1 mike 1.2 //%2005////////////////////////////////////////////////////////////////////////
2 //
3 // Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
4 // Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
5 // Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
6 // IBM Corp.; EMC Corporation, The Open Group.
7 // Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
8 // IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
9 // Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
10 // EMC Corporation; VERITAS Software Corporation; The Open Group.
11 //
12 // Permission is hereby granted, free of charge, to any person obtaining a copy
13 // of this software and associated documentation files (the "Software"), to
14 // deal in the Software without restriction, including without limitation the
15 // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
16 // sell copies of the Software, and to permit persons to whom the Software is
17 // furnished to do so, subject to the following conditions:
18 //
19 // THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN
20 // ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED
21 // "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
22 mike 1.2 // LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
23 // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
24 // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
25 // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 //
28 //==============================================================================
29 //
30 // Author: Mike Brasher (mike-brasher@austin.rr.com) - Inova Europe
31 //
32 //%/////////////////////////////////////////////////////////////////////////////
33
34 #ifndef _Pegasus_Common_AtomicInt_LINUX_IX86_GNU_h
35 #define _Pegasus_Common_AtomicInt_LINUX_IX86_GNU_h
36
37 #include <Pegasus/Common/Config.h>
38
39 // Note: this lock can be eliminated for single processor systems.
40 #define PEGASUS_ATOMIC_LOCK "lock ; "
41
42 PEGASUS_NAMESPACE_BEGIN
43 mike 1.2
44 struct AtomicType
45 {
46 volatile int n;
47 };
48
49 PEGASUS_TEMPLATE_SPECIALIZATION
50 inline AtomicIntTemplate<AtomicType>::AtomicIntTemplate(Uint32 n)
51 {
52 _rep.n = n;
53 }
54
55 PEGASUS_TEMPLATE_SPECIALIZATION
56 inline AtomicIntTemplate<AtomicType>::~AtomicIntTemplate()
57 {
58 }
59
60 PEGASUS_TEMPLATE_SPECIALIZATION
61 inline Uint32 AtomicIntTemplate<AtomicType>::get() const
62 {
63 return _rep.n;
64 mike 1.2 }
65
66 PEGASUS_TEMPLATE_SPECIALIZATION
67 inline void AtomicIntTemplate<AtomicType>::set(Uint32 n)
68 {
69 _rep.n = n;
70 }
71
72 PEGASUS_TEMPLATE_SPECIALIZATION
73 inline void AtomicIntTemplate<AtomicType>::inc()
74 {
75 asm volatile(
76 PEGASUS_ATOMIC_LOCK "incl %0"
77 :"=m" (_rep.n)
78 :"m" (_rep.n));
79 }
80
81 PEGASUS_TEMPLATE_SPECIALIZATION
82 inline void AtomicIntTemplate<AtomicType>::dec()
83 {
84 asm volatile(
85 mike 1.2 PEGASUS_ATOMIC_LOCK "decl %0"
86 :"=m" (_rep.n)
87 :"m" (_rep.n));
88 }
89
90 PEGASUS_TEMPLATE_SPECIALIZATION
91 inline bool AtomicIntTemplate<AtomicType>::decAndTestIfZero()
92 {
93 unsigned char c;
94
95 asm volatile(
96 PEGASUS_ATOMIC_LOCK "decl %0; sete %1"
97 :"=m" (_rep.n), "=qm" (c)
98 :"m" (_rep.n) : "memory");
99
100 return c != 0;
101 }
102
103 PEGASUS_NAMESPACE_END
104
105 #endif /* _Pegasus_Common_AtomicInt_LINUX_IX86_GNU_h */
|