1 /* Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 #include <lowlevellock.h>
22 #include <lowlevelrwlock.h>
23 #include <pthread-errnos.h>
24 #include <kernel-features.h>
29 .globl pthread_rwlock_timedwrlock
30 .type pthread_rwlock_timedwrlock,@function
32 pthread_rwlock_timedwrlock:
35 cfi_adjust_cfa_offset(4)
37 cfi_adjust_cfa_offset(4)
39 cfi_adjust_cfa_offset(4)
41 cfi_adjust_cfa_offset(4)
47 cfi_adjust_cfa_offset(8)
59 cmpxchgl %edx, MUTEX(%ebp)
63 2: movl WRITER(%ebp), %eax
66 cmpl $0, NR_READERS(%ebp)
69 /* Check the value of the timeout parameter. */
70 3: cmpl $1000000000, 4(%edi)
73 addl $1, WRITERS_QUEUED(%ebp)
76 movl WRITERS_WAKEUP(%ebp), %esi
86 /* Get current time. */
89 movl $__NR_gettimeofday, %eax
92 /* Compute relative timeout. */
95 mul %edx /* Milli seconds to nano seconds. */
101 addl $1000000000, %edx
104 js 16f /* Time is already up. */
107 movl %ecx, (%esp) /* Store relative timeout. */
111 #ifdef __ASSUME_PRIVATE_FUTEX
112 movzbl PSHARED(%ebp), %ecx
113 xorl $FUTEX_PRIVATE_FLAG|FUTEX_WAIT, %ecx
115 movzbl PSHARED(%ebp), %ecx
117 orl $FUTEX_WAIT, %ecx
119 xorl %gs:PRIVATE_FUTEX, %ecx
122 leal WRITERS_WAKEUP(%ebp), %ebx
123 movl $SYS_futex, %eax
128 /* Reget the lock. */
133 cmpxchgl %edx, (%ebp)
135 cmpxchgl %edx, MUTEX(%ebp)
139 13: subl $1, WRITERS_QUEUED(%ebp)
140 cmpl $-ETIMEDOUT, %esi
143 18: movl $ETIMEDOUT, %edx
149 movl %eax, WRITER(%ebp)
161 cfi_adjust_cfa_offset(-8)
163 cfi_adjust_cfa_offset(-4)
166 cfi_adjust_cfa_offset(-4)
169 cfi_adjust_cfa_offset(-4)
172 cfi_adjust_cfa_offset(-4)
174 popl %ecx; nacljmp %ecx
176 cfi_adjust_cfa_offset(24)
178 cfi_offset(%edi, -12)
179 cfi_offset(%ebx, -16)
180 cfi_offset(%ebp, -20)
185 leal MUTEX(%ebp), %edx
187 movzbl PSHARED(%ebp), %ecx
191 14: cmpl %gs:TID, %eax
193 20: movl $EDEADLK, %edx
200 leal MUTEX(%ebp), %eax
202 movzbl PSHARED(%ebp), %ecx
203 call __lll_unlock_wake
207 4: subl $1, WRITERS_QUEUED(%ebp)
215 leal MUTEX(%ebp), %eax
217 movzbl PSHARED(%ebp), %ecx
218 call __lll_unlock_wake
225 leal MUTEX(%ebp), %edx
227 movzbl PSHARED(%ebp), %ecx
231 16: movl $-ETIMEDOUT, %esi
234 19: movl $EINVAL, %edx
237 .size pthread_rwlock_timedwrlock,.-pthread_rwlock_timedwrlock