Chip 2007 January, February, March & April/Chip-Cover-CD-2007-02.iso/Pakiet bezpieczenstwa/mini Pentoo LiveCD 2006.1/mpentoo-2006.1.iso/livecd.squashfs/usr/include/linux/signal.h

C/C++ Source or Header | 2005-10-13 | 4.8 KB | 226 lines

#ifndef _LINUX_SIGNAL_H
#define _LINUX_SIGNAL_H

#include <linux/list.h>
#include <linux/spinlock.h>
#include <asm/signal.h>
#include <asm/siginfo.h>

#ifdef __KERNEL__

#define MAX_SIGPENDING    1024

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

struct sigqueue {
    struct list_head list;
    spinlock_t *lock;
    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 */

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

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

#endif /* __KERNEL__ */

#endif /* _LINUX_SIGNAL_H */