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 */