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/* -*- C++ -*- */
/**
* @file Dispatcher_Task.h
*
* @author Venkita Subramonian (venkita@cs.wustl.edu)
*
* Based on previous work by Tim Harrison (harrison@cs.wustl.edu),
* Chris Gill, Carlos O'Ryan and other members of the DOC group.
*/
#ifndef DISPATCHER_TASK_H
#define DISPATCHER_TASK_H
#include /**/ "ace/pre.h"
#include "ace/Task.h"
#include "ace/Lock_Adapter_T.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "Kokyu_defs.h"
namespace Kokyu
{
class Dispatch_Queue_Item : public ACE_Message_Block
{
public:
Dispatch_Queue_Item (
const Dispatch_Command* cmd,
const QoSDescriptor& qos_info,
ACE_Allocator* mb_allocator =0);
Dispatch_Queue_Item (
const Dispatch_Command* cmd,
const QoSDescriptor& qos_info,
ACE_Data_Block* data_block,
int flags,
ACE_Allocator* mb_allocator =0);
Dispatch_Command* command ();
private:
void init_i(const QoSDescriptor&);
private:
const Dispatch_Command* command_;
QoSDescriptor qos_info_;
};
/**
* @class Dispatcher_Task
*
* @brief Implement the dispatching queues for FIFO and Priority
* dispatching.
*/
class Dispatcher_Task : public ACE_Task<ACE_SYNCH>
{
public:
/// Constructor
Dispatcher_Task (const ConfigInfo& config_info,
ACE_Thread_Manager* thr_manager = 0);
~Dispatcher_Task ();
int initialize();
int enqueue (const Dispatch_Command* cmd,
const QoSDescriptor& qos_info);
/// Process the events in the queue.
int svc (void);
const ConfigInfo& get_curr_config_info() const;
Priority_t preemption_priority() const;
private:
static int get_native_prio();
private:
ConfigInfo curr_config_info_;
ACE_Allocator *allocator_;
int own_allocator_;
/// Helper data structure to minimize memory allocations...
ACE_Locked_Data_Block<ACE_Lock_Adapter<ACE_SYNCH_MUTEX> > data_block_;
/// The queue
ACE_Message_Queue<ACE_SYNCH>* the_queue_;
ACE_Deadline_Message_Strategy deadline_msg_strategy_;
ACE_Laxity_Message_Strategy laxity_msg_strategy_;
};
} //end of namespace
#if defined (__ACE_INLINE__)
#include "Dispatcher_Task.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* DISPATCHER_TASK_H */
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