#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 */