source: xplcommon/test/testevent.cc@ 8:dba41f33ddce

// Copyright (c) 2012 by István Váradi

// This file is part of libxplcommon, a common utility library for
// development related to X-Plane

// Redistribution and use 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. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// The views and conclusions contained in the software and documentation are those
// of the authors and should not be interpreted as representing official policies,
// either expressed or implied, of the FreeBSD Project.

//------------------------------------------------------------------------------

#include <xplcommon/Thread.h>
#include <xplcommon/Waiter.h>
#include <xplcommon/WaitableEvent.h>

#include <cstdio>

//------------------------------------------------------------------------------

using xplcommon::Thread;
using xplcommon::Waiter;
using xplcommon::WaitableEvent;

//------------------------------------------------------------------------------

class ServerThread : public Thread
{
private:
    Waiter waiter;

    WaitableEvent event;

public:
    ServerThread();

    WaitableEvent& getEvent();

    virtual void run();
};

//------------------------------------------------------------------------------

inline ServerThread::ServerThread() :
    event(&waiter)
{
}

//------------------------------------------------------------------------------

inline WaitableEvent& ServerThread::getEvent()
{
    return event;
}

//------------------------------------------------------------------------------

void ServerThread::run()
{
    printf("ServerThread::run\n");
    while(!event.check()) {
        printf("ServerThread::run: waiting...\n");
        waiter.wait();
        printf("ServerThread::run: waiting done\n");
    }
    printf("ServerThread::run: finished\n");
}

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

class BlockingServerThread : public Thread
{
private:
    WaitableEvent event;

public:
    WaitableEvent& getEvent();

    virtual void run();
};

//------------------------------------------------------------------------------

inline WaitableEvent& BlockingServerThread::getEvent()
{
    return event;
}

//------------------------------------------------------------------------------

void BlockingServerThread::run()
{
    printf("BlockingServerThread::run: waiting...\n");
    if (event.check()) {
        printf("BlockingServerThread::run: waiting done\n");
    } else {
        printf("BlockingServerThread::run: waiting failed\n");
    }
    printf("BlockingServerThread::run: finished\n");
}


//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

class ClientThread : public Thread
{
private:
    WaitableEvent& event;

public:
    ClientThread(WaitableEvent& event);

    virtual void run();
};

//------------------------------------------------------------------------------

inline ClientThread::ClientThread(WaitableEvent& event) :
    event(event)
{
}

//------------------------------------------------------------------------------

void ClientThread::run()
{
    printf("ClientThread::run: sleeping\n");
    sleep(2000);
    printf("ClientThread::run: firing event\n");
    event.fire();
}

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

template <class Server> void runTest()
{
    Server serverThread;
    ClientThread clientThread(serverThread.getEvent());

    printf("Starting threads\n");
    serverThread.start();
    clientThread.start();

    printf("Waiting for the client thread\n");
    clientThread.join();
    printf("Waiting for the server thread\n");
    serverThread.join();
    printf("Both threads returned\n");
}

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

int main()
{
    printf("Running the event test with a non-blocking WaitableEvent\n\n");
    runTest<ServerThread>();

    printf("\n\nRunning the event test with a blocking WaitableEvent\n\n");
    runTest<BlockingServerThread>();

    return 0;
}

//------------------------------------------------------------------------------

// Local Variables:
// mode: C++
// c-basic-offset: 4
// indent-tabs-mode: nil
// End: