diff options
| author | Denis Vlasenko <vda.linux@googlemail.com> | 2008-11-29 15:35:51 +0000 |
|---|---|---|
| committer | Denis Vlasenko <vda.linux@googlemail.com> | 2008-11-29 15:35:51 +0000 |
| commit | 35ae1599438a15568818bf09b493d7b49039d452 (patch) | |
| tree | 04cc734828b1dd978fbf6d6fd509168a5dd2bb58 /libc | |
| parent | d4cb8007c785edaaba9f707bc83d6a33f562a059 (diff) | |
reduce sigset_t size for 128 bytes to 64 bits:
text data bss dec hex filename
- 38457 18352 8636 65445 ffa5 lib/libpthread-0.9.30-svn.so
+ 38015 18096 8636 64747 fceb lib/libpthread-0.9.30-svn.so
- 8205 280 12 8497 2131 lib/libthread_db-0.9.30-svn.so
+ 8193 280 12 8485 2125 lib/libthread_db-0.9.30-svn.so
- 275208 1823 19132 296163 484e3 lib/libuClibc-0.9.30-svn.so
+ 274787 1823 19012 295622 482c6 lib/libuClibc-0.9.30-svn.so
Diffstat (limited to 'libc')
| -rw-r--r-- | libc/sysdeps/linux/common/bits/sigset.h | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/libc/sysdeps/linux/common/bits/sigset.h b/libc/sysdeps/linux/common/bits/sigset.h index 9a16e5cb9..14497671d 100644 --- a/libc/sysdeps/linux/common/bits/sigset.h +++ b/libc/sysdeps/linux/common/bits/sigset.h @@ -22,9 +22,14 @@ typedef int __sig_atomic_t; -/* A `sigset_t' has a bit for each signal. */ - -# define _SIGSET_NWORDS (1024 / (8 * sizeof (unsigned long int))) +/* A 'sigset_t' has a bit for each signal. + * Signal 0 does not exist, so we have signals 1..64. + * glibc has space for 1024 signals (!), but all arches supported + * by Linux have 64 signals only. + * See, for example, _NSIG (defined to 65) in signum.h + */ + +# define _SIGSET_NWORDS (64 / (8 * sizeof (unsigned long int))) typedef struct { unsigned long int __val[_SIGSET_NWORDS]; @@ -47,11 +52,12 @@ typedef struct # endif /* Return a mask that includes the bit for SIG only. */ +/* Unsigned cast ensures shift/mask insns are used. */ # define __sigmask(sig) \ - (((unsigned long int) 1) << (((sig) - 1) % (8 * sizeof (unsigned long int)))) + (((unsigned long int) 1) << ((unsigned)((sig) - 1) % (8 * sizeof (unsigned long int)))) /* Return the word index for SIG. */ -# define __sigword(sig) (((sig) - 1) / (8 * sizeof (unsigned long int))) +# define __sigword(sig) ((unsigned)((sig) - 1) / (8 * sizeof (unsigned long int))) # if defined __GNUC__ && __GNUC__ >= 2 # define __sigemptyset(set) \ |