source: source/ariba/utility/system/SystemQueue.h@ 2851

Last change on this file since 2851 was 2851, checked in by Christoph Mayer, 15 years ago

-friend def für arm gefixt

File size: 6.8 KB
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1// [Licence]
2// The Ariba-Underlay Copyright
3//
4// Copyright (c) 2008-2009, Institute of Telematics, UniversitÀt Karlsruhe (TH)
5//
6// Institute of Telematics
7// UniversitÀt Karlsruhe (TH)
8// Zirkel 2, 76128 Karlsruhe
9// Germany
10//
11// Redistribution and use in source and binary forms, with or without
12// modification, are permitted provided that the following conditions are
13// met:
14//
15// 1. Redistributions of source code must retain the above copyright
16// notice, this list of conditions and the following disclaimer.
17// 2. Redistributions in binary form must reproduce the above copyright
18// notice, this list of conditions and the following disclaimer in the
19// documentation and/or other materials provided with the distribution.
20//
21// THIS SOFTWARE IS PROVIDED BY THE INSTITUTE OF TELEMATICS ``AS IS'' AND
22// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ARIBA PROJECT OR
25// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
28// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32//
33// The views and conclusions contained in the software and documentation
34// are those of the authors and should not be interpreted as representing
35// official policies, either expressed or implied, of the Institute of
36// Telematics.
37// [Licence]
38
39#ifndef SYSTEMQUEUE_H_
40#define SYSTEMQUEUE_H_
41
42#include <vector>
43#include <cassert>
44#include "SystemEvent.h"
45#include "SystemEventListener.h"
46#include "ariba/utility/logging/Logging.h"
47#include <boost/date_time.hpp>
48#include <boost/cstdint.hpp>
49
50#ifdef UNDERLAY_OMNET
51 #include <csimplemodule.h>
52 #include <cmessage.h>
53 #include <macros.h>
54#else
55 #include <boost/thread/mutex.hpp>
56 #include <boost/thread/thread.hpp>
57 #include <boost/thread/condition_variable.hpp>
58 #include <boost/utility.hpp>
59 #include <boost/bind.hpp>
60#endif
61
62using std::vector;
63using boost::posix_time::ptime;
64
65namespace ariba {
66namespace utility {
67
68/**
69 * This class implements a simple system event queue to allow
70 * a simulation of cooperative multitasking. It also allows
71 * events to be scheduled from other tasks. This allows
72 * dispatching asynchronous tasks.
73 *
74 * @author Christoph Mayer, Sebastian Mies
75 */
76
77#ifndef UNDERLAY_OMNET
78class SystemQueue : private boost::noncopyable {
79#else
80class SystemQueue : public cSimpleModule {
81#endif
82 use_logging_h(SystemQueue);
83public:
84 /**
85 * Get the SystemQueue singleton instance.
86 */
87 static SystemQueue& instance() {
88 static SystemQueue _inst;
89 return _inst;
90 }
91
92#ifdef UNDERLAY_OMNET
93 /**
94 * Prevent deletion of this module
95 * by implementing the virtual method
96 * and doing nothing in it
97 */
98 virtual void deleteModule(){}
99#endif
100
101 /**
102 * This methods schedules a given event.
103 *
104 * @param The event to be scheduled
105 * @param The delay in milli-seconds
106 */
107 void scheduleEvent( const SystemEvent& event, uint32_t delay = 0 );
108
109 /**
110 * Starts the processing and waiting for events.
111 * Use <code>cancel()</code> to end system queue processing and
112 * <code>isEmpty()</code> to check wheter the queue is empty.
113 */
114 void run();
115
116 /**
117 * Cancels the system queue and ends the processing after the
118 * currently processed event is processed.
119 *
120 * This method is thread-safe.
121 */
122 void cancel();
123
124 /**
125 * Check wheter this queue has items or not.
126 *
127 * @return True, if this queue is empty.
128 */
129 bool isEmpty();
130
131 /**
132 * Is the system queue already started and running?
133 *
134 * @return True, if the system queue is running.
135 */
136 bool isRunning();
137
138protected:
139
140 /**
141 * Constructs a system queue.
142 */
143 SystemQueue();
144
145 /**
146 * Destroys the system queue. Beware that all events
147 * are canceled
148 */
149 ~SystemQueue();
150
151#ifdef UNDERLAY_OMNET
152 virtual void handleMessage( cMessage* msg );
153#endif
154
155private:
156
157#ifndef UNDERLAY_OMNET
158 typedef vector<SystemEvent> EventQueue;
159
160 //********************************************************
161
162 class QueueThread {
163 public:
164 QueueThread(QueueThread* _transferQueue = NULL);
165 virtual ~QueueThread();
166 void run();
167 void cancel();
168 bool isEmpty();
169 void insert( const SystemEvent& event, uint32_t delay );
170
171 protected:
172 virtual void onItemInserted( const SystemEvent& event ) = 0;
173 virtual void onNextQueueItem( const SystemEvent& event ) = 0;
174 QueueThread* transferQueue;
175 EventQueue eventsQueue;
176 boost::mutex queueMutex;
177 private:
178 boost::thread* queueThread;
179 static void threadFunc( QueueThread* obj );
180 boost::condition_variable itemsAvailable;
181 volatile bool running;
182 }; // class QueueThread
183
184 //********************************************************
185
186 class QueueThreadDirect : public QueueThread {
187 public:
188 QueueThreadDirect();
189 ~QueueThreadDirect();
190 protected:
191 virtual void onItemInserted( const SystemEvent& event );
192 virtual void onNextQueueItem( const SystemEvent& event );
193 }; // class QueueThreadDirect
194
195 //********************************************************
196
197 class QueueThreadDelay : public QueueThread {
198 public:
199 QueueThreadDelay(QueueThread* _transferQueue = NULL);
200 ~QueueThreadDelay();
201 protected:
202 virtual void onItemInserted( const SystemEvent& event );
203 virtual void onNextQueueItem( const SystemEvent& event );
204 private:
205 volatile bool isSleeping;
206 ptime sleepStart;
207 boost::mutex sleepMutex;
208 boost::condition_variable sleepCond;
209 }; // class QueueThreadDelay
210
211 //********************************************************
212
213 QueueThreadDirect directScheduler;
214 QueueThreadDelay delayScheduler;
215 volatile bool systemQueueRunning;
216#endif
217
218}; // class SystemQueue
219
220#ifdef UNDERLAY_OMNET
221
222 //
223 // the system queue must be a singleton in simulations, too.
224 // and to include it in the simulation the module is defined
225 // as submodule in every SpoVNet host. Therefore we hack the
226 // Define_Module (see omnet/includes/macros.h) the way we need
227 // it with our singleton ...
228 //
229 // this is the macro definition from macros.h
230 //
231 // #define Define_Module(CLASSNAME) \
232 // static cModule *CLASSNAME##__create() {return new CLASSNAME();} \
233 // EXECUTE_ON_STARTUP(CLASSNAME##__mod, modtypes.instance()->add(new cModuleType(#CLASSNAME,#CLASSNAME,(ModuleCreateFunc)CLASSNAME##__create));)
234 //
235 // and this is how we do it :)
236 //
237
238 static cModule* SystemQueue__create() {
239 return &SystemQueue::instance();
240 }
241
242 EXECUTE_ON_STARTUP(SystemQueue__mod, modtypes.instance()->add(new cModuleType("SystemQueue","SystemQueue",(ModuleCreateFunc)SystemQueue__create));)
243
244#endif
245
246}} // spovnet, common
247
248#endif /* SYSTEMQUEUE_H_ */
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