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// $Id: Task_ThreadPool.cpp 94310 2011-07-09 19:10:06Z schmidt $
#include "ace/config-lite.h"
#if defined (ACE_HAS_THREADS)
#include "ace/OS_NS_string.h"
#include "ace/OS_NS_time.h"
#include "ace/Task.h"
#include "ace/Synch.h"
#include "ace/SString.h"
// Listing 2 code/ch16
class Workers : public ACE_Task<ACE_MT_SYNCH>
{
public:
Workers ()
{ }
virtual int svc (void)
{
while (1)
{
ACE_Message_Block *mb = 0;
if (this->getq (mb) == -1)
{
ACE_DEBUG ((LM_INFO,
ACE_TEXT ("(%t) Shutting down\n")));
break;
}
// Process the message.
process_message (mb);
}
return 0;
}
// Listing 2
private:
void process_message (ACE_Message_Block *mb)
{
ACE_TRACE ("Workers::process_message");
int msgId;
ACE_OS::memcpy (&msgId, mb->rd_ptr (), sizeof(int));
mb->release ();
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("(%t) Started processing message %d\n"),
msgId));
ACE_OS::sleep (3);
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("(%t) Finished processing message %d\n"),
msgId));
}
};
// Listing 1 code/ch16
class Manager : public ACE_Task<ACE_MT_SYNCH>
{
public:
enum {POOL_SIZE = 5, MAX_TIMEOUT = 5};
Manager () : shutdown_(0)
{
ACE_TRACE ("Manager::Manager");
}
int svc (void)
{
ACE_TRACE ("Manager::svc");
ACE_DEBUG ((LM_INFO, ACE_TEXT ("(%t) Manager started\n")));
// Create pool.
Workers pool;
pool.activate (THR_NEW_LWP | THR_JOINABLE, POOL_SIZE);
while (!done ())
{
ACE_Message_Block *mb = 0;
ACE_Time_Value tv ((long)MAX_TIMEOUT);
tv += ACE_OS::time (0);
// Get a message request.
if (this->getq (mb, &tv) < 0)
{
pool.msg_queue ()->deactivate ();
pool.wait ();
break;
}
// Ask the worker pool to do the job.
pool.putq (mb);
}
return 0;
}
private:
int done (void);
int shutdown_;
};
// Listing 1
int Manager::done (void)
{
return (shutdown_ == 1);
}
int ACE_TMAIN (int, ACE_TCHAR *[])
{
Manager tp;
tp.activate ();
// Wait for a moment every time you send a message.
ACE_Time_Value tv;
tv.msec (100);
ACE_Message_Block *mb = 0;
for (int i = 0; i < 30; i++)
{
ACE_NEW_RETURN
(mb, ACE_Message_Block(sizeof(int)), -1);
ACE_OS::memcpy (mb->wr_ptr (), &i, sizeof(int));
ACE_OS::sleep (tv);
// Add a new work item.
tp.putq (mb);
}
ACE_Thread_Manager::instance ()->wait ();
return 0;
}
#else
#include "ace/OS_main.h"
#include "ace/OS_NS_stdio.h"
int ACE_TMAIN (int, ACE_TCHAR *[])
{
ACE_OS::puts (ACE_TEXT ("This example requires threads."));
return 0;
}
#endif /* ACE_HAS_THREADS */
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