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This commit is contained in:
Ulrich Drepper 2009-08-22 17:58:04 -07:00
parent 15efafdf07
commit cd16986ee3
6 changed files with 11 additions and 547 deletions
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13
nptl/pthread_rwlock_init.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2002, 2007, 2009 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.
@ -37,7 +37,13 @@ __pthread_rwlock_init (rwlock, attr)
iattr = ((const struct pthread_rwlockattr *) attr) ?: &default_attr;
memset (rwlock, '\0', sizeof (*rwlock));
rwlock->__data.__lock = 0;
rwlock->__data.__nr_readers = 0;
rwlock->__data.__readers_wakeup = 0;
rwlock->__data.__writer_wakeup = 0;
rwlock->__data.__nr_readers_queued = 0;
rwlock->__data.__nr_writers_queued = 0;
rwlock->__data.__writer = 0;
rwlock->__data.__flags
= iattr->lockkind == PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP;
@ -68,6 +74,9 @@ __pthread_rwlock_init (rwlock, attr)
header.private_futex));
#endif
rwlock->__data.__pad1 = 0;
rwlock->__data.__pad2 = 0;
return 0;
}
strong_alias (__pthread_rwlock_init, pthread_rwlock_init)

122
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S
View File

@ -31,127 +31,6 @@
.align 16
__pthread_rwlock_rdlock:
cfi_startproc
movq $NRW_RC, %rax
LOCK
xaddq %rax, NRW_WORD(%rdi)
js .Lundo
.Lagain1:
movq $(NRW_WL|NRW_WP), %rcx
movq $(NRW_WL|NRW_WW_MASK), %rdx
testq %rax, %rcx
setnz %cl
testq %rax, %rdx
setnz %dl
orb %cl, %dl
jnz .Lwait
xorl %eax, %eax
ret
.Lwait: movq $NRW_WL, %rcx
testq %rcx, %rax
jz 4f
movl %fs:TID, %ecx
cmpl %ecx, WRITER(%rdi)
je .Ldeadlk
4: xorq %r8, %r8
movq $NRW_RC, %rdx
addq %rdx, %rax
movq $(NRW_WL|NRW_AR), %rcx
movq $(NRW_WP|NRW_WW_MASK), %rdx
testq %rax, %rcx
setz %cl
testq %rax, %rdx
setnz %dl
testb %dl, %cl
jz 1f
movq $NRW_RW-NRW_RC, %rdx
addq %rax, %rdx
LOCK
cmpxchgq %rdx, NRW_WORD(%rdi)
jnz .Lagain1
movq $NRW_RC_MASK, %rax
testq %rdx, %rax
movl $1, %r8d
jz .Lwake_waiter
1: xorq %r10, %r10
movl $NRW_R_WAKEUP, %r9d
movl $(FUTEX_WAIT_BITSET|FUTEX_PRIVATE_FLAG), %esi
xorl PSHARED(%rdi), %esi
leaq NRW_WORD+4(%rdi), %rdi
2: shldq $32, %rax, %rdx
movl $__NR_futex, %eax
syscall
movq -4(%rdi), %rax
5: movq $(NRW_WL|NRW_WP), %rcx
movq $(NRW_WL|NRW_WW_MASK), %rdx
testq %rax, %rcx
setnz %cl
testq %rax, %rdx
setnz %dl
orb %cl, %dl
jnz 2b
testl %r8d, %r8d
jz 3f
movq $NRW_RC-NRW_RW, %rcx
addq %rcx, %rdx
LOCK
cmpxchgq %rdx, -4(%rdi)
jnz 5b
3: xorl %eax, %eax
ret
.Lwake_waiter:
movq %rdx, %r10
movl $__NR_futex, %eax
movl $(FUTEX_WAKE_BITSET|FUTEX_PRIVATE_FLAG), %esi
xorl PSHARED(%rdi), %esi
leaq NRW_WORD(%rdi), %rdi
movl $1, %edx
movl $NRW_W_WAKEUP, %r9d
syscall
leaq -NRW_WORD(%rdi), %rdi
movq %r10, %rdx
jmp 1b
.Lundo: movq $-NRW_RC, %rcx
movq %rax, %rdx
subq %rcx, %rax
LOCK
cmpxchgq %rdx, NRW_WORD(%rdi)
jz .Lret
movq $NRW_RC_OVFL, %r8
.Lagain2:
testq %r8, %rax
jz .Lagain1
leaq (%rax,%rcx), %rdx
LOCK
cmpxchgq %rdx, NRW_WORD(%rdi)
jnz .Lagain2
.Lret: movl $EAGAIN, %eax
ret
.Ldeadlk:
movq $NRW_RC, %rdx
LOCK
subq %rdx, NRW_WORD(%rdi)
movl $EDEADLK, %eax
ret
#if 0
xorq %r10, %r10
/* Get the lock. */
@ -289,7 +168,6 @@ __pthread_rwlock_rdlock:
subq $MUTEX, %rdi
#endif
jmp 13b
#endif
cfi_endproc
.size __pthread_rwlock_rdlock,.-__pthread_rwlock_rdlock

