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
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
// -*- C++ -*-
//=============================================================================
/**
* @file TP_Reactor.h
*
* Deadlock_Free_TP_Reactor.h,v 4.42 2004/08/20 15:21:02 bala Exp
*
* The <ACE_TP_Reactor> (aka, Thread Pool Reactor) uses the
* Leader/Followers pattern to demultiplex events among a pool of
* threads. When using a thread pool reactor, an application
* pre-spawns a _fixed_ number of threads. When these threads
* invoke the <ACE_TP_Reactor>'s <handle_events> method, one thread
* will become the leader and wait for an event. The other
* follower threads will queue up waiting for their turn to become
* the leader. When an event occurs, the leader will pick a
* follower to become the leader and go on to handle the event.
* The consequence of using <ACE_TP_Reactor> is the amortization of
* the costs used to creating threads. The context switching cost
* will also reduce. More over, the total resources used by
* threads are bounded because there are a fixed number of threads.
*
*
* @author Irfan Pyarali <irfan@cs.wustl.edu>
* @author Nanbor Wang <nanbor@cs.wustl.edu>
* @author Paul Oberlin <pauloberlin@gmail.com>
*/
//=============================================================================
#ifndef ACE_DEADLOCK_FREE_TP_REACTOR_H
#define ACE_DEADLOCK_FREE_TP_REACTOR_H
#include /**/ "ace/pre.h"
#include "ace/TP_Reactor.h"
#include "ace/DA_Strategy_Base.h"
#include "ace/Event_Handler.h"
#include "ace/Hash_Map_Manager.h"
#include "ace/Mutex.h"
#include "ace/Singleton.h"
#include "ace/OS.h"
#include "ace/OS_NS_Thread.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
typedef ACE_Hash_Map_Entry<ACE_Event_Handler *, int> HASH_EH_ENTRY;
typedef ACE_Hash_Map_Manager_Ex<void *,
int,
ACE_Hash<void *>,
ACE_Equal_To<void *>,
ACE_Thread_Mutex> HASH_ANNOTATIONS_MAP;
typedef ACE_Hash_Map_Iterator_Ex<void *,
int,
ACE_Hash<void *>,
ACE_Equal_To<void *>,
ACE_Thread_Mutex> HASH_ANNOTATIONS_ITER;
typedef ACE_Hash_Map_Const_Iterator_Ex<void *,
int,
ACE_Hash<void *>,
ACE_Equal_To<void *>,
ACE_Thread_Mutex> HASH_ANNOTATIONS_CONST_ITER;
typedef ACE_Hash_Map_Reverse_Iterator_Ex<void *,
int,
ACE_Hash<void *>,
ACE_Equal_To<void *>,
ACE_Thread_Mutex> HASH_ANNOTATIONS_REVERSE_ITER;
typedef HASH_ANNOTATIONS_MAP Deadlock_Free_TPR_Annotations_Table;
class ACE_Deadlock_Free_TP_Reactor_Impl: public ACE_TP_Reactor
{
friend class ACE_Singleton<ACE_Deadlock_Free_TP_Reactor_Impl, ACE_Recursive_Thread_Mutex>;
public:
/*
ACE_Deadlock_Free_TP_Reactor (ACE_Sig_Handler * = 0,
ACE_Timer_Queue * = 0,
int mask_signals = 1,
int s_queue = ACE_Select_Reactor_Token::FIFO);
*/
//this static method is use to "prime the pump" before the first time
//the singleton instance is called.
//da_strategy cannot be null. The reactor will delete it during
//its destructor
static void initialize(size_t max_number_of_handles,
DA_Strategy_Base<ACE_HANDLE>* da_strategy,
int restart = 0,
ACE_Sig_Handler * = 0,
ACE_Timer_Queue * = 0,
int mask_signals = 1,
int s_queue = ACE_Select_Reactor_Token::FIFO);
virtual int filter_deadlock_potential_handles (ACE_HANDLE upcall_handle);
virtual void pre_upcall_hook (ACE_HANDLE upcall_handle);
virtual void post_upcall_hook (ACE_HANDLE upcall_handle);
virtual int get_annotation (ACE_Event_Handler* eh);
virtual int add_annotation (ACE_Event_Handler* eh, int annotation);
virtual int remove_annotation (ACE_Event_Handler* eh);
private:
ACE_Deadlock_Free_TP_Reactor_Impl();
virtual ~ACE_Deadlock_Free_TP_Reactor_Impl();
ACE_RW_Thread_Mutex lock_;
DA_Strategy_Base<ACE_HANDLE>* da_strategy_;
};
typedef ACE_Singleton<ACE_Deadlock_Free_TP_Reactor_Impl, ACE_Recursive_Thread_Mutex> ACE_Deadlock_Free_TP_Reactor;
#if defined (__ACE_INLINE__)
#include "ace/Deadlock_Free_TP_Reactor.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* ACE_DEADLOCK_FREE_TP_REACTOR_H */
|
