diff options
Diffstat (limited to 'libc/sysdeps/linux/common/bits')
| -rw-r--r-- | libc/sysdeps/linux/common/bits/sigset.h | 127 |
1 files changed, 85 insertions, 42 deletions
diff --git a/libc/sysdeps/linux/common/bits/sigset.h b/libc/sysdeps/linux/common/bits/sigset.h index 14497671d..964b09178 100644 --- a/libc/sysdeps/linux/common/bits/sigset.h +++ b/libc/sysdeps/linux/common/bits/sigset.h @@ -30,10 +30,9 @@ typedef int __sig_atomic_t; */ # define _SIGSET_NWORDS (64 / (8 * sizeof (unsigned long int))) -typedef struct - { - unsigned long int __val[_SIGSET_NWORDS]; - } __sigset_t; +typedef struct { + unsigned long int __val[_SIGSET_NWORDS]; +} __sigset_t; #endif @@ -59,47 +58,91 @@ typedef struct /* Return the word index for SIG. */ # define __sigword(sig) ((unsigned)((sig) - 1) / (8 * sizeof (unsigned long int))) +/* gcc 4.3.1 is not clever enough to optimize for _SIGSET_NWORDS == 1 and 2, + * which are about the only values which can be there */ + # if defined __GNUC__ && __GNUC__ >= 2 # define __sigemptyset(set) \ - (__extension__ ({ int __cnt = _SIGSET_NWORDS; \ - sigset_t *__set = (set); \ - while (--__cnt >= 0) __set->__val[__cnt] = 0; \ - 0; })) +(__extension__ ({ \ + sigset_t *__set = (set); \ + if (_SIGSET_NWORDS <= 2) { \ + __set->__val[0] = 0; \ + if (_SIGSET_NWORDS == 2) \ + __set->__val[1] = 0; \ + } else { \ + int __cnt = _SIGSET_NWORDS; \ + 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; })) +(__extension__ ({ \ + sigset_t *__set = (set); \ + if (_SIGSET_NWORDS <= 2) { \ + __set->__val[0] = ~0UL; \ + if (_SIGSET_NWORDS == 2) \ + __set->__val[1] = ~0UL; \ + } else { \ + int __cnt = _SIGSET_NWORDS; \ + 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) \ - (__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; })) +(__extension__ ({ \ + long __ret; \ + const sigset_t *__set = (set); \ + if (_SIGSET_NWORDS == 1) { \ + __ret = __set->__val[0]; \ + } else if (_SIGSET_NWORDS == 2) { \ + __ret = __set->__val[0] | __set->__val[1]; \ + } else { \ + int __cnt = _SIGSET_NWORDS; \ + __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; })) +(__extension__ ({ \ + sigset_t *__dest = (dest); \ + const sigset_t *__left = (left); \ + const sigset_t *__right = (right); \ + if (_SIGSET_NWORDS <= 2) { \ + __dest->__val[0] = __left->__val[0] & __right->__val[0];\ + if (_SIGSET_NWORDS == 2) \ + __dest->__val[1] = __left->__val[1] & __right->__val[1];\ + } else { \ + int __cnt = _SIGSET_NWORDS; \ + 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; })) +(__extension__ ({ \ + sigset_t *__dest = (dest); \ + const sigset_t *__left = (left); \ + const sigset_t *__right = (right); \ + if (_SIGSET_NWORDS <= 2) { \ + __dest->__val[0] = __left->__val[0] | __right->__val[0];\ + if (_SIGSET_NWORDS == 2) \ + __dest->__val[1] = __left->__val[1] | __right->__val[1];\ + } else { \ + int __cnt = _SIGSET_NWORDS; \ + while (--__cnt >= 0) \ + __dest->__val[__cnt] = (__left->__val[__cnt] \ + | __right->__val[__cnt]); \ + } \ + 0; \ +})) # endif # endif @@ -114,14 +157,14 @@ extern int __sigdelset (__sigset_t *, int); libc_hidden_proto(__sigdelset) # 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; \ - } +# 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), ) |