[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / signal.h

#ifndef _LINUX_SIGNAL_H
#define _LINUX_SIGNAL_H

#include <asm/signal.h>
#include <asm/siginfo.h>

#ifdef __KERNEL__
#include <linux/list.h>
#include <linux/spinlock.h>

/*
 * Real Time signals may be queued.
 */

struct sigqueue {
	struct list_head list;
	int flags;
	siginfo_t info;
	struct user_struct *user;
};

/* flags values. */
#define SIGQUEUE_PREALLOC	1

struct sigpending {
	struct list_head list;
	sigset_t signal;
};

/*
 * Define some primitives to manipulate sigset_t.
 */

#ifndef __HAVE_ARCH_SIG_BITOPS
#include <linux/bitops.h>

/* We don't use <linux/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);
}

#endif /* __HAVE_ARCH_SIG_BITOPS */

static inline int sigisemptyset(sigset_t *set)
{
	extern void _NSIG_WORDS_is_unsupported_size(void);
	switch (_NSIG_WORDS) {
	case 4:
		return (set->sig[3] | set->sig[2] |
			set->sig[1] | set->sig[0]) == 0;
	case 2:
		return (set->sig[1] | set->sig[0]) == 0;
	case 1:
		return set->sig[0] == 0;
	default:
		_NSIG_WORDS_is_unsupported_size();
		return 0;
	}
}

#define sigmask(sig)	(1UL << ((sig) - 1))

#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) \
{									\
	extern void _NSIG_WORDS_is_unsupported_size(void);		\
	unsigned long a0, a1, a2, a3, b0, b1, b2, b3;			\
									\
	switch (_NSIG_WORDS) {						\
	    case 4:							\
		a3 = a->sig[3]; a2 = a->sig[2];				\
		b3 = b->sig[3]; b2 = b->sig[2];				\
		r->sig[3] = op(a3, b3);					\
		r->sig[2] = op(a2, b2);					\
	    case 2:							\
		a1 = a->sig[1]; b1 = b->sig[1];				\
		r->sig[1] = op(a1, b1);					\
	    case 1:							\
		a0 = a->sig[0]; b0 = b->sig[0];				\
		r->sig[0] = op(a0, b0);					\
		break;							\
	    default:							\
		_NSIG_WORDS_is_unsupported_size();			\
	}								\
}

#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)					\
{									\
	extern void _NSIG_WORDS_is_unsupported_size(void);		\
									\
	switch (_NSIG_WORDS) {						\
	    case 4: set->sig[3] = op(set->sig[3]);			\
		    set->sig[2] = op(set->sig[2]);			\
	    case 2: set->sig[1] = op(set->sig[1]);			\
	    case 1: set->sig[0] = op(set->sig[0]);			\
		    break;						\
	    default:							\
		_NSIG_WORDS_is_unsupported_size();			\
	}								\
}

#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;
	}
}

/* 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);
	INIT_LIST_HEAD(&sig->list);
}

extern void flush_sigqueue(struct sigpending *queue);

/* Test if 'sig' is valid signal. Use this instead of testing _NSIG directly */
static inline int valid_signal(unsigned long sig)
{
	return sig <= _NSIG ? 1 : 0;
}

extern int group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p);
extern int __group_send_sig_info(int, struct siginfo *, struct task_struct *);
extern long do_sigpending(void __user *, unsigned long);
extern int sigprocmask(int, sigset_t *, sigset_t *);

struct pt_regs;
extern int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka, struct pt_regs *regs, void *cookie);

