/[escript]/trunk/escript/src/Utils.h
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revision 1805 by ksteube, Wed Sep 24 23:39:00 2008 UTC 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 40  namespace escript { Line 39  namespace escript {
39    /**    /**
40       \brief       \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 60  namespace escript { Line 60  namespace escript {
60       returns the MPI processor number within MPI_COMM_WORLD       returns the MPI processor number within MPI_COMM_WORLD
61    */    */
62    ESCRIPT_DLL_API int getMPIRankWorld();    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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