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// $Id$
#ifndef PROTOCOL_TASK_H
#define PROTOCOL_TASK_H
#include "ace/Task.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
/* A typical ACE_Task<> derivative that adds a few things appropriate
to protocol stacks.
*/
class Protocol_Task : public ACE_Task<ACE_MT_SYNCH>
{
public:
typedef ACE_Task<ACE_MT_SYNCH> inherited;
// A choice of concurrency strategies is offered by the constructor.
// In most cases it makes sense to set this to zero and let things
// proceed serially. You might have a need, however, for some of
// your tasks to have their own thread.
Protocol_Task (int thr_count);
~Protocol_Task (void);
// open() is invoked when the task is inserted into the stream.
virtual int open (void *arg);
// close() is invoked when the stream is closed (flags will be set
// to '1') and when the svc() method exits (flags will be '0').
virtual int close (u_long flags);
// As data travels through the stream, the put() method of each task
// is invoked to keep the data moving along.
virtual int put (ACE_Message_Block *message,
ACE_Time_Value *timeout);
// If you choose to activate the task then this method will be doing
// all of the work.
virtual int svc (void);
protected:
// Called by put() or svc() as necessary to process a block of data.
int process (ACE_Message_Block *message,
ACE_Time_Value *timeout);
// Just let us know if we're active or not.
int is_active (void)
{
return this->thr_count () != 0;
}
// Tasks on the writter (downstream) side of the stream are called
// upon to send() data that will ultimately go to the peer.
virtual int send (ACE_Message_Block *message,
ACE_Time_Value *timeout);
// Tasks on the reader (upstream) side will be receiving data that
// came from the peer.
virtual int recv (ACE_Message_Block *message,
ACE_Time_Value *timeout);
private:
int desired_thr_count_;
};
#endif /* PROTOCOL_TASK_H */
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