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* sysdeps/pthread/pthread_cond_timedwait.c
	(__pthread_cond_timedwait): Optimize.  Drop internal lock earlier.
	Reuse code.  Add __builtin_expects.

	* init.c (pthread_functions): Make array const.
This commit is contained in:
Ulrich Drepper 2004-02-13 08:32:43 +00:00
parent 3730d95c77
commit 219304ecbb
2 changed files with 15 additions and 12 deletions
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6
nptl/ChangeLog
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@ -1,5 +1,9 @@
2004-02-13 Ulrich Drepper <drepper@redhat.com>
* sysdeps/pthread/pthread_cond_timedwait.c
(__pthread_cond_timedwait): Optimize. Drop internal lock earlier.
Reuse code. Add __builtin_expects.
* sysdeps/unix/sysv/linux/i386/i486/pthread_cond_timedwait.S
(__pthread_cond_timedwait): Get internal lock in case timeout has
passed before the futex syscall.
@ -35,7 +39,7 @@
2004-01-14 Ulrich Drepper <drepper@redhat.com>
* init.c (pthread_funtions): Make array const.
* init.c (pthread_functions): Make array const.
2004-01-13 Ulrich Drepper <drepper@redhat.com>

21
nptl/sysdeps/pthread/pthread_cond_timedwait.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2003 Free Software Foundation, Inc.
/* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.
@ -98,6 +98,9 @@ __pthread_cond_timedwait (cond, mutex, abstime)
while (1)
{
/* Prepare to wait. Release the condvar futex. */
lll_mutex_unlock (cond->__data.__lock);
struct timespec rt;
{
#ifdef __NR_clock_gettime
@ -138,19 +141,14 @@ __pthread_cond_timedwait (cond, mutex, abstime)
--rt.tv_sec;
}
/* Did we already time out? */
if (rt.tv_sec < 0)
if (__builtin_expect (rt.tv_sec < 0, 0))
{
/* Yep. Adjust the sequence counter. */
++cond->__data.__wakeup_seq;
/* We are going to look at shared data again, so get the lock. */
lll_mutex_lock(cond->__data.__lock);
/* The error value. */
result = ETIMEDOUT;
break;
goto timeout;
}
/* Prepare to wait. Release the condvar futex. */
lll_mutex_unlock (cond->__data.__lock);
/* Enable asynchronous cancellation. Required by the standard. */
cbuffer.oldtype = __pthread_enable_asynccancel ();
@ -170,8 +168,9 @@ __pthread_cond_timedwait (cond, mutex, abstime)
break;
/* Not woken yet. Maybe the time expired? */
if (err == -ETIMEDOUT)
if (__builtin_expect (err == -ETIMEDOUT, 0))
{
timeout:
/* Yep. Adjust the counters. */
++cond->__data.__wakeup_seq;