#endif /* __KERNEL__ */

#endif /* _LINUX_SIGNAL_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_SIGNAL_H
	2	#define _LINUX_SIGNAL_H
	3
1da177e4 LT	4	#include <asm/signal.h>
	5	#include <asm/siginfo.h>
	6
	7	#ifdef __KERNEL__
7ab2febd DW	8	#include <linux/list.h>
7ab2febd DW	9	#include <linux/spinlock.h>
1da177e4 LT	10
	11	/*
	12	* Real Time signals may be queued.
	13	*/
	14
	15	struct sigqueue {
	16	struct list_head list;
1da177e4 LT	17	int flags;
	18	siginfo_t info;
	19	struct user_struct *user;
	20	};
	21
	22	/* flags values. */
	23	#define SIGQUEUE_PREALLOC 1
	24
	25	struct sigpending {
	26	struct list_head list;
	27	sigset_t signal;
	28	};
	29
	30	/*
	31	* Define some primitives to manipulate sigset_t.
	32	*/
	33
	34	#ifndef __HAVE_ARCH_SIG_BITOPS
	35	#include <linux/bitops.h>
	36
	37	/* We don't use <linux/bitops.h> for these because there is no need to
	38	be atomic. */
	39	static inline void sigaddset(sigset_t *set, int _sig)
	40	{
	41	unsigned long sig = _sig - 1;
	42	if (_NSIG_WORDS == 1)
	43	set->sig[0] \|= 1UL << sig;
	44	else
	45	set->sig[sig / _NSIG_BPW] \|= 1UL << (sig % _NSIG_BPW);
	46	}
	47
	48	static inline void sigdelset(sigset_t *set, int _sig)
	49	{
	50	unsigned long sig = _sig - 1;
	51	if (_NSIG_WORDS == 1)
	52	set->sig[0] &= ~(1UL << sig);
	53	else
	54	set->sig[sig / _NSIG_BPW] &= ~(1UL << (sig % _NSIG_BPW));
	55	}
	56
	57	static inline int sigismember(sigset_t *set, int _sig)
	58	{
	59	unsigned long sig = _sig - 1;
	60	if (_NSIG_WORDS == 1)
	61	return 1 & (set->sig[0] >> sig);
	62	else
	63	return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
	64	}
	65
	66	static inline int sigfindinword(unsigned long word)
	67	{
	68	return ffz(~word);
	69	}
	70
	71	#endif /* __HAVE_ARCH_SIG_BITOPS */
	72
71fabd5e GA	73	static inline int sigisemptyset(sigset_t *set)
	74	{
	75	extern void _NSIG_WORDS_is_unsupported_size(void);
	76	switch (_NSIG_WORDS) {
	77	case 4:
	78	return (set->sig[3] \| set->sig[2] \|
	79	set->sig[1] \| set->sig[0]) == 0;
	80	case 2:
	81	return (set->sig[1] \| set->sig[0]) == 0;
	82	case 1:
	83	return set->sig[0] == 0;
	84	default:
	85	_NSIG_WORDS_is_unsupported_size();
	86	return 0;
	87	}
	88	}
	89
1da177e4 LT	90	#define sigmask(sig) (1UL << ((sig) - 1))
	91
	92	#ifndef __HAVE_ARCH_SIG_SETOPS
	93	#include <linux/string.h>
	94
	95	#define _SIG_SET_BINOP(name, op) \
	96	static inline void name(sigset_t r, const sigset_t a, const sigset_t *b) \
	97	{ \
	98	extern void _NSIG_WORDS_is_unsupported_size(void); \
	99	unsigned long a0, a1, a2, a3, b0, b1, b2, b3; \
	100	\
	101	switch (_NSIG_WORDS) { \
	102	case 4: \
	103	a3 = a->sig[3]; a2 = a->sig[2]; \
	104	b3 = b->sig[3]; b2 = b->sig[2]; \
	105	r->sig[3] = op(a3, b3); \
	106	r->sig[2] = op(a2, b2); \
	107	case 2: \
	108	a1 = a->sig[1]; b1 = b->sig[1]; \
	109	r->sig[1] = op(a1, b1); \
	110	case 1: \
	111	a0 = a->sig[0]; b0 = b->sig[0]; \
	112	r->sig[0] = op(a0, b0); \
	113	break; \
	114	default: \
	115	_NSIG_WORDS_is_unsupported_size(); \
	116	} \
	117	}
	118
	119	#define _sig_or(x,y) ((x) \| (y))
	120	_SIG_SET_BINOP(sigorsets, _sig_or)
	121
	122	#define _sig_and(x,y) ((x) & (y))
	123	_SIG_SET_BINOP(sigandsets, _sig_and)
	124
	125	#define _sig_nand(x,y) ((x) & ~(y))
