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
|
/*
This file is part of GNUnet
Copyright (C) 2008--2013 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
*/
/**
* @file testbed/testbed_api_operations.h
* @brief internal API to access the 'operations' subsystem
* @author Christian Grothoff
*/
#ifndef NEW_TESTING_API_OPERATIONS_H
#define NEW_TESTING_API_OPERATIONS_H
#include "gnunet_testbed_service.h"
#include "gnunet_helper_lib.h"
/**
* Queue of operations where we can only support a certain
* number of concurrent operations of a particular type.
*/
struct OperationQueue;
/**
* The type of operation queue
*/
enum OperationQueueType
{
/**
* Operation queue which permits a fixed maximum number of operations to be
* active at any time
*/
OPERATION_QUEUE_TYPE_FIXED,
/**
* Operation queue which adapts the number of operations to be active based on
* the operation completion times of previously executed operation in it
*/
OPERATION_QUEUE_TYPE_ADAPTIVE
};
/**
* Create an operation queue.
*
* @param type the type of operation queue
* @param max_active maximum number of operations in this queue that can be
* active in parallel at the same time.
* @return handle to the queue
*/
struct OperationQueue *
GNUNET_TESTBED_operation_queue_create_ (enum OperationQueueType type,
unsigned int max_active);
/**
* Destroy an operation queue. The queue MUST be empty
* at this time.
*
* @param queue queue to destroy
*/
void
GNUNET_TESTBED_operation_queue_destroy_ (struct OperationQueue *queue);
/**
* Destroys the operation queue if it is empty. If not empty return GNUNET_NO.
*
* @param queue the queue to destroy if empty
* @return GNUNET_YES if the queue is destroyed. GNUNET_NO if not (because it
* is not empty)
*/
int
GNUNET_TESTBED_operation_queue_destroy_empty_ (struct OperationQueue *queue);
/**
* Function to reset the maximum number of operations in the given queue. If
* max_active is lesser than the number of currently active operations, the
* active operations are not stopped immediately.
*
* @param queue the operation queue which has to be modified
* @param max_active the new maximum number of active operations
*/
void
GNUNET_TESTBED_operation_queue_reset_max_active_ (struct OperationQueue *queue,
unsigned int max_active);
/**
* Add an operation to a queue. An operation can be in multiple queues at
* once. Once the operation is inserted into all the queues
* GNUNET_TESTBED_operation_begin_wait_() has to be called to actually start
* waiting for the operation to become active.
*
* @param queue queue to add the operation to
* @param op operation to add to the queue
* @param nres the number of units of the resources of queue needed by the
* operation. Should be greater than 0.
*/
void
GNUNET_TESTBED_operation_queue_insert2_ (struct OperationQueue *queue,
struct GNUNET_TESTBED_Operation *op,
unsigned int nres);
/**
* Add an operation to a queue. An operation can be in multiple queues at
* once. Once the operation is inserted into all the queues
* GNUNET_TESTBED_operation_begin_wait_() has to be called to actually start
* waiting for the operation to become active.
*
* @param queue queue to add the operation to
* @param op operation to add to the queue
*/
void
GNUNET_TESTBED_operation_queue_insert_ (struct OperationQueue *queue,
struct GNUNET_TESTBED_Operation *op);
/**
* Marks the given operation as waiting on the queues. Once all queues permit
* the operation to become active, the operation will be activated. The actual
* activation will occur in a separate task (thus allowing multiple queue
* insertions to be made without having the first one instantly trigger the
* operation if the first queue has sufficient resources).
*
* @param op the operation to marks as waiting
*/
void
GNUNET_TESTBED_operation_begin_wait_ (struct GNUNET_TESTBED_Operation *op);
/**
* Function to call to start an operation once all
* queues the operation is part of declare that the
* operation can be activated.
*
* @param cls the closure from GNUNET_TESTBED_operation_create_()
*/
typedef void (*OperationStart) (void *cls);
/**
* Function to call to cancel an operation (release all associated
* resources). This can be because of a call to
* "GNUNET_TESTBED_operation_cancel" (before the operation generated
* an event) or AFTER the operation generated an event due to a call
* to "GNUNET_TESTBED_operation_done". Thus it is not guaranteed that
* a callback to the 'OperationStart' preceeds the call to
* 'OperationRelease'. Implementations of this function are expected
* to clean up whatever state is in 'cls' and release all resources
* associated with the operation.
*
* @param cls the closure from GNUNET_TESTBED_operation_create_()
*/
typedef void (*OperationRelease) (void *cls);
/**
* Create an 'operation' to be performed.
*
* @param cls closure for the callbacks
* @param start function to call to start the operation
* @param release function to call to close down the operation
* @return handle to the operation
*/
struct GNUNET_TESTBED_Operation *
GNUNET_TESTBED_operation_create_ (void *cls, OperationStart start,
OperationRelease release);
/**
* An operation is 'done' (was cancelled or finished); remove
* it from the queues and release associated resources.
*
* @param op operation that finished
*/
void
GNUNET_TESTBED_operation_release_ (struct GNUNET_TESTBED_Operation *op);
/**
* Marks an active operation as inactive - the operation will be kept in a
* ready-to-be-released state and continues to hold resources until another
* operation contents for them.
*
* @param op the operation to be marked as inactive. The operation start
* callback should have been called before for this operation to mark
* it as inactive.
*/
void
GNUNET_TESTBED_operation_inactivate_ (struct GNUNET_TESTBED_Operation *op);
/**
* Marks and inactive operation as active. This fuction should be called to
* ensure that the oprelease callback will not be called until it is either
* marked as inactive or released.
*
* @param op the operation to be marked as active
*/
void
GNUNET_TESTBED_operation_activate_ (struct GNUNET_TESTBED_Operation *op);
/**
* Marks an operation as failed
*
* @param op the operation to be marked as failed
*/
void
GNUNET_TESTBED_operation_mark_failed (struct GNUNET_TESTBED_Operation *op);
#endif
/* end of testbed_api_operations.h */
|
