1 a.dunfey 1.2.2.1 //%2006////////////////////////////////////////////////////////////////////////

  2 mike     1.2     //
  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 a.dunfey 1.2.2.1 // Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.;
 12                  // EMC Corporation; Symantec Corporation; The Open Group.

 13 mike     1.2     //
 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 a.dunfey 1.2.2.1 // 

 21 mike     1.2     // 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_IX86_GNU_h
 37                  #define _Pegasus_Common_AtomicInt_LINUX_IX86_GNU_h
 38                  
 39                  #include <Pegasus/Common/Config.h>
 40                  
 41                  // Note: this lock can be eliminated for single processor systems.
 42 mike     1.2     #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     1.2     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     1.2     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     1.2     PEGASUS_NAMESPACE_END
106                  
107                  #endif /* _Pegasus_Common_AtomicInt_LINUX_IX86_GNU_h */