1 karl  1.2 //%2006////////////////////////////////////////////////////////////////////////

  2 mike  1.1 //
  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 karl  1.2 // Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.;
 12           // EMC Corporation; Symantec Corporation; The Open Group.

 13 mike  1.1 //
 14           // Permission is hereby granted, free of charge, to any person obtaining a copy
 15           // of this software and associated documentation files (the "Software"), to
 16           // deal in the Software without restriction, including without limitation the
 17           // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 18           // sell copies of the Software, and to permit persons to whom the Software is
 19           // furnished to do so, subject to the following conditions:

 20 karl  1.2 // 

 21 mike  1.1 // THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN
 22           // ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED
 23           // "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
 24           // LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 25           // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 26           // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 27           // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 28           // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 29           //
 30           //==============================================================================
 31           //
 32           // Author: Mike Brasher (mike-brasher@austin.rr.com) - Inova Europe
 33           //
 34           //%/////////////////////////////////////////////////////////////////////////////
 35           
 36           #ifndef _Pegasus_Common_AtomicInt_LINUX_X86_64_GNU_h
 37           #define _Pegasus_Common_AtomicInt_LINUX_X86_64_GNU_h
 38           
 39           #include <Pegasus/Common/Config.h>
 40           
 41           // Note: this lock can be eliminated for single processor systems.
 42 mike  1.1 #define PEGASUS_ATOMIC_LOCK "lock ; "
 43           
 44           PEGASUS_NAMESPACE_BEGIN
 45           
 46           struct AtomicType
 47           {
 48               volatile int n; 
 49           };
 50           
 51           PEGASUS_TEMPLATE_SPECIALIZATION
 52           inline AtomicIntTemplate<AtomicType>::AtomicIntTemplate(Uint32 n)
 53           {
 54               _rep.n = n;
 55           }
 56           
 57           PEGASUS_TEMPLATE_SPECIALIZATION
 58           inline AtomicIntTemplate<AtomicType>::~AtomicIntTemplate()
 59           {
 60           }
 61           
 62           PEGASUS_TEMPLATE_SPECIALIZATION
 63 mike  1.1 inline Uint32 AtomicIntTemplate<AtomicType>::get() const
 64           {
 65               return _rep.n;
 66           }
 67           
 68           PEGASUS_TEMPLATE_SPECIALIZATION
 69           inline void AtomicIntTemplate<AtomicType>::set(Uint32 n)
 70           {
 71               _rep.n = n;
 72           }
 73           
 74           PEGASUS_TEMPLATE_SPECIALIZATION
 75           inline void AtomicIntTemplate<AtomicType>::inc()
 76           {
 77               asm volatile(
 78           	PEGASUS_ATOMIC_LOCK "incl %0"
 79           	:"=m" (_rep.n)
 80           	:"m" (_rep.n));
 81           }
 82           
 83           PEGASUS_TEMPLATE_SPECIALIZATION
 84 mike  1.1 inline void AtomicIntTemplate<AtomicType>::dec()
 85           {
 86               asm volatile(
 87                   PEGASUS_ATOMIC_LOCK "decl %0"
 88                   :"=m" (_rep.n)
 89                   :"m" (_rep.n));
 90           }
 91           
 92           PEGASUS_TEMPLATE_SPECIALIZATION
 93           inline bool AtomicIntTemplate<AtomicType>::decAndTestIfZero()
 94           {
 95               unsigned char c;
 96           
 97               asm volatile(
 98           	PEGASUS_ATOMIC_LOCK "decl %0; sete %1"
 99           	:"=m" (_rep.n), "=qm" (c)
100           	:"m" (_rep.n) : "memory");
101           
102               return c != 0;
103           }
104           
105 mike  1.1 PEGASUS_NAMESPACE_END
106           
107           #endif /* _Pegasus_Common_AtomicInt_LINUX_X86_64_GNU_h */