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/*
* Copyright (C) 2007-2013 Xagasoft, All rights reserved.
*
* This file is part of the libbu++ library and is released under the
* terms of the license contained in the file LICENSE.
*/
#include <bu/readwritemutex.h>
#include <bu/thread.h>
#include <bu/randomcmwc.h>
#include <bu/sio.h>
using namespace Bu;
#define CNT 15
char disp[CNT*2+1];
ReadWriteMutex mRW;
bool bRunning;
int rbase;
Mutex mDisp;
void dispUpd( char &ind, char val )
{
mDisp.lock();
ind = val;
println(disp);
mDisp.unlock();
}
class Writer : public Thread
{
public:
Writer( int iId, char &ind ) :
iId( iId ),
rand( rbase+iId ),
ind( ind )
{
}
virtual ~Writer()
{
}
protected:
virtual void run()
{
usleep( rand.rand(1000000) );
while( bRunning )
{
mRW.lockWrite();
dispUpd( ind, 'W' );
// println("Writer %1 locking.").arg( iId );
usleep( rand.rand(1,10)*10000 );
// println("Writer %1 unlocking.").arg( iId );
dispUpd( ind, ' ' );
mRW.unlockWrite();
usleep( rand.rand(5,10)*10000 );
}
}
private:
int iId;
RandomCmwc rand;
char &ind;
};
class Reader : public Thread
{
public:
Reader( int iId, char &ind ) :
iId( iId ),
rand( rbase-iId ),
ind( ind )
{
}
virtual ~Reader()
{
}
protected:
virtual void run()
{
usleep( rand.rand(1000000) );
while( bRunning )
{
mRW.lockRead();
dispUpd( ind, 'R' );
// println("Reader %1 locking.").arg( iId );
usleep( rand.rand(1,10)*10000 );
// println("Reader %1 unlocking.").arg( iId );
dispUpd( ind, ' ' );
mRW.unlockRead();
usleep( rand.rand(5,10)*10000 );
}
}
private:
int iId;
RandomCmwc rand;
char &ind;
};
int main()
{
bRunning = true;
rbase = time( NULL );
memset( disp, 0x20, CNT*2+1 );
disp[CNT*2] = 0;
Thread **threads = new Thread*[CNT*2];
for( int j = 0; j < CNT; j++ )
{
threads[j] = new Reader( j+1, disp[j+CNT] );
threads[j+CNT] = new Writer( j+1, disp[j] );
}
for( int j = 0; j < CNT*2; j++ )
threads[j]->start();
sleep( 120 );
bRunning = false;
for( int j = 0; j < CNT*2; j++ )
{
threads[j]->join();
delete threads[j];
}
delete[] threads;
return 0;
}
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