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_timedrdlock
30 .type pthread_rwlock_timedrdlock,@function
32 pthread_rwlock_timedrdlock:
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, WRITERS_QUEUED(%ebp)
71 /* Check the value of the timeout parameter. */
72 3: cmpl $1000000000, 4(%edi)
75 addl $1, READERS_QUEUED(%ebp)
78 movl READERS_WAKEUP(%ebp), %esi
88 /* Get current time. */
91 movl $__NR_gettimeofday, %eax
94 /* Compute relative timeout. */
97 mul %edx /* Milli seconds to nano seconds. */
103 addl $1000000000, %edx
106 js 16f /* Time is already up. */
109 movl %ecx, (%esp) /* Store relative timeout. */
113 #ifdef __ASSUME_PRIVATE_FUTEX
114 movzbl PSHARED(%ebp), %ecx
115 xorl $FUTEX_PRIVATE_FLAG|FUTEX_WAIT, %ecx
117 movzbl PSHARED(%ebp), %ecx
119 orl $FUTEX_WAIT, %ecx
121 xorl %gs:PRIVATE_FUTEX, %ecx
124 leal READERS_WAKEUP(%ebp), %ebx
125 movl $SYS_futex, %eax
130 /* Reget the lock. */
135 cmpxchgl %edx, (%ebp)
137 cmpxchgl %edx, MUTEX(%ebp)
141 13: subl $1, READERS_QUEUED(%ebp)
142 cmpl $-ETIMEDOUT, %esi
145 18: movl $ETIMEDOUT, %edx
150 addl $1, NR_READERS(%ebp)
163 cfi_adjust_cfa_offset(-8)
165 cfi_adjust_cfa_offset(-4)
168 cfi_adjust_cfa_offset(-4)
171 cfi_adjust_cfa_offset(-4)
174 cfi_adjust_cfa_offset(-4)
178 cfi_adjust_cfa_offset(24)
180 cfi_offset(%edi, -12)
181 cfi_offset(%ebx, -16)
182 cfi_offset(%ebp, -20)
187 leal MUTEX(%ebp), %edx
189 movzbl PSHARED(%ebp), %ecx
193 14: cmpl %gs:TID, %eax
202 leal MUTEX(%ebp), %eax
204 movzbl PSHARED(%ebp), %ecx
205 call __lll_unlock_wake
209 8: subl $1, NR_READERS(%ebp)
214 4: subl $1, READERS_QUEUED(%ebp)
222 leal MUTEX(%ebp), %eax
224 movzbl PSHARED(%ebp), %ecx
225 call __lll_unlock_wake
232 leal MUTEX(%ebp), %edx
234 movzbl PSHARED(%ebp), %ecx
238 16: movl $-ETIMEDOUT, %esi
241 19: movl $EINVAL, %edx
244 .size pthread_rwlock_timedrdlock,.-pthread_rwlock_timedrdlock