diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S | 126 |
1 files changed, 0 insertions, 126 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S deleted file mode 100644 index d779f7b759..0000000000 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S +++ /dev/null @@ -1,126 +0,0 @@ -/* Copyright (C) 2002-2014 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, see - <http://www.gnu.org/licenses/>. */ - -#include <sysdep.h> -#include <lowlevellock.h> -#include <lowlevelrwlock.h> -#include <kernel-features.h> - - - .text - - .globl __pthread_rwlock_unlock - .type __pthread_rwlock_unlock,@function - .align 16 -__pthread_rwlock_unlock: - cfi_startproc - /* Get the lock. */ - movl $1, %esi - xorl %eax, %eax - LOCK -#if MUTEX == 0 - cmpxchgl %esi, (%rdi) -#else - cmpxchgl %esi, MUTEX(%rdi) -#endif - jnz 1f - -2: cmpl $0, WRITER(%rdi) - jne 5f - decl NR_READERS(%rdi) - jnz 6f - -5: movl $0, WRITER(%rdi) - - movl $1, %edx - leaq WRITERS_WAKEUP(%rdi), %r10 - cmpl $0, WRITERS_QUEUED(%rdi) - jne 0f - - /* If also no readers waiting nothing to do. */ - cmpl $0, READERS_QUEUED(%rdi) - je 6f - - movl $0x7fffffff, %edx - leaq READERS_WAKEUP(%rdi), %r10 - -0: incl (%r10) - LOCK -#if MUTEX == 0 - decl (%rdi) -#else - decl MUTEX(%rdi) -#endif - jne 7f - -8: -#ifdef __ASSUME_PRIVATE_FUTEX - movl $FUTEX_PRIVATE_FLAG|FUTEX_WAKE, %esi - xorl PSHARED(%rdi), %esi -#else - movl $FUTEX_WAKE, %esi - orl PSHARED(%rdi), %esi - xorl %fs:PRIVATE_FUTEX, %esi -#endif - movl $SYS_futex, %eax - movq %r10, %rdi - syscall - - xorl %eax, %eax - retq - - .align 16 -6: LOCK -#if MUTEX == 0 - decl (%rdi) -#else - decl MUTEX(%rdi) -#endif - jne 3f - -4: xorl %eax, %eax - retq - -1: movl PSHARED(%rdi), %esi -#if MUTEX != 0 - addq $MUTEX, %rdi -#endif - callq __lll_lock_wait -#if MUTEX != 0 - subq $MUTEX, %rdi -#endif - jmp 2b - -3: movl PSHARED(%rdi), %esi -#if MUTEX != 0 - addq $MUTEX, %rdi -#endif - callq __lll_unlock_wake - jmp 4b - -7: movl PSHARED(%rdi), %esi -#if MUTEX != 0 - addq $MUTEX, %rdi -#endif - callq __lll_unlock_wake - jmp 8b - cfi_endproc - .size __pthread_rwlock_unlock,.-__pthread_rwlock_unlock - -strong_alias (__pthread_rwlock_unlock, pthread_rwlock_unlock) -hidden_def (__pthread_rwlock_unlock) |