diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S')
| -rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S | 47 |
1 files changed, 24 insertions, 23 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S b/libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S index 39b54dc6b..b7bc8522d 100644 --- a/libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2005, 2007, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -18,19 +18,10 @@ 02111-1307 USA. */ #include <sysdep.h> +#include <lowlevellock.h> #include <lowlevelrwlock.h> #include <pthread-errnos.h> -#include <tcb-offsets.h> - - -#define FUTEX_WAIT 0 -#define FUTEX_WAKE 1 - -#ifndef UP -# define LOCK lock -#else -# define LOCK -#endif +#include <bits/kernel-features.h> .text @@ -39,6 +30,7 @@ .type __pthread_rwlock_wrlock,@function .align 16 __pthread_rwlock_wrlock: + cfi_startproc xorq %r10, %r10 /* Get the lock. */ @@ -71,12 +63,20 @@ __pthread_rwlock_wrlock: #endif jne 10f -11: addq $WRITERS_WAKEUP, %rdi -#if FUTEX_WAIT == 0 - xorl %esi, %esi +11: +#ifdef __ASSUME_PRIVATE_FUTEX + movl $FUTEX_PRIVATE_FLAG|FUTEX_WAIT, %esi + xorl PSHARED(%rdi), %esi #else +# if FUTEX_WAIT == 0 + movl PSHARED(%rdi), %esi +# else movl $FUTEX_WAIT, %esi + orl PSHARED(%rdi), %esi +# endif + xorl %fs:PRIVATE_FUTEX, %esi #endif + addq $WRITERS_WAKEUP, %rdi movl $SYS_futex, %eax syscall @@ -111,11 +111,11 @@ __pthread_rwlock_wrlock: movq %rdx, %rax retq -1: +1: movl PSHARED(%rdi), %esi #if MUTEX != 0 addq $MUTEX, %rdi #endif - callq __lll_mutex_lock_wait + callq __lll_lock_wait #if MUTEX != 0 subq $MUTEX, %rdi #endif @@ -126,36 +126,37 @@ __pthread_rwlock_wrlock: movl $EDEADLK, %edx jmp 9b -6: +6: movl PSHARED(%rdi), %esi #if MUTEX != 0 addq $MUTEX, %rdi #endif - callq __lll_mutex_unlock_wake + callq __lll_unlock_wake jmp 7b 4: decl WRITERS_QUEUED(%rdi) movl $EAGAIN, %edx jmp 9b -10: +10: movl PSHARED(%rdi), %esi #if MUTEX != 0 addq $MUTEX, %rdi #endif - callq __lll_mutex_unlock_wake + callq __lll_unlock_wake #if MUTEX != 0 subq $MUTEX, %rdi #endif jmp 11b -12: +12: movl PSHARED(%rdi), %esi #if MUTEX != 0 addq $MUTEX, %rdi #endif - callq __lll_mutex_lock_wait + callq __lll_lock_wait #if MUTEX != 0 subq $MUTEX, %rdi #endif jmp 13b + cfi_endproc .size __pthread_rwlock_wrlock,.-__pthread_rwlock_wrlock .globl pthread_rwlock_wrlock |