From 35ae1599438a15568818bf09b493d7b49039d452 Mon Sep 17 00:00:00 2001 From: Denis Vlasenko Date: Sat, 29 Nov 2008 15:35:51 +0000 Subject: 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 --- libc/sysdeps/linux/common/bits/sigset.h | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) (limited to 'libc') 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) \ -- cgit v1.2.3