138
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S
View File

@ -34,143 +34,6 @@
.align 16
pthread_rwlock_timedrdlock:
cfi_startproc
movq %rsi, %r10
movq $NRW_RC, %rax
LOCK
xaddq %rax, NRW_WORD(%rdi)
js .Lundo
.Lagain1:
movq $(NRW_WL|NRW_WP), %rcx
movq $(NRW_WL|NRW_WW_MASK), %rdx
testq %rax, %rcx
setnz %cl
testq %rax, %rdx
setnz %dl
orb %cl, %dl
jnz .Lwait
xorl %eax, %eax
ret
.Lwait: movq $NRW_WL, %rcx
testq %rcx, %rax
jz 4f
movl %fs:TID, %ecx
cmpl %ecx, WRITER(%rdi)
je .Ldeadlk
4: xorq %r8, %r8
movq $NRW_RC, %rdx
addq %rdx, %rax
movq $(NRW_WL|NRW_AR), %rcx
movq $(NRW_WP|NRW_WW_MASK), %rdx
testq %rax, %rcx
setz %cl
testq %rax, %rdx
setnz %dl
testb %dl, %cl
jz 1f
movq $NRW_RW-NRW_RC, %rdx
addq %rax, %rdx
LOCK
cmpxchgq %rdx, NRW_WORD(%rdi)
jnz .Lagain1
movq $NRW_RC_MASK, %rax
testq %rdx, %rax
movq $NRW_RW-NRW_RC, %r8
jz .Lwake_waiter
1: movl $NRW_R_WAKEUP, %r9d
leaq NRW_WORD+4(%rdi), %rdi
2: movl $(FUTEX_WAIT_BITSET|FUTEX_PRIVATE_FLAG|FUTEX_CLOCK_REALTIME), %esi
xorl PSHARED-(NRW_WORD+4)(%rdi), %esi
shldq $32, %rax, %rdx
movl $__NR_futex, %eax
syscall
movl %eax, %esi
movq -4(%rdi), %rax
6: movq $(NRW_WL|NRW_WP), %rcx
movq $(NRW_WL|NRW_WW_MASK), %rdx
testq %rax, %rcx
setnz %cl
testq %rax, %rdx
setnz %dl
orb %cl, %dl
jz 5f
cmpl $-EWOULDBLOCK, %esi
je 2b
movq $-NRW_RC, %rdx
subq %r8, %rdx
addq %rax, %rdx
LOCK
cmpxchgq %rdx, -4(%rdi)
jnz 6b
negl %esi
movl %esi, %eax
ret
5: testl %r8d, %r8d
jz 3f
movq $NRW_RC-NRW_RW, %rcx
addq %rcx, %rdx
LOCK
cmpxchgq %rdx, -4(%rdi)
jnz 6b
3: xorl %eax, %eax
ret
.Lwake_waiter:
movq %rdx, %r10
movl $__NR_futex, %eax
movl $(FUTEX_WAKE_BITSET|FUTEX_PRIVATE_FLAG), %esi
xorl PSHARED(%rdi), %esi
leaq NRW_WORD(%rdi), %rdi
movl $1, %edx
movl $NRW_W_WAKEUP, %r9d
syscall
leaq -NRW_WORD(%rdi), %rdi
movq %r10, %rdx
jmp 1b
.Lundo: movq $-NRW_RC, %rcx
movq %rax, %rdx
subq %rcx, %rax
LOCK
cmpxchgq %rdx, NRW_WORD(%rdi)
jz .Lret
movq $NRW_RC_OVFL, %r8
.Lagain2:
testq %r8, %rax
jz .Lagain1
leaq (%rax,%rcx), %rdx
LOCK
cmpxchgq %rdx, NRW_WORD(%rdi)
jnz .Lagain2
.Lret: movl $EAGAIN, %eax
ret
.Ldeadlk:
movq $NRW_RC, %rdx
LOCK
subq %rdx, NRW_WORD(%rdi)
movl $EDEADLK, %eax
ret
#if 0
pushq %r12
cfi_adjust_cfa_offset(8)
cfi_rel_offset(%r12, 0)
@ -408,6 +271,5 @@ pthread_rwlock_timedrdlock:
19: movl $EINVAL, %edx
jmp 9b
#endif
cfi_endproc
.size pthread_rwlock_timedrdlock,.-pthread_rwlock_timedrdlock

