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* sysdeps/unix/sysv/linux/internaltypes.h (struct pthread_barrier):

Browse Source 
Add private field.
	* sysdeps/unix/sysv/linux/lowlevelbarrier.sym: Add PRIVATE definition.
	* pthread_barrier_init.c: Set private flag if pshared and private
	futexes are supported.
	* sysdeps/unix/sysv/linux/i386/i486/pthread_barrier_wait.S: Use
	private field in futex command setup.
	* sysdeps/unix/sysv/linux/x86_64/pthread_barrier_wait.S: Likewise.
This commit is contained in:
Ulrich Drepper
2007-05-26 16:19:15 +00:00
parent 42e6c66593
commit d8ff3792a8
6 changed files with 51 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
nptl/ChangeLog
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@ -1,3 +1,14 @@
2007-05-26 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/internaltypes.h (struct pthread_barrier):
Add private field.
* sysdeps/unix/sysv/linux/lowlevelbarrier.sym: Add PRIVATE definition.
* pthread_barrier_init.c: Set private flag if pshared and private
futexes are supported.
* sysdeps/unix/sysv/linux/i386/i486/pthread_barrier_wait.S: Use
private field in futex command setup.
* sysdeps/unix/sysv/linux/x86_64/pthread_barrier_wait.S: Likewise.
2007-05-25 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/i386/i486/sem_post.S: Add private futex

28
nptl/pthread_barrier_init.c
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@ -1,4 +1,4 @@
/* Copyright (C) 2002 Free Software Foundation, Inc.
/* Copyright (C) 2002, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@ -20,6 +20,13 @@
#include <errno.h>
#include "pthreadP.h"
#include <lowlevellock.h>
#include <kernel-features.h>
static const struct pthread_barrierattr default_attr =
{
.pshared = PTHREAD_PROCESS_PRIVATE
};
int
@ -33,17 +40,15 @@ pthread_barrier_init (barrier, attr, count)
if (__builtin_expect (count == 0, 0))
return EINVAL;
if (attr != NULL)
{
struct pthread_barrierattr *iattr;
iattr = (struct pthread_barrierattr *) attr;
struct pthread_barrierattr *iattr
= (attr != NULL
? iattr = (struct pthread_barrierattr *) attr
: &default_attr);
if (iattr->pshared != PTHREAD_PROCESS_PRIVATE
&& __builtin_expect (iattr->pshared != PTHREAD_PROCESS_SHARED, 0))
/* Invalid attribute. */
return EINVAL;
}
ibarrier = (struct pthread_barrier *) barrier;
@ -53,5 +58,14 @@ pthread_barrier_init (barrier, attr, count)
ibarrier->init_count = count;
ibarrier->curr_event = 0;
#ifdef __ASSUME_PRIVATE_FUTEX
ibarrier->private = (iattr->pshared != PTHREAD_PROCESS_PRIVATE
? 0 : FUTEX_PRIVATE_FLAG);
#else
ibarrier->private = (iattr->pshared != PTHREAD_PROCESS_PRIVATE
? 0 : THREAD_GETMEM (THREAD_SELF,
header.private_futex));
#endif
return 0;
}

11
nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_barrier_wait.S
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@ -1,4 +1,4 @@
/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
/* Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@ -69,7 +69,13 @@ pthread_barrier_wait:
/* Wait for the remaining threads. The call will return immediately
if the CURR_EVENT memory has meanwhile been changed. */
7: xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */
7:
#if FUTEX_WAIT == 0
movl PRIVATE(%ebx), %ecx
#else
movl $FUTEX_WAIT, %ecx
orl PRIVATE(%ebx), %ecx
#endif
xorl %esi, %esi
8: movl $SYS_futex, %eax
ENTER_KERNEL
@ -120,6 +126,7 @@ pthread_barrier_wait:
so 0x7fffffff is the highest value. */
movl $0x7fffffff, %edx
movl $FUTEX_WAKE, %ecx
orl PRIVATE(%ebx), %ecx
movl $SYS_futex, %eax
ENTER_KERNEL

1
nptl/sysdeps/unix/sysv/linux/internaltypes.h
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@ -96,6 +96,7 @@ struct pthread_barrier
int lock;
unsigned int left;
unsigned int init_count;
int private;
};

1
nptl/sysdeps/unix/sysv/linux/lowlevelbarrier.sym
View File

@ -9,3 +9,4 @@ CURR_EVENT offsetof (struct pthread_barrier, curr_event)
MUTEX offsetof (struct pthread_barrier, lock)
LEFT offsetof (struct pthread_barrier, left)
INIT_COUNT offsetof (struct pthread_barrier, init_count)
PRIVATE offsetof (struct pthread_barrier, private)

6
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_barrier_wait.S
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
/* Copyright (C) 2002, 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@ -65,9 +65,10 @@ pthread_barrier_wait:
if the CURR_EVENT memory has meanwhile been changed. */
7:
#if FUTEX_WAIT == 0
xorl %esi, %esi
movl PRIVATE(%rdi), %esi
#else
movl $FUTEX_WAIT, %esi
orl PRIVATE(%rdi), %esi
#endif
xorq %r10, %r10
8: movl $SYS_futex, %eax
@ -116,6 +117,7 @@ pthread_barrier_wait:
so 0x7fffffff is the highest value. */
movl $0x7fffffff, %edx
movl $FUTEX_WAKE, %esi
orl PRIVATE(%rdi), %esi
movl $SYS_futex, %eax
syscall