msgpipe.C

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/*
 * Copyright (c) 2024
 *      Side Effects Software Inc.  All rights reserved.
 *
 * Redistribution and use of Houdini Development Kit samples in source and
 * binary forms, with or without modification, are permitted provided that the
 * following conditions are met:
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. The name of Side Effects Software may not be used to endorse or
 *    promote products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY SIDE EFFECTS SOFTWARE `AS IS' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 * NO EVENT SHALL SIDE EFFECTS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
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#include <CMD/CMD_Args.h>
#include <UT/UT_Assert.h>
#include <UT/UT_Exit.h>
#include <UT/UT_IStream.h>
#include <UT/UT_Main.h>
#include <UT/UT_OFStream.h>
#include <UT/UT_NetMessage.h>

#include <ostream>
#include <iostream>
#include <stdio.h>


static void
usage(const char *program)
{
    std::cerr << "Usage: " << program << " tracker port thisslicenumber numslice\n";
}

#define DATA_LEN        80000
#define PIPE_ATTEMPTS   10


// Transfer data between peers using a UT_NetMessagePipe
//
// Build using:
//      hcustom -s msgpipe.C
//
// Example usage:
//      python simtracker.py 8000 9000
//      msgpipe localhost 8000 0 2
//      msgpipe localhost 8000 1 2
//
int
theMain(int argc, char *argv[])
{
    CMD_Args             args;

    args.initialize(argc, argv);

    if (args.argc() != 5)
    {
        usage(argv[0]);
        return 1;
    }

    const char          *tracker = args.argv(1);
    int                 port = SYSatoi(args.argv(2));
    int                 thisslice = SYSatoi(args.argv(3));
    int                 numslice = SYSatoi(args.argv(4));

    std::cerr << "Building connection to tracker " << tracker << ":" << port << std::endl;
    std::cerr << "I am slice " << thisslice << " out of " << numslice << std::endl;

    // Use a net exchange to send some data between the slices.
    {
        std::cerr << "Simple Exchange Test" << std::endl;
        UT_NetExchange          netxchg(tracker, port, thisslice, numslice, "normalexchange");

        for (int peer = 0; peer < numslice; peer++)
        {
            UT_NetMessage               *msg = new UT_NetMessage();
            msg->setWriteDataLength(8 + DATA_LEN * sizeof(int32));

            for (int i = 0; i < DATA_LEN; i++)
            {
                msg->overwriteInt32(8 + i * sizeof(int32), i + peer);
            }
            netxchg.sendData(peer, msg);
        }

        UT_ValArray<UT_NetMessage *>    completed;
        if (!netxchg.receiveDataLoop(completed, numslice))
        {
            std::cerr << "Failure to do traditional data exchange, got " << completed.entries() << std::endl;
            return -1;
        }

        // Now verify our messages are legit.  They should all be encoded
        // with our peer infor.
        for (int i = 0; i < completed.entries(); i++)
        {
            UT_NetMessage               *msg = completed(i);

            for (int i = 0; i < DATA_LEN; i++)
            {
                int32           val;
                int32           goalval;
                goalval = i + thisslice;

                val = msg->extractInt32(8 + i * sizeof(int32));

                if (val != goalval)
                {
                    std::cerr << "Error, got " << val << " at integer index " << i << " rather than expected " << goalval << ", source slice was " << msg->extractInt16(6) << std::endl;
                    return -1;
                }
            }

            delete msg;
        }
    }

    // Use a net message pipe to repeatedly pump data along the same
    // socket.
    {
        std::cerr << "Message Pipe Tests" << std::endl;
        UT_NetMessagePipe       pipe(tracker, port, thisslice, numslice, "messagepipe");

        // pipe.setCompressionThreshold(-1);

        if (!pipe.openPipes())
        {
            std::cerr << "Failed to open message pipes" << std::endl;
            return -1;
        }

        for (int j = 0; j < PIPE_ATTEMPTS; j++)
        {
            exint datalen = DATA_LEN;
            std::cerr << "Starting pass " << j << std::endl;
            for (int peer = 0; peer < numslice; peer++)
            {
                UT_NetMessage   *msg = pipe.readPipe(peer);

                msg->resetLength(UT_NetMessage::STATE_READPIPE, datalen * sizeof(int32));

                msg = pipe.writePipe(peer);
                msg->resetLength(UT_NetMessage::STATE_WRITEPIPE, datalen * sizeof(int32));

                for (int i = 0; i < datalen; i++)
                {
                    // NOTE: No header here!
                    msg->overwriteInt32(i * sizeof(int32), i + peer + j);
                }
            }

            // Now do the transfer.
            if (!pipe.transferData())
            {
                std::cerr << "Failed to push data across pipes!" << std::endl;
                return -1;
            }

            // Now see if it came through alright!
            // Again, all the data sent to ourselves should be our own
            // peer number.
            for (int peer = 0; peer < numslice; peer++)
            {
                UT_NetMessage   *msg = pipe.readPipe(peer);

                for (int i = 0; i < datalen; i++)
                {
                    int32               goalval = i + thisslice + j;
                    int32               val;
                    val = msg->extractInt32(i * sizeof(int32));
                    if (val != goalval)
                    {
                        std::cerr << "Error, got " << val << " at integer index " << i << " rather than expected " << goalval << ", source slice was " << peer << " and this was pipe pass " << j << std::endl;
                        return -1;
                    }
                }
            }
        }

        for (int peer = 0; peer < numslice; peer++)
        {
            UT_NetMessage       *msg = pipe.readPipe(peer);
            msg->resetLength(UT_NetMessage::STATE_READPIPE, 0);

            msg = pipe.writePipe(peer);
            msg->resetLength(UT_NetMessage::STATE_WRITEPIPE, 0);
        }

        if (!pipe.closePipes())
        {
            std::cerr << "Failed to close message pipes." << std::endl;
            return -1;
        }

    }

    std::cerr << "All transferred successfully!" << std::endl;

    return 0;
}
UT_MAIN(theMain);// exit with proper tear down