diff options
Diffstat (limited to 'libc/sysdeps')
| -rw-r--r-- | libc/sysdeps/linux/arm/bits/sigset.h | 76 |
1 files changed, 66 insertions, 10 deletions
diff --git a/libc/sysdeps/linux/arm/bits/sigset.h b/libc/sysdeps/linux/arm/bits/sigset.h index 6a516cd29..7ccadda45 100644 --- a/libc/sysdeps/linux/arm/bits/sigset.h +++ b/libc/sysdeps/linux/arm/bits/sigset.h @@ -24,7 +24,11 @@ typedef int __sig_atomic_t; /* A `sigset_t' has a bit for each signal. */ -typedef unsigned long __sigset_t; +# define _SIGSET_NWORDS (1024 / (8 * sizeof (unsigned long int))) +typedef struct + { + unsigned long int __val[_SIGSET_NWORDS]; + } __sigset_t; #endif @@ -43,27 +47,79 @@ typedef unsigned long __sigset_t; # endif /* Return a mask that includes the bit for SIG only. */ -# define __sigmask(sig) (1L << ((sig) - 1)) +# define __sigmask(sig) \ + (((unsigned long int) 1) << (((sig) - 1) % (8 * sizeof (unsigned long int)))) + +/* Return the word index for SIG. */ +# define __sigword(sig) (((sig) - 1) / (8 * sizeof (unsigned long int))) # if defined __GNUC__ && __GNUC__ >= 2 -# define __sigemptyset(set) (*(set) = 0) -# define __sigfillset(set) (*(set) = ~0) +# define __sigemptyset(set) \ + (__extension__ ({ int __cnt = _SIGSET_NWORDS; \ + sigset_t *__set = (set); \ + while (--__cnt >= 0) __set->__val[__cnt] = 0; \ + 0; })) +# define __sigfillset(set) \ + (__extension__ ({ int __cnt = _SIGSET_NWORDS; \ + sigset_t *__set = (set); \ + while (--__cnt >= 0) __set->__val[__cnt] = ~0UL; \ + 0; })) # ifdef __USE_GNU /* The POSIX does not specify for handling the whole signal set in one command. This is often wanted and so we define three more functions here. */ -# define __sigisemptyset(set) (*(set) == 0) -# define __sigandset(dest, left, right) (*(dest) = *(left) & *(right)) -# define __sigorset(dest, left, right) (*(dest) = *(left) | *(right)) +# define __sigisemptyset(set) \ + (__extension__ ({ int __cnt = _SIGSET_NWORDS; \ + const sigset_t *__set = (set); \ + int __ret = __set->__val[--__cnt]; \ + while (!__ret && --__cnt >= 0) \ + __ret = __set->__val[__cnt]; \ + __ret == 0; })) +# define __sigandset(dest, left, right) \ + (__extension__ ({ int __cnt = _SIGSET_NWORDS; \ + sigset_t *__dest = (dest); \ + const sigset_t *__left = (left); \ + const sigset_t *__right = (right); \ + while (--__cnt >= 0) \ + __dest->__val[__cnt] = (__left->__val[__cnt] \ + & __right->__val[__cnt]); \ + 0; })) +# define __sigorset(dest, left, right) \ + (__extension__ ({ int __cnt = _SIGSET_NWORDS; \ + sigset_t *__dest = (dest); \ + const sigset_t *__left = (left); \ + const sigset_t *__right = (right); \ + while (--__cnt >= 0) \ + __dest->__val[__cnt] = (__left->__val[__cnt] \ + | __right->__val[__cnt]); \ + 0; })) # endif # endif /* These functions needn't check for a bogus signal number -- error checking is done in the non __ versions. */ -# define __sigismember(set, sig) (*(set) & (1L << ((sig)-1))) -# define __sigaddset(set, sig) (*(set) |= (1L << ((sig)-1))) -# define __sigdelset(set, sig) (*(set) &= ~(1L << ((sig)-1))) +extern int __sigismember (__const __sigset_t *, int); +extern int __sigaddset (__sigset_t *, int); +extern int __sigdelset (__sigset_t *, int); + +# ifdef __USE_EXTERN_INLINES +# define __SIGSETFN(NAME, BODY, CONST) \ + _EXTERN_INLINE int \ + NAME (CONST __sigset_t *__set, int __sig) \ + { \ + unsigned long int __mask = __sigmask (__sig); \ + unsigned long int __word = __sigword (__sig); \ + return BODY; \ + } + +__SIGSETFN (__sigismember, (__set->__val[__word] & __mask) ? 1 : 0, __const) +__SIGSETFN (__sigaddset, ((__set->__val[__word] |= __mask), 0), ) +__SIGSETFN (__sigdelset, ((__set->__val[__word] &= ~__mask), 0), ) + +# undef __SIGSETFN +# endif + #endif /* ! _SIGSET_H_fns. */ |