104
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S
View File

@ -34,109 +34,6 @@
.align 16
pthread_rwlock_timedwrlock:
cfi_startproc
movq %rsi, %r10
movq NRW_WORD(%rdi), %rax
.Lagain:
movq $(NRW_WW_MASK|NRW_WL|NRW_RC_MASK), %rdx
testq %rdx, %rax
jnz .Lwait
// XXX Probably make AR a don't-care for !WP. Unconditionally set it
movq $(NRW_AR|NRW_WL), %rdx
movq $NRW_WL, %rcx
testq $NRW_WP, %rax
cmovz %rcx, %rdx
orq %rax, %rdx
LOCK
cmpxchgq %rdx, NRW_WORD(%rdi)
jnz .Lagain
movl %fs:TID, %eax
movl %eax, WRITER(%rdi)
xorl %eax, %eax
ret
.Lwait: movq $NRW_WL, %rcx
testq %rcx, %rax
jz 1f
movl %fs:TID, %eax
cmpl %eax, WRITER(%rdi)
je .Ldeadlk
1: leaq NRW_WORD+4(%rdi), %rdi
movq $NRW_WW, %rdx
movq $NRW_WW_MASK, %rcx
addq %rax, %rdx
testq %rcx, %rdx
jz .Lovfl
LOCK
cmpxchgq %rdx, -4(%rdi)
jnz .Lagain
movl $NRW_W_WAKEUP, %r9d
.Lwait2:
movl $(FUTEX_WAIT_BITSET|FUTEX_PRIVATE_FLAG|FUTEX_CLOCK_REALTIME), %esi
movl $__NR_futex, %eax
xorl PSHARED-(NRW_WORD+4)(%rdi), %esi
syscall
movl %eax, %esi
movq -4(%rdi), %rax
.Lagain2:
movq $(NRW_WL|NRW_RC_MASK), %rdx
movq $(NRW_WL|NRW_AR), %rcx
testq %rdx, %rax
movq $NRW_AR, %rsi
setz %cl
andq %rax, %rcx
cmpq %rsi, %rcx
sete %cl
orb %dl, %cl
jnz 2f
cmpl $-EWOULDBLOCK, %esi
jne .Lwait2
movq $-NRW_WW, %rdx
addq %rax, %rdx
LOCK
cmpxchgq %rdx, -4(%rdi)
jnz .Lagain2
negl %esi
movl %esi, %eax
ret
2: movq $-NRW_WW, %rdx
addq %rax, %rdx
xorl %ecx, %ecx
testq $NRW_WP, %rax
cmovz %rcx, %rsi
orq %rsi, %rdx
LOCK
cmpxchgq %rdx, -4(%rdi)
jnz .Lagain2
movl %fs:TID, %eax
movl %eax, WRITER(%rdi)
xorl %eax, %eax
ret
.Lovfl: movl $EAGAIN, %eax
ret
.Ldeadlk:
movl $EDEADLK, %eax
ret
#if 0
pushq %r12
cfi_adjust_cfa_offset(8)
cfi_rel_offset(%r12, 0)
@ -366,6 +263,5 @@ pthread_rwlock_timedwrlock:
19: movl $EINVAL, %edx
jmp 9b
#endif
cfi_endproc
.size pthread_rwlock_timedwrlock,.-pthread_rwlock_timedwrlock

