diff options
author | Ulrich Drepper <drepper@redhat.com> | 2003-01-29 00:39:03 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2003-01-29 00:39:03 +0000 |
commit | 6cf26f4168aef852d7fa4106b59af1a7fc40c650 (patch) | |
tree | 5b749a1f696051bf18a600a15dc1a0150a931b0e /nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S | |
parent | 4a99d1604d9e5790cc8a96287ec34e4abff4960b (diff) |
Update.
* Makefile (libpthread-routines): Remove lowlevelrwlock. Add
pthread_rwlock_rdlock, pthread_rwlock_timedrdlock,
pthread_rwlock_wrlock, pthread_rwlock_timedwrlock, and
pthread_rwlock_unlock.
* sysdeps/unix/sysv/linux/i386/i486/lowlevelrwlock.S: Removed
* sysdeps/unix/sysv/linux/i386/i586/lowlevelrwlock.S: Removed
* sysdeps/unix/sysv/linux/i386/i686/lowlevelrwlock.S: Removed
* sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_rdlock.S: New file.
* sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedrdlock.S:
New file.
* sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S: New file.
* sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedwrlock.S:
New file.
* sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S: New file.
* sysdeps/unix/sysv/linux/i386/i586/pthread_rwlock_rdlock.S: New file.
* sysdeps/unix/sysv/linux/i386/i586/pthread_rwlock_timedrdlock.S:
New file.
* sysdeps/unix/sysv/linux/i386/i586/pthread_rwlock_wrlock.S: New file.
* sysdeps/unix/sysv/linux/i386/i586/pthread_rwlock_timedwrlock.S:
New file.
* sysdeps/unix/sysv/linux/i386/i586/pthread_rwlock_unlock.S: New file.
* sysdeps/unix/sysv/linux/i386/i686/pthread_rwlock_rdlock.S: New file.
* sysdeps/unix/sysv/linux/i386/i686/pthread_rwlock_timedrdlock.S:
New file.
* sysdeps/unix/sysv/linux/i386/i686/pthread_rwlock_wrlock.S: New file.
* sysdeps/unix/sysv/linux/i386/i686/pthread_rwlock_timedwrlock.S:
New file.
* sysdeps/unix/sysv/linux/i386/i686/pthread_rwlock_unlock.S: New file.
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S')
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S new file mode 100644 index 0000000000..ff3960960d --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S @@ -0,0 +1,148 @@ +/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> +#include <lowlevelrwlock.h> + + +#define SYS_futex 240 +#define FUTEX_WAIT 0 +#define FUTEX_WAKE 1 + +#define EAGAIN 11 +#define EDEADLK 35 + +#ifndef UP +# define LOCK lock +#else +# define LOCK +#endif + + + .text + + .globl __pthread_rwlock_wrlock + .type __pthread_rwlock_wrlock,@function + .align 16 +__pthread_rwlock_wrlock: + pushl %esi + pushl %ebx + + xorl %esi, %esi + xorl %edx, %edx + movl 12(%esp), %ebx + + /* Get the lock. */ + movl $1, %eax + LOCK +#if MUTEX == 0 + xaddl %eax, (%ebx) +#else + xaddl %eax, MUTEX(%ebx) +#endif + testl %eax, %eax + jne 1f + +2: movl WRITER(%ebx), %eax + testl %eax, %eax + jne 14f + cmp $0, NR_READERS(%ebx) + je 5f + +3: incl WRITERS_QUEUED(%ebx) + je 4f + + LOCK +#if MUTEX == 0 + decl (%ebx) +#else + decl MUTEX(%ebx) +#endif + jne 10f + +11: addl $WRITERS_WAKEUP-MUTEX, %ebx + movl %esi, %ecx /* movl $FUTEX_WAIT, %ecx */ + movl $SYS_futex, %eax + ENTER_KERNEL + + subl $WRITERS_WAKEUP-MUTEX, %ebx + + /* Reget the lock. */ + movl $1, %eax + LOCK +#if MUTEX == 0 + xaddl %eax, (%ebx) +#else + xaddl %eax, MUTEX(%ebx) +#endif + testl %eax, %eax + jne 12f + +13: decl WRITERS_QUEUED(%ebx) + movl $0, WRITERS_WAKEUP(%ebx) + jmp 2b + +5: xorl %ecx, %ecx + movl %gs:8, %eax + movl %eax, WRITER(%ebx) +9: LOCK +#if MUTEX == 0 + decl (%ebx) +#else + decl MUTEX(%ebx) +#endif + jne 6f +7: + + movl %ecx, %eax + popl %ebx + popl %esi + ret + +1: movl %ebx, %ecx + call __lll_mutex_lock_wait + jmp 2b + +14: cmpl %gs:8, %eax + jne 3b + movl $EDEADLK, %ecx + jmp 9b + +6: movl %ebx, %eax + call __lll_mutex_unlock_wake + jmp 7b + +4: decl WRITERS_QUEUED(%ebx) + movl $EAGAIN, %ecx + jmp 9b + +10: movl %ebx, %eax + call __lll_mutex_unlock_wake + jmp 11b + +12: movl %ebx, %ecx + call __lll_mutex_lock_wait + jmp 13b + .size __pthread_rwlock_wrlock,.-__pthread_rwlock_wrlock + + .globl pthread_rwlock_wrlock +pthread_rwlock_wrlock = __pthread_rwlock_wrlock + + .globl __pthread_rwlock_wrlock_internal +__pthread_rwlock_wrlock_internal = __pthread_rwlock_wrlock |