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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
/* -*- C++ -*- */
// $Id$
// ============================================================================
//
// = LIBRARY
// ace
//
// = FILENAME
// WIN_Proactor.h
//
// = AUTHOR
// Irfan Pyarali (irfan@cs.wustl.edu),
// Tim Harrison (harrison@cs.wustl.edu) and
// Alexander Babu Arulanthu <alex@cs.wustl.edu>
//
// ============================================================================
#ifndef ACE_WIN32_PROACTOR_H
#define ACE_WIN32_PROACTOR_H
#include "ace/pre.h"
#include "ace/OS.h"
#include "ace/WIN32_Asynch_IO.h"
#include "ace/Event_Handler.h"
#if (defined (ACE_WIN32) && !defined (ACE_HAS_WINCE))
// WIN32 implementation of the Proactor.
#include "ace/Proactor_Impl.h"
// Forward declarations.
class ACE_WIN32_Asynch_Result;
class ACE_WIN32_Proactor_Timer_Handler;
class ACE_Export ACE_WIN32_Proactor : public ACE_Proactor_Impl
{
// = TITLE
// A manager for asynchronous event demultiplexing.
//
// = DESCRIPTION
// See the Proactor pattern description at
// http://www.cs.wustl.edu/~schmidt/proactor.ps.gz for more
// details.
public:
ACE_WIN32_Proactor (size_t number_of_threads = 0,
int used_with_reactor_event_loop = 0);
// A do nothing constructor.
virtual ~ACE_WIN32_Proactor (void);
// Virtual destruction.
virtual int close (void);
// Close the IO completion port.
virtual int register_handle (ACE_HANDLE handle,
const void *completion_key);
// This method adds the <handle> to the I/O completion port. This
// function is a no-op function for Unix systems.
virtual int handle_events (ACE_Time_Value &wait_time);
// Dispatch a single set of events. If <wait_time> elapses before
// any events occur, return 0. Return 1 on success i.e., when a
// completion is dispatched, non-zero (-1) on errors and errno is
// set accordingly.
virtual int handle_events (void);
// Block indefinitely until at least one event is dispatched.
// Dispatch a single set of events. If <wait_time> elapses before
// any events occur, return 0. Return 1 on success i.e., when a
// completion is dispatched, non-zero (-1) on errors and errno is
// set accordingly.
virtual int post_completion (ACE_WIN32_Asynch_Result *result);
// Post a result to the completion port of the Proactor. If errors
// occur, the result will be deleted by this method. If successful,
// the result will be deleted by the Proactor when the result is
// removed from the completion port. Therefore, the result should
// have been dynamically allocated and should be orphaned by the
// user once this method is called.
int wake_up_dispatch_threads (void);
// Add wakeup dispatch threads (reinit).
int close_dispatch_threads (int wait);
// Close all dispatch threads.
size_t number_of_threads (void) const;
void number_of_threads (size_t threads);
// Number of thread used as a parameter to CreatIoCompletionPort.
virtual ACE_HANDLE get_handle (void) const;
// Get the event handle.
virtual ACE_Asynch_Read_Stream_Impl *create_asynch_read_stream (void);
virtual ACE_Asynch_Write_Stream_Impl *create_asynch_write_stream (void);
virtual ACE_Asynch_Read_File_Impl *create_asynch_read_file (void);
virtual ACE_Asynch_Write_File_Impl *create_asynch_write_file (void);
virtual ACE_Asynch_Accept_Impl *create_asynch_accept (void);
virtual ACE_Asynch_Transmit_File_Impl *create_asynch_transmit_file (void);
// Methods used to create Asynch_IO_Result objects. We create the right
// objects here in these methods.