92
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S
View File

@ -30,97 +30,6 @@
.align 16
__pthread_rwlock_unlock:
cfi_startproc
movq NRW_WORD(%rdi), %rax
movq $NRW_WL, %rdx
testq %rdx, %rax
jnz .Lunlock_writer
.Lagain:
movq $-NRW_RC, %rdx
addq %rax, %rdx
movq $NRW_RC_MASK, %rcx
testq %rcx, %rdx
jz .Llast_reader
1: LOCK
cmpxchgq %rdx, NRW_WORD(%rdi)
jnz .Lagain
xorl %eax, %eax
ret
.Llast_reader:
movq $NRW_WW_MASK, %rcx
testq %rax, %rcx
jz 1b
movq $NRW_AR, %rcx
xorl %esi, %esi
testq $NRW_WP, %rax
cmovz %esi, %ecx
orq %rcx, %rdx
LOCK
cmpxchgq %rdx, NRW_WORD(%rdi)
jnz .Lagain
.Lwake_writer:
movl $1, %edx
movl $NRW_W_WAKEUP, %r9d
.Lwake: movl $(FUTEX_WAKE_BITSET|FUTEX_PRIVATE_FLAG), %esi
xorl PSHARED(%rdi), %esi
leaq NRW_WORD(%rdi), %rdi
movl $__NR_futex, %eax
syscall
.Lout: xorl %eax, %eax
ret
.Lunlock_writer:
movq %rax, %rdx
movq $NRW_WW_MASK, %rcx
testq %rcx, %rax
jz .Lno_writers
movq $NRW_RC_MASK, %rcx
testq %rcx, %rax
jz 2f
testq $NRW_WP, %rax
jz .Lwake_readers
2: movq $~NRW_WL, %rcx
andq %rcx, %rdx
LOCK
cmpxchgq %rdx, NRW_WORD(%rdi)
jnz .Lunlock_writer
jmp .Lwake_writer
.Lno_writers:
movq $~(NRW_WL|NRW_AR), %rcx
andq %rcx, %rdx
LOCK
cmpxchgq %rdx, NRW_WORD(%rdi)
jnz .Lunlock_writer
movq $(NRW_RW_MASK|NRW_RC_MASK), %rcx
testq %rcx, %rax
jz .Lout
movl $0x7fffffff, %edx
movl $NRW_R_WAKEUP, %r9d
jmp .Lwake
.Lwake_readers:
movq $~NRW_WL, %rcx
andq %rcx, %rdx
LOCK
cmpxchgq %rdx, NRW_WORD(%rdi)
jnz .Lunlock_writer
movl $0x7fffffff, %edx
movl $NRW_R_WAKEUP, %r9d
jmp .Lwake
#if 0
/* Get the lock. */
movl $1, %esi
xorl %eax, %eax
@ -211,7 +120,6 @@ __pthread_rwlock_unlock:
#endif
callq __lll_unlock_wake
jmp 8b
#endif
cfi_endproc
.size __pthread_rwlock_unlock,.-__pthread_rwlock_unlock

89
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S
View File

@ -31,94 +31,6 @@
.align 16
__pthread_rwlock_wrlock:
cfi_startproc
movq NRW_WORD(%rdi), %rax
.Lagain:
movq $(NRW_WW_MASK|NRW_WL|NRW_RC_MASK), %rdx
testq %rdx, %rax
jnz .Lwait
// XXX Probably make AR a don't-care for !WP. Unconditionally set it
movq $(NRW_AR|NRW_WL), %rdx
movq $NRW_WL, %rcx
testq $NRW_WP, %rax
cmovz %rcx, %rdx
orq %rax, %rdx
LOCK
cmpxchgq %rdx, NRW_WORD(%rdi)
jnz .Lagain
movl %fs:TID, %eax
movl %eax, WRITER(%rdi)
xorl %eax, %eax
ret
.Lwait: movq $NRW_WL, %rcx
testq %rcx, %rax
jz 1f
movl %fs:TID, %eax
cmpl %eax, WRITER(%rdi)
je .Ldeadlk
1: leaq NRW_WORD+4(%rdi), %rdi
movq $NRW_WW, %rdx
movq $NRW_WW_MASK, %rcx
addq %rax, %rdx
testq %rcx, %rdx
jz .Lovfl
LOCK
cmpxchgq %rdx, -4(%rdi)
jnz .Lagain
xorq %r10, %r10
movl $NRW_W_WAKEUP, %r9d
.Lwait2:
movl $(FUTEX_WAIT_BITSET|FUTEX_PRIVATE_FLAG), %esi
movl $__NR_futex, %eax
xorl PSHARED-(NRW_WORD+4)(%rdi), %esi
syscall
movq -4(%rdi), %rax
.Lagain2:
movq $(NRW_WL|NRW_RC_MASK), %rdx
movq $(NRW_WL|NRW_AR), %rcx
testq %rdx, %rax
movq $NRW_AR, %rsi
setz %cl
andq %rax, %rcx
cmpq %rsi, %rcx
sete %cl
orb %dl, %cl
jz .Lwait2
movq $-NRW_WW, %rdx
addq %rax, %rdx
xorl %ecx, %ecx
testq $NRW_WP, %rax
cmovz %rcx, %rsi
orq %rsi, %rdx
LOCK
cmpxchgq %rdx, -4(%rdi)
jnz .Lagain2
movl %fs:TID, %eax
movl %eax, WRITER(%rdi)
xorl %eax, %eax
ret
.Lovfl: movl $EAGAIN, %eax
ret
.Ldeadlk:
movl $EDEADLK, %eax
ret
#if 0
xorq %r10, %r10
/* Get the lock. */
@ -244,7 +156,6 @@ __pthread_rwlock_wrlock:
subq $MUTEX, %rdi
#endif
jmp 13b
#endif
cfi_endproc
.size __pthread_rwlock_wrlock,.-__pthread_rwlock_wrlock