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source: source/ariba/utility/system/SystemQueue.cpp@ 3055

Last change on this file since 3055 was 2850, checked in by Christoph Mayer, 16 years ago

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File size: 8.5 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
38#include "SystemQueue.h"
39
40namespace ariba {
41namespace utility {
42
43use_logging_cpp(SystemQueue);
44
45SystemQueue::SystemQueue()
46#ifndef UNDERLAY_OMNET
47 : delayScheduler( &directScheduler ), systemQueueRunning( false )
48#endif
49{
50}
51
52SystemQueue::~SystemQueue() {
53}
54
55void SystemQueue::scheduleEvent( const SystemEvent& event, uint32_t delay