producer_consumer.cpp
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/***************************************************************************
* Copyright (C) 2005 by Jeff Ferr *
* root@sat *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "jthread.h"
#include "jmutex.h"
#include "jcondition.h"
#include "jautolock.h"
#include <iostream>
#include <string.h>
#define BUFFER_SIZE 1024
class Buffer {
private:
jthread::Mutex _lock;
jthread::Condition _empty,
_full;
char **_buffer;
int _index,
_buffer_size,
*_buffer_index;
public:
Buffer(int size = BUFFER_SIZE)
{
_buffer_size = size;
_buffer = new char*[size];
_buffer_index = new int[size];
Reset();
}
virtual ~Buffer()
{
}
void Reset()
{
_index = -1;
}
void Put(char *buffer, int size)
{
jthread::AutoLock l(&_lock);
while (_index == _buffer_size) {
_full.Wait(&_lock);
}
_index++;
_buffer[_index] = buffer;
_buffer_index[_index] = size;
_empty.Notify();
}
void Get(char **buffer, int *size)
{
jthread::AutoLock l(&_lock);
while (_index < 0) {
_empty.Wait(&_lock);
}
memcpy(*buffer, _buffer[_index], _buffer_index[_index]);
*size = _buffer_index[_index];
_index--;
_full.Notify();
}
};
Buffer buffer;
class Producer : public jthread::Thread {
public:
Producer()
{
}
virtual ~Producer()
{
}
virtual void Run()
{
std::string s = "Jeff";
for (int n = 0; n < 1000000; n++) {
buffer.Put((char *)s.c_str(), s.size());
}
buffer.Put(NULL, 0);
}
};
class Consumer : public jthread::Thread {
public:
Consumer()
{
}
virtual ~Consumer()
{
}
virtual void Run()
{
char *ptr = new char[BUFFER_SIZE];
int size = 0;
do {
buffer.Get(&ptr, &size);
std::cout << ptr << std::flush;
} while (ptr != NULL);
delete ptr;
std::cout << "[over]" << std::endl;
}
};
int main()
{
Producer p;
Consumer c;
p.Start();
c.Start();
p.WaitThread();
c.WaitThread();
return 0;
}