/[escript]/trunk/escript/src/Utils.h
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temp_trunk_copy/escript/src/Utils.h revision 1384 by phornby, Fri Jan 11 02:29:38 2008 UTC trunk/escript/src/Utils.h revision 2607 by jfenwick, Tue Aug 18 01:02:56 2009 UTC
# Line 1  Line 1 
1    
 /* $Id$ */  
   
2  /*******************************************************  /*******************************************************
3   *  *
4   *           Copyright 2003-2007 by ACceSS MNRF  * Copyright (c) 2003-2009 by University of Queensland
5   *       Copyright 2007 by University of Queensland  * Earth Systems Science Computational Center (ESSCC)
6   *  * http://www.uq.edu.au/esscc
7   *                http://esscc.uq.edu.au  *
8   *        Primary Business: Queensland, Australia  * Primary Business: Queensland, Australia
9   *  Licensed under the Open Software License version 3.0  * Licensed under the Open Software License version 3.0
10   *     http://www.opensource.org/licenses/osl-3.0.php  * http://www.opensource.org/licenses/osl-3.0.php
11   *  *
12   *******************************************************/  *******************************************************/
13    
14    
15  #if !defined  escript_Utils_H  #if !defined  escript_Utils_H
16  #define escript_Utils_H  #define escript_Utils_H
# Line 33  namespace escript { Line 32  namespace escript {
32    
33    /**    /**
34       \brief       \brief
35         print a message about how many MPI CPUs and OpenMP threads we're using
36      */
37      ESCRIPT_DLL_API void printParallelThreadCnt();
38    
39      /**
40         \brief
41       set the number of threads       set the number of threads
42         \warning Use of this method is strongly discouraged. It may be deprecated in future.
43    */    */
44    ESCRIPT_DLL_API void setNumberOfThreads(const int num_threads);    ESCRIPT_DLL_API void setNumberOfThreads(const int num_threads);
45    
# Line 43  namespace escript { Line 49  namespace escript {
49    */    */
50    ESCRIPT_DLL_API int getNumberOfThreads();    ESCRIPT_DLL_API int getNumberOfThreads();
51    
52      /**
53         \brief
54         returns the total number of available MPI processes for MPI_COMM_WORLD
55      */
56      ESCRIPT_DLL_API int getMPISizeWorld();
57    
58      /**
59         \brief
60         returns the MPI processor number within MPI_COMM_WORLD
61      */
62      ESCRIPT_DLL_API int getMPIRankWorld();
63      /**
64         \brief
65         returns the maximum value of an integer over all processors within MPI_COMM_WORLD
66      */
67      ESCRIPT_DLL_API int getMPIWorldMax(const int val);
68    
69      /**
70         \brief returns sum of an integer over all processors with MPI_COMM_WORLD
71      */
72      ESCRIPT_DLL_API int getMPIWorldSum(const int val);
73    
74      /**
75        \brief performs a barrier synchronization across all processors.
76      */
77    
78      ESCRIPT_DLL_API void MPIBarrierWorld();
79    
80     /**
81        \brief
82        returns machine precision
83     */
84     ESCRIPT_DLL_API double getMachinePrecision();
85     /*
86       \brief
87       return largest positive float
88     */
89     ESCRIPT_DLL_API double getMaxFloat();
90    
91  } // end of namespace  } // end of namespace
92  #endif  #endif

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