1 karl  1.4 //%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  1.4 // 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  1.4 // 

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, Inova Europe (mike-brasher@austin.rr.com)
33           //
34           //%/////////////////////////////////////////////////////////////////////////////
35           
36           #ifndef Pegasus_SpinLock_h
37           #define Pegasus_SpinLock_h
38           
39           #include <Pegasus/Common/Config.h>
40           

41 mike  1.2 #if defined (PEGASUS_PLATFORM_HPUX_PARISC_ACC)

42 mike  1.1 # include <Pegasus/Common/SpinLock_HPUX_PARISC_ACC.h>
43           #elif defined (PEGASUS_PLATFORM_SOLARIS_SPARC_GNU)
44           # include <Pegasus/Common/SpinLock_SOLARIS_SPARC_GNU.h>
45           #elif defined (PEGASUS_PLATFORM_LINUX_IX86_GNU)
46           # include <Pegasus/Common/SpinLock_LINUX_IX86_GNU.h>
47           #elif defined (PEGASUS_PLATFORM_LINUX_IX86_64_GNU)
48           # include <Pegasus/Common/SpinLock_LINUX_IX86_GNU.h>
49           #else
50           # include <Pegasus/Common/SpinLock_Generic.h>
51           #endif
52           
53           #define PEGASUS_NUM_SHARED_SPIN_LOCKS 64
54           
55           PEGASUS_NAMESPACE_BEGIN
56           

57 kumpf 1.3 // This array defines spin locks shared across the system. These are 
58           // initialized by calling SpinLockCreatePool().
59           extern SpinLock spinLockPool[PEGASUS_NUM_SHARED_SPIN_LOCKS];

60 mike  1.1 

61 kumpf 1.3 // This flag is 0 until SpinLockCreatePool() is called, which sets it
62           // to 1.
63           extern int spinLockPoolInitialized;
64           
65           // Initializes the global pool of mutexes.
66           void SpinLockCreatePool();
67           
68           // Maps an address into the spinLockPool[] array defined above. This is used

69 mike  1.1 // to assign objects (by their addresses) to a shared lock. Collisions are 
70           // okay.
71           inline size_t SpinLockIndex(const void* x)
72           {
73               // Throw away the lower two bits since they are almost always zero
74               // anyway due to alignment properties.
75               return ((unsigned long)x >> 2) % PEGASUS_NUM_SHARED_SPIN_LOCKS;
76           }
77           

78 kumpf 1.3 // Call this function before forking to unlock the spinlocks in the global
79           // spinlock pool (spinLockPool).
80           void SpinLockInit();
81           

82 mike  1.1 PEGASUS_NAMESPACE_END
83           
84           #endif /* Pegasus_SpinLock_h */