSIG_WORDS_is_unsupported_size(void); \
		119	\
		120	switch (_NSIG_WORDS) { \
		121	case 4: set->sig[3] = op(set->sig[3]); \
		122	set->sig[2] = op(set->sig[2]); \
		123	case 2: set->sig[1] = op(set->sig[1]); \
		124	case 1: set->sig[0] = op(set->sig[0]); \
		125	break; \
		126	default: \
		127	_NSIG_WORDS_is_unsupported_size(); \
		128	} \
		129	}
		130
		131	#define _sig_not(x) (~(x))
		132	_SIG_SET_OP(signotset, _sig_not)
		133
		134	#undef _SIG_SET_OP
		135	#undef _sig_not
		136
		137	static inline void sigemptyset(sigset_t *set)
		138	{
		139	switch (_NSIG_WORDS) {
		140	default:
		141	memset(set, 0, sizeof(sigset_t));
		142	break;
		143	case 2: set->sig[1] = 0;
		144	case 1: set->sig[0] = 0;
		145	break;
		146	}
		147	}
		148
		149	static inline void sigfillset(sigset_t *set)
		150	{
		151	switch (_NSIG_WORDS) {
		152	default:
		153	memset(set, -1, sizeof(sigset_t));
		154	break;
		155	case 2: set->sig[1] = -1;
		156	case 1: set->sig[0] = -1;
		157	break;
		158	}
		159	}
		160
		161	/* Some extensions for manipulating the low 32 signals in particular. */
		162
		163	static inline void sigaddsetmask(sigset_t *set, unsigned long mask)
		164	{
		165	set->sig[0] \|= mask;
		166	}
		167
		168	static inline void sigdelsetmask(sigset_t *set, unsigned long mask)
		169	{
		170	set->sig[0] &= ~mask;
		171	}
		172
		173	static inline int sigtestsetmask(sigset_t *set, unsigned long mask)
		174	{
		175	return (set->sig[0] & mask) != 0;
		176	}
		177
		178	static inline void siginitset(sigset_t *set, unsigned long mask)
		179	{
		180	set->sig[0] = mask;
		181	switch (_NSIG_WORDS) {
		182	default:
		183	memset(&set->sig[1], 0, sizeof(long)*(_NSIG_WORDS-1));
		184	break;
		185	case 2: set->sig[1] = 0;
		186	case 1: ;
		187	}
		188	}
		189
		190	static inline void siginitsetinv(sigset_t *set, unsigned long mask)
		191	{
		192	set->sig[0] = ~mask;
		193	switch (_NSIG_WORDS) {
		194	default:
		195	memset(&set->sig[1], -1, sizeof(long)*(_NSIG_WORDS-1));
		196	break;
		197	case 2: set->sig[1] = -1;
		198	case 1: ;
		199	}
		200	}
		201
		202	#endif /* __HAVE_ARCH_SIG_SETOPS */
		203
		204	static inline void init_sigpending(struct sigpending *sig)
		205	{
		206	sigemptyset(&sig->signal);
		207	INIT_LIST_HEAD(&sig->list);
		208	}
		209
		210	extern long do_sigpending(void __user *, unsigned long);
		211	extern int sigprocmask(int, sigset_t , sigset_t );
		212
		213	#ifndef HAVE_ARCH_GET_SIGNAL_TO_DELIVER
		214	struct pt_regs;
		215	extern int get_signal_to_deliver(siginfo_t info, struct pt_regs regs, void *cookie);
		216	#endif
		217
		218	#endif /* __KERNEL__ */
		219
		220	#endif /* _LINUX_SIGNAL_H */

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