virtual ACE_Asynch_Read_Stream_Result_Impl *create_asynch_read_stream_result (ACE_Handler &handler,
ACE_HANDLE handle,
ACE_Message_Block &message_block,
u_long bytes_to_read,
const void* act,
ACE_HANDLE event,
int priority,
int signal_number = 0);
virtual ACE_Asynch_Write_Stream_Result_Impl *create_asynch_write_stream_result (ACE_Handler &handler,
ACE_HANDLE handle,
ACE_Message_Block &message_block,
u_long bytes_to_write,
const void* act,
ACE_HANDLE event,
int priority,
int signal_number = 0);
virtual ACE_Asynch_Read_File_Result_Impl *create_asynch_read_file_result (ACE_Handler &handler,
ACE_HANDLE handle,
ACE_Message_Block &message_block,
u_long bytes_to_read,
const void* act,
u_long offset,
u_long offset_high,
ACE_HANDLE event,
int priority,
int signal_number = 0);
virtual ACE_Asynch_Write_File_Result_Impl *create_asynch_write_file_result (ACE_Handler &handler,
ACE_HANDLE handle,
ACE_Message_Block &message_block,
u_long bytes_to_write,
const void* act,
u_long offset,
u_long offset_high,
ACE_HANDLE event,
int priority,
int signal_number = 0);
virtual ACE_Asynch_Accept_Result_Impl *create_asynch_accept_result (ACE_Handler &handler,
ACE_HANDLE listen_handle,
ACE_HANDLE accept_handle,
ACE_Message_Block &message_block,
u_long bytes_to_read,
const void* act,
ACE_HANDLE event,
int priority,
int signal_number = 0);
virtual ACE_Asynch_Transmit_File_Result_Impl *create_asynch_transmit_file_result (ACE_Handler &handler,
ACE_HANDLE socket,
ACE_HANDLE file,
ACE_Asynch_Transmit_File::Header_And_Trailer *header_and_trailer,
u_long bytes_to_write,
u_long offset,
u_long offset_high,
u_long bytes_per_send,
u_long flags,
const void *act,
ACE_HANDLE event,
int priority,
int signal_number = 0);
virtual ACE_Asynch_Result_Impl *create_asynch_timer (ACE_Handler &handler,
const void *act,
const ACE_Time_Value &tv,
ACE_HANDLE event,
int priority,
int signal_number = 0);
// Create a timer result object which can be used with the Timer
// mechanism of the Proactor.
protected:
virtual int handle_signal (int signum, siginfo_t * = 0, ucontext_t * = 0);
// Called when object is signaled by OS (either via UNIX signals or
// when a Win32 object becomes signaled).
virtual int handle_close (ACE_HANDLE handle,
ACE_Reactor_Mask close_mask);
// Called when object is removed from the ACE_Reactor.
virtual int handle_events (unsigned long milli_seconds);
// Dispatch a single set of events. If <milli_seconds> elapses
// before any events occur, return 0. Return 1 if a completion is
// dispatched. Return -1 on errors.
void application_specific_code (ACE_WIN32_Asynch_Result *asynch_result,
u_long bytes_transferred,
int success,
const void *completion_key,
u_long error);
// Protect against structured exceptions caused by user code when
// dispatching handles.
virtual int post_wakeup_completions (int how_many);
// Post <how_many> completions to the completion port so that all
// threads can wake up. This is used in conjunction with the
// <run_event_loop>.
ACE_HANDLE completion_port_;
// Handle for the completion port. Unix doesnt have completion
// ports.
size_t number_of_threads_;
// This number is passed to the <CreatIOCompletionPort> system
// call.
ACE_Auto_Event event_;
// This event is used in conjunction with Reactor when we try to
// integrate the event loops of Reactor and the Proactor.
int used_with_reactor_event_loop_;
// Flag that indicates whether we are used in conjunction with
// Reactor.
ACE_Handler wakeup_handler_;
// Handler to handle the wakeups. This works in conjunction with the
// <ACE_Proactor::run_event_loop>.
};
class ACE_Export ACE_WIN32_Asynch_Timer : public ACE_WIN32_Asynch_Result
{
// = TITLE
// This class is posted to the completion port when a timer
// expires. When the complete method of this object is
// called, the <handler>'s handle_timeout method will be
// called.
friend class ACE_WIN32_Proactor;
// The factory method for this class is with the POSIX_Proactor
// class.
protected:
ACE_WIN32_Asynch_Timer (ACE_Handler &handler,
const void *act,
const ACE_Time_Value &tv,
ACE_HANDLE event = ACE_INVALID_HANDLE,
int priority = 0,
int signal_number = 0);
// Constructor.
virtual void complete (u_long bytes_transferred,
int success,
const void *completion_key,
u_long error = 0);
// This method calls the <handler>'s handle_timeout method.
ACE_Time_Value time_;
// Time value requested by caller
};
#endif /* ACE_WIN32 */
#include "ace/post.h"
#endif /* ACE_PROACTOR_H */
|
