Viewing file:  signal.h (5 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
#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 */
|