	126	_SIG_SET_BINOP(signandsets, _sig_nand)
	127
	128	#undef _SIG_SET_BINOP
	129	#undef _sig_or
	130	#undef _sig_and
	131	#undef _sig_nand
	132
	133	#define _SIG_SET_OP(name, op) \
	134	static inline void name(sigset_t *set) \
	135	{ \
	136	extern void _NSIG_WORDS_is_unsupported_size(void); \
	137	\
	138	switch (_NSIG_WORDS) { \
	139	case 4: set->sig[3] = op(set->sig[3]); \
	140	set->sig[2] = op(set->sig[2]); \
	141	case 2: set->sig[1] = op(set->sig[1]); \
	142	case 1: set->sig[0] = op(set->sig[0]); \
	143	break; \
	144	default: \
	145	_NSIG_WORDS_is_unsupported_size(); \
	146	} \
	147	}
	148
	149	#define _sig_not(x) (~(x))
	150	_SIG_SET_OP(signotset, _sig_not)
	151
	152	#undef _SIG_SET_OP
	153	#undef _sig_not
154
155	static inline void sigemptyset(sigset_t *set)
156	{
157	switch (_NSIG_WORDS) {
158	default:
159	memset(set, 0, sizeof(sigset_t));
160	break;
161	case 2: set->sig[1] = 0;
162	case 1: set->sig[0] = 0;
163	break;
164	}
165	}
166
167	static inline void sigfillset(sigset_t *set)
168	{
169	switch (_NSIG_WORDS) {
170	default:
171	memset(set, -1, sizeof(sigset_t));
172	break;
173	case 2: set->sig[1] = -1;
174	case 1: set->sig[0] = -1;
175	break;
176	}
177	}
178
179	/* Some extensions for manipulating the low 32 signals in particular. */
180
181	static inline void sigaddsetmask(sigset_t *set, unsigned long mask)
182	{
183	set->sig[0] \|= mask;
184	}
185
186	static inline void sigdelsetmask(sigset_t *set, unsigned long mask)
187	{
188	set->sig[0] &= ~mask;
189	}
190
191	static inline int sigtestsetmask(sigset_t *set, unsigned long mask)
192	{
193	return (set->sig[0] & mask) != 0;
194	}
195
196	static inline void siginitset(sigset_t *set, unsigned long mask)
197	{
198	set->sig[0] = mask;
199	switch (_NSIG_WORDS) {
200	default:
201	memset(&set->sig[1], 0, sizeof(long)*(_NSIG_WORDS-1));
202	break;
203	case 2: set->sig[1] = 0;
204	case 1: ;
205	}
206	}
207
208	static inline void siginitsetinv(sigset_t *set, unsigned long mask)
209	{
210	set->sig[0] = ~mask;
211	switch (_NSIG_WORDS) {
212	default:
213	memset(&set->sig[1], -1, sizeof(long)*(_NSIG_WORDS-1));
214	break;
215	case 2: set->sig[1] = -1;
216	case 1: ;
217	}
218	}
219
220	#endif /* __HAVE_ARCH_SIG_SETOPS */
221
222	static inline void init_sigpending(struct sigpending *sig)
223	{
224	sigemptyset(&sig->signal);
225	INIT_LIST_HEAD(&sig->list);
226	}
227
6a14c5c9 ON	228	extern void flush_sigqueue(struct sigpending *queue);
6a14c5c9 ON	229
e5bdd883 JJ	230	/* Test if 'sig' is valid signal. Use this instead of testing _NSIG directly */
	231	static inline int valid_signal(unsigned long sig)
	232	{
	233	return sig <= _NSIG ? 1 : 0;
	234	}
	235
1da177e4 LT	236	extern int group_send_sig_info(int sig, struct siginfo info, struct task_struct p);
	237	extern int __group_send_sig_info(int, struct siginfo , struct task_struct );
	238	extern long do_sigpending(void __user *, unsigned long);
	239	extern int sigprocmask(int, sigset_t , sigset_t );
	240
1da177e4 LT	241	struct pt_regs;
1da177e4 LT	242	extern int get_signal_to_deliver(siginfo_t info, struct k_sigaction return_ka, struct pt_regs regs, void cookie);
1da177e4 LT	243
	244	#endif /* __KERNEL__ */
	245
	246	#endif /* _LINUX_SIGNAL_H */