]> git.saurik.com Git - apple/libc.git/blob - pthreads/lock.s
8d1b277025b5605b0f832deac007ffe56ac09f30
[apple/libc.git] / pthreads / lock.s
1 /*
2 * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
7 *
8 * This file contains Original Code and/or Modifications of Original Code
9 * as defined in and that are subject to the Apple Public Source License
10 * Version 2.0 (the 'License'). You may not use this file except in
11 * compliance with the License. Please obtain a copy of the License at
12 * http://www.opensource.apple.com/apsl/ and read it before using this
13 * file.
14 *
15 * The Original Code and all software distributed under the License are
16 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
17 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
18 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
20 * Please see the License for the specific language governing rights and
21 * limitations under the License.
22 *
23 * @APPLE_LICENSE_HEADER_END@
24 */
25 /*
26 * Copyright 1996 1995 by Open Software Foundation, Inc. 1997 1996 1995 1994 1993 1992 1991
27 * All Rights Reserved
28 *
29 * Permission to use, copy, modify, and distribute this software and
30 * its documentation for any purpose and without fee is hereby granted,
31 * provided that the above copyright notice appears in all copies and
32 * that both the copyright notice and this permission notice appear in
33 * supporting documentation.
34 *
35 * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
36 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
37 * FOR A PARTICULAR PURPOSE.
38 *
39 * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
40 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
41 * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
42 * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
43 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
44 *
45 */
46
47 #define __APPLE_API_PRIVATE
48 #include <machine/cpu_capabilities.h>
49 #undef __APPLE_API_PRIVATE
50
51 #if defined(__ppc__) || defined(__ppc64__)
52
53 #import <architecture/ppc/asm_help.h>
54 #import <architecture/ppc/pseudo_inst.h>
55
56 /* void spin_lock(int *p);
57 *
58 * Lock the lock pointed to by `p'. Spin (possibly forever) until
59 * the lock is available. Test and test and set logic used.
60 * These routines have moved to the comm page.
61 */
62
63 .text
64 .align 2
65 LEAF(__spin_lock_try)
66 ba _COMM_PAGE_SPINLOCK_TRY
67 END(__spin_lock_try)
68
69 .globl _spin_lock
70 LEAF(__spin_lock)
71 _spin_lock:
72 ba _COMM_PAGE_SPINLOCK_LOCK
73 END(__spin_lock)
74
75 /* void spin_unlock(int *p);
76 *
77 * Unlock the lock pointed to by p.
78 */
79 .globl _spin_unlock
80 LEAF(__spin_unlock)
81 _spin_unlock:
82 ba _COMM_PAGE_SPINLOCK_UNLOCK
83 END(__spin_unlock)
84
85 #elif defined(__i386__)
86
87 #include <architecture/i386/asm_help.h>
88
89 /*
90 * void
91 * _spin_lock(p)
92 * int *p;
93 *
94 * Lock the lock pointed to by p. Spin (possibly forever) until the next
95 * lock is available.
96 */
97 TEXT
98 ALIGN
99
100 .globl _spin_lock_try
101 LEAF(__spin_lock_try, 0)
102 _spin_lock_try:
103 movl $(_COMM_PAGE_SPINLOCK_TRY), %eax
104 jmpl %eax
105
106 ALIGN
107
108 .globl _spin_lock
109 LEAF(__spin_lock, 0)
110 _spin_lock:
111 movl $(_COMM_PAGE_SPINLOCK_LOCK), %eax
112 jmpl %eax
113
114 /*
115 * void
116 * _spin_unlock(p)
117 * int *p;
118 *
119 * Unlock the lock pointed to by p.
120 */
121 ALIGN
122
123 .globl _spin_unlock
124 LEAF(__spin_unlock, 0)
125 _spin_unlock:
126 movl $(_COMM_PAGE_SPINLOCK_UNLOCK), %eax
127 jmpl %eax
128
129 #else
130 #error spin_locks not defined for this architecture
131 #endif