projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 76a50749 UD |
1 | /* Copyright (C) 2002 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. | |
| 3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. | |
| 4 | ||
| 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. | |
| 9 | ||
| 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. | |
| 14 | ||
| 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 | |
| 18 | 02111-1307 USA. */ | |
| 19 | ||
| 20 | #include <sysdep.h> | |
| 21 | ||
| 22 | .text | |
| 23 | ||
| 24 | #ifdef UP | |
| 25 | # define LOCK | |
| 26 | #else | |
| 27 | # define LOCK lock | |
| 28 | #endif | |
| 29 | ||
| 30 | #define SYS_gettimeofday __NR_gettimeofday | |
| 31 | #define SYS_futex 240 | |
| 32 | #define FUTEX_WAIT 0 | |
| 33 | #define FUTEX_WAKE 1 | |
| 34 | ||
| 35 | #define ETIMEDOUT 110 | |
| 36 | ||
| 37 | ||
| 38 | .globl __lll_lock_wait | |
| 39 | .type __lll_lock_wait,@function | |
| 40 | .hidden __lll_lock_wait | |
| 41 | .align 16 | |
| 42 | __lll_lock_wait: | |
| 43 | pushl %esi | |
| 44 | pushl %ebx | |
| 45 | pushl %edx | |
| 46 | ||
| 47 | movl %ecx, %ebx | |
| 48 | xorl %esi, %esi /* No timeout. */ | |
| 49 | xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */ | |
| 50 | 1: | |
| 51 | leal -1(%eax), %edx /* account for the preceeded xadd. */ | |
| 52 | movl $SYS_futex, %eax | |
| 53 | int $0x80 | |
| 54 | ||
| 55 | orl $-1, %eax /* Load -1. */ | |
| 56 | LOCK | |
| 57 | xaddl %eax, (%ebx) | |
| 58 | jne 1b | |
| 59 | ||
| 60 | movl $-1, (%ebx) | |
| 61 | ||
| 62 | popl %edx | |
| 63 | popl %ebx | |
| 64 | popl %esi | |
| 65 | ret | |
| 66 | .size __lll_lock_wait,.-__lll_lock_wait | |
| 67 | ||
| 68 | ||
| 69 | .globl lll_unlock_wake_cb | |
| 70 | .type lll_unlock_wake_cb,@function | |
| 71 | .hidden lll_unlock_wake_cb | |
| 72 | .align 16 | |
| 73 | lll_unlock_wake_cb: | |
| 74 | pushl %esi | |
| 75 | pushl %ebx | |
| 76 | pushl %ecx | |
| 77 | pushl %edx | |
| 78 | ||
| 79 | movl 20(%esp), %ebx | |
| 80 | LOCK | |
| 81 | incl (%ebx) | |
| 82 | jng 1f | |
| 83 | ||
| 84 | popl %edx | |
| 85 | popl %ecx | |
| 86 | popl %ebx | |
| 87 | popl %esi | |
| 88 | ret | |
| 89 | .size lll_unlock_wake_cb,.-lll_unlock_wake_cb | |
| 90 | ||
| 91 | ||
| 92 | .globl __lll_unlock_wake | |
| 93 | .type __lll_unlock_wake,@function | |
| 94 | .hidden __lll_unlock_wake | |
| 95 | __lll_unlock_wake: | |
| 96 | pushl %esi | |
| 97 | pushl %ebx | |
| 98 | pushl %ecx | |
| 99 | pushl %edx | |
| 100 | ||
| 101 | movl %eax, %ebx | |
| 102 | 1: movl $FUTEX_WAKE, %ecx | |
| 103 | movl $1, %edx /* Wake one thread. */ | |
| 104 | xorl %esi, %esi | |
| 105 | movl %edx, (%ebx) /* Stores '$1'. */ | |
| 106 | movl $SYS_futex, %eax | |
| 107 | int $0x80 | |
| 108 | ||
| 109 | popl %edx | |
| 110 | popl %ecx | |
| 111 | popl %ebx | |
| 112 | popl %esi | |
| 113 | ret | |
| 114 | .size __lll_unlock_wake,.-__lll_unlock_wake | |
| 115 | ||
| 116 | ||
| 117 | .globl __lll_timedwait_tid | |
| 118 | .type __lll_timedwait_tid,@function | |
| 119 | .hidden __lll_timedwait_tid | |
| 120 | __lll_timedwait_tid: | |
| 121 | pushl %edi | |
| 122 | pushl %esi | |
| 123 | pushl %ebx | |
| 124 | pushl %ebp | |
| 125 | ||
| 126 | movl %eax, %ebp | |
| 127 | movl %edx, %edi | |
| 128 | subl $8, %esp | |
| 129 | ||
| 130 | /* Get current time. */ | |
| 131 | 2: movl %esp, %ebx | |
| 132 | xorl %ecx, %ecx | |
| 133 | movl $SYS_gettimeofday, %eax | |
| 134 | int $0x80 | |
| 135 | ||
| 136 | /* Compute relative timeout. */ | |
| 137 | movl 4(%esp), %eax | |
| 138 | movl $1000, %edx | |
| 139 | mul %edx /* Milli seconds to nano seconds. */ | |
| 140 | movl (%edi), %ecx | |
| 141 | movl 4(%edi), %edx | |
| 142 | subl (%esp), %ecx | |
| 143 | subl %eax, %edx | |
| 144 | jns 5f | |
| 145 | addl $1000000000, %edx | |
| 146 | decl %ecx | |
| 147 | 5: testl %ecx, %ecx | |
| 148 | js 6f /* Time is already up. */ | |
| 149 | ||
| 150 | movl %ecx, (%esp) /* Store relative timeout. */ | |
| 151 | movl %edx, 4(%esp) | |
| 152 | ||
| 153 | movl (%ebp), %edx | |
| 154 | testl %edx, %edx | |
| 155 | jz 4f | |
| 156 | ||
| 157 | movl %esp, %esi | |
| 158 | xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */ | |
| 159 | movl %ebp, %ebx | |
| 160 | movl $SYS_futex, %eax | |
| 161 | int $0x80 | |
| 162 | ||
| 163 | movl %eax, %edx | |
| 164 | ||
| 165 | cmpl $0, (%ebx) | |
| 166 | jne 1f | |
| 167 | 4: xorl %eax, %eax | |
| 168 | ||
| 169 | 3: addl $8, %esp | |
| 170 | popl %ebp | |
| 171 | popl %ebx | |
| 172 | popl %esi | |
| 173 | popl %edi | |
| 174 | ret | |
| 175 | ||
| 176 | 1: cmpl $-ETIMEDOUT, %edx | |
| 177 | jne 2b | |
| 178 | 6: movl $ETIMEDOUT, %eax | |
| 179 | jmp 3b | |
| 180 | .size __lll_timedwait_tid,.-__lll_timedwait_tid |