diff options
| -rw-r--r-- | ChangeLog | 3 | ||||
| -rw-r--r-- | README | 4 | ||||
| -rw-r--r-- | include/features.h | 5 | ||||
| -rw-r--r-- | nptl/ChangeLog | 7 | ||||
| -rw-r--r-- | nptl/TODO | 15 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/i486/sem_post.S | 7 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/powerpc/sem_post.c | 14 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sem_post.c | 14 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sem_post.c | 13 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/sem_post.S | 9 | ||||
| -rw-r--r-- | version.h | 4 |
11 files changed, 46 insertions, 49 deletions
@@ -1,5 +1,8 @@ 2007-05-14 Ulrich Drepper <drepper@redhat.com> + * version.h (VERSION): Define to 6. + * include/features.h (__GLIBC_MINOR__): Likewise. + * malloc/malloc.c: Use all small bin slots on 64-bit archs. * malloc/malloc.c (largebin_index): Really have 32 buckets with 64 @@ -1,4 +1,4 @@ -This directory contains the version 2.5 release of the GNU C Library. +This directory contains the version 2.6 release of the GNU C Library. The GNU C Library is the standard system C library for all GNU systems, and is an important part of what makes up a GNU system. It provides the @@ -52,7 +52,7 @@ The GNU C Library supports these configurations for using Linux kernels: The code for other CPU configurations supported by volunteers outside of the core glibc maintenance effort is contained in the separate `ports' -add-on. You can find glibc-ports-2.5 distributed separately in the +add-on. You can find glibc-ports-2.6 distributed separately in the same place where you got the main glibc distribution files. Currently these configurations are known to work using the `ports' add-on: diff --git a/include/features.h b/include/features.h index ad9bbc7..0c729e8 100644 --- a/include/features.h +++ b/include/features.h @@ -1,5 +1,4 @@ -/* Copyright (C) 1991,1992,1993,1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006 - Free Software Foundation, Inc. +/* Copyright (C) 1991,1992,1993,1995-2006,2007 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -304,7 +303,7 @@ /* Major and minor version number of the GNU C library package. Use these macros to test for features in specific releases. */ #define __GLIBC__ 2 -#define __GLIBC_MINOR__ 5 +#define __GLIBC_MINOR__ 6 #define __GLIBC_PREREQ(maj, min) \ ((__GLIBC__ << 16) + __GLIBC_MINOR__ >= ((maj) << 16) + (min)) diff --git a/nptl/ChangeLog b/nptl/ChangeLog index 38ade7a..47d3696 100644 --- a/nptl/ChangeLog +++ b/nptl/ChangeLog @@ -1,12 +1,5 @@ 2007-05-14 Ulrich Drepper <drepper@redhat.com> - * sysdeps/unix/sysv/linux/sem_post.c: Only wake threads if old - value of semaphore was zero. - * sysdeps/unix/sysv/linux/i386/i486/sem_post.S: Likewise. - * sysdeps/unix/sysv/linux/powerpc/sem_post.c: Likewise. - * sysdeps/unix/sysv/linux/sparc/sparc32/sem_post.c: Likewise. - * sysdeps/unix/sysv/linux/x86_64/sem_post.S: Likewise. - * sysdeps/unix/sysv/linux/x86_64/sem_wait.S: Remove unnecessary extra cancellation test. * sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S: Likewise. @@ -14,3 +14,18 @@ syscall needed. - test with threaded process terminating and semadj (?) being applied only after all threads are gone + + + +- semaphore changes: + + - sem_post should only wake one thread and only when the state of + the semaphore changed from 0 to 1 + + this also requires that sem_wait and sem_timedwait don't drop the + post if they get canceled. + + - possibly add counter field. This requires reviving the + differences between old and new semaphose funtions. The old ones + stay as they are now. The new once can use an additional field + wich is the counter for the number of waiters diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_post.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_post.S index 2813c20..71e96d2 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_post.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/sem_post.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2005, 2007 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -44,12 +44,9 @@ __new_sem_post: LOCK xaddl %edx, (%ebx) - testl %edx, %edx - jne 2f - movl $SYS_futex, %eax movl $FUTEX_WAKE, %ecx - movl $1, %edx + addl $1, %edx ENTER_KERNEL testl %eax, %eax diff --git a/nptl/sysdeps/unix/sysv/linux/powerpc/sem_post.c b/nptl/sysdeps/unix/sysv/linux/powerpc/sem_post.c index 86dd0eb..91b9955 100644 --- a/nptl/sysdeps/unix/sysv/linux/powerpc/sem_post.c +++ b/nptl/sysdeps/unix/sysv/linux/powerpc/sem_post.c @@ -1,5 +1,5 @@ /* sem_post -- post to a POSIX semaphore. Powerpc version. - Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc. + Copyright (C) 2003, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003. @@ -32,14 +32,12 @@ __new_sem_post (sem_t *sem) int *futex = (int *) sem; __asm __volatile (__lll_rel_instr ::: "memory"); - if (atomic_increment_val (futex) == 1) + int nr = atomic_increment_val (futex); + int err = lll_futex_wake (futex, nr); + if (__builtin_expect (err, 0) < 0) { - int err = lll_futex_wake (futex, 1); - if (__builtin_expect (err, 0) < 0) - { - __set_errno (-err); - return -1; - } + __set_errno (-err); + return -1; } return 0; } diff --git a/nptl/sysdeps/unix/sysv/linux/sem_post.c b/nptl/sysdeps/unix/sysv/linux/sem_post.c index 641ce66..671b43f 100644 --- a/nptl/sysdeps/unix/sysv/linux/sem_post.c +++ b/nptl/sysdeps/unix/sysv/linux/sem_post.c @@ -1,5 +1,5 @@ /* sem_post -- post to a POSIX semaphore. Generic futex-using version. - Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc. + Copyright (C) 2003, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek <jakub@redhat.com>, 2003. @@ -31,14 +31,12 @@ __new_sem_post (sem_t *sem) { int *futex = (int *) sem; - if (atomic_increment_val (futex) == 1) + int nr = atomic_increment_val (futex); + int err = lll_futex_wake (futex, nr); + if (__builtin_expect (err, 0) < 0) { - int err = lll_futex_wake (futex, 1); - if (__builtin_expect (err, 0) < 0) - { - __set_errno (-err); - return -1; - } + __set_errno (-err); + return -1; } return 0; } diff --git a/nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sem_post.c b/nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sem_post.c index ba77aa9..be1cc60 100644 --- a/nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sem_post.c +++ b/nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sem_post.c @@ -1,5 +1,5 @@ /* sem_post -- post to a POSIX semaphore. SPARC version. - Copyright (C) 2003, 2004, 2006, 2007 Free Software Foundation, Inc. + Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek <jakub@redhat.com>, 2003. @@ -39,14 +39,11 @@ __new_sem_post (sem_t *sem) nr = ++*futex; __sparc32_atomic_do_unlock24 (futex + 1); } - if (nr == 1) + int err = lll_futex_wake (futex, nr); + if (__builtin_expect (err, 0) < 0) { - int err = lll_futex_wake (futex, 1); - if (__builtin_expect (err, 0) < 0) - { - __set_errno (-err); - return -1; - } + __set_errno (-err); + return -1; } return 0; } diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/sem_post.S b/nptl/sysdeps/unix/sysv/linux/x86_64/sem_post.S index cc3a9a9..7f608a5 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/sem_post.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/sem_post.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2005, 2007 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -41,18 +41,15 @@ sem_post: LOCK xaddl %edx, (%rdi) - testl %edx, %edx - jne 2f - movl $SYS_futex, %eax movl $FUTEX_WAKE, %esi - movl $1, %edx + incl %edx syscall testq %rax, %rax js 1f -2: xorl %eax, %eax + xorl %eax, %eax retq 1: @@ -1,4 +1,4 @@ /* This file just defines the current version number of libc. */ -#define RELEASE "development" -#define VERSION "2.5.90" +#define RELEASE "stable" +#define VERSION "2.6" |