blob: 717fad35865c48347b8fd3d6fbfb65b1693b65e9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
/* -*- C++ -*- */
/**
* @file EC_Priority_Dispatching.h
*
* $Id$
*
* @author Carlos O'Ryan (coryan@cs.wustl.edu)
*
* Based on previous work by Tim Harrison (harrison@cs.wustl.edu) and
* other members of the DOC group. More details can be found in:
*
* http://doc.ece.uci.edu/~coryan/EC/index.html
*/
#ifndef TAO_EC_PRIORITY_DISPATCHING_H
#define TAO_EC_PRIORITY_DISPATCHING_H
#include /**/ "ace/pre.h"
#include "EC_Dispatching.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "orbsvcs/RtecSchedulerC.h"
#include "sched_event_export.h"
#include "ace/Thread_Manager.h"
class TAO_EC_Dispatching_Task;
class TAO_EC_Event_Channel_Base;
/**
* @class TAO_EC_Priority_Dispatching
*
* @brief Dispatching strategy that minimizes priority inversion.
*
* This strategy uses multiple queues, each serviced by a thread
* at different priority. This minimizes priority inversion
* because the consumers at higher priority are serviced before
* consumers at lower priority.
* It is more flexible than using the supplier thread to dispatch
* because it allows high-priority suppliers to push events to
* low-priority consumers (and vice-versa).
* It also isolates the supplier threads from the time spent on
* upcalls to the consumer objects, making the system easier to
* analyze and schedule.
*/
class TAO_RTSchedEvent_Export TAO_EC_Priority_Dispatching : public TAO_EC_Dispatching
{
public:
/// The scheduler is used to find the range of priorities and similar
/// info.
TAO_EC_Priority_Dispatching (TAO_EC_Event_Channel_Base* ec);
// = The EC_Dispatching methods.
virtual void activate (void);
virtual void shutdown (void);
virtual void push (TAO_EC_ProxyPushSupplier* proxy,
RtecEventComm::PushConsumer_ptr consumer,
const RtecEventComm::EventSet& event,
TAO_EC_QOS_Info& qos_info
ACE_ENV_ARG_DECL);
virtual void push_nocopy (TAO_EC_ProxyPushSupplier* proxy,
RtecEventComm::PushConsumer_ptr consumer,
RtecEventComm::EventSet& event,
TAO_EC_QOS_Info& qos_info
ACE_ENV_ARG_DECL);
private:
/// Use our own thread manager.
ACE_Thread_Manager thread_manager_;
/// The number of active tasks
int ntasks_;
/// The tasks..
TAO_EC_Dispatching_Task** tasks_;
/// The scheduler
RtecScheduler::Scheduler_var scheduler_;
};
#if defined (__ACE_INLINE__)
#include "EC_Priority_Dispatching.i"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* TAO_EC_PRIORITY_DISPATCHING_H */
|
