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pvminterface.h

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00001 /** @file pvminterface.h */
00002 /* 
00003  * Copyright (C) 2002 Laird Breyer
00004  *  
00005  * This program is free software; you can redistribute it and/or modify
00006  * it under the terms of the GNU General Public License as published by
00007  * the Free Software Foundation; either version 2 of the License, or
00008  * (at your option) any later version.
00009  * 
00010  * This program is distributed in the hope that it will be useful,
00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013  * GNU General Public License for more details.
00014  * 
00015  * You should have received a copy of the GNU General Public License
00016  * along with this program; if not, write to the Free Software
00017  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00018  * 
00019  * Author:   Laird Breyer <laird@lbreyer.com>
00020  */
00021 
00022 #ifndef _PVM_INTERFACE_H
00023 #define _PVM_INTERFACE_H
00024 
00025 #ifdef DISTRIBUTED_COMPUTING
00026 // don't inclued anything above this line
00027 #include <pvm3.h>
00028 #endif
00029 
00030 #include "basictypes.h"
00031 #include <stdexcept>
00032 
00033 #define PVMINTERFACE_NAMELEN 20
00034 #define PVMINTERFACE_SENDINFO 1
00035 #define PVMINTERFACE_SENDCOMMAND 2
00036 #define PVMINTERFACE_SENDLEAFUPD 3
00037 
00038 /// Contains vital task information.
00039 struct PVMTaskInfo {
00040   int tid;
00041   uint32 start_id;
00042   uint32 stop_id;
00043   char name[PVMINTERFACE_NAMELEN+1];
00044 };
00045 
00046 /// Handles communication between Talker and PVM
00047 class PVMInterface {
00048  public:
00049   PVMInterface(const char* name, 
00050                bool ismaster, int ntasks, 
00051                int stardid, int stopid) throw (runtime_error);
00052   ~PVMInterface();
00053 
00054   void BroadcastCommand(const char* commandline) throw (runtime_error);
00055   void SendCommand(int taskno, const char* commandline) throw (runtime_error);
00056   void GetCommandWithTimeout(char* commandline) throw (runtime_error);
00057 
00058   bool MessagePending();
00059   int LastMessageOriginator();
00060 
00061   bool AllStandby() throw (runtime_error);
00062   void LeaveStandbyGroup();
00063   void JoinStandbyGroup();
00064 
00065   int FindTask(uint32 id);
00066   const char* Name(int k);
00067   int NumberOfTasks() 
00068     { return num_tasks; }
00069   int NumberOfOtherTasks() 
00070     { return num_tasks - 1; }
00071   uint32 StartID(int k) 
00072     { assert(k < num_tasks - 1); return tasklist[k].start_id; }
00073   uint32 StopID(int k) 
00074     { assert(k < num_tasks - 1); return tasklist[k].stop_id; }
00075 
00076   bool IsMaster() 
00077     { return is_master; }
00078   bool IsSlave() 
00079     { return !(is_master || (num_tasks > 0)); }
00080 
00081   void GetLeafCounts(unsigned int* countsarray, uint32* size) throw (runtime_error);
00082   void SendLeafCounts(int tid, unsigned int* countsarray, uint32 size) throw (runtime_error);  
00083 
00084  private:
00085   PVMTaskInfo myinfo;
00086   bool is_master;
00087   int num_tasks;
00088   
00089   PVMTaskInfo *tasklist;
00090 
00091   int last_message_tid;
00092   int last_message_size;
00093   int last_message_msgtag;
00094 };
00095 
00096 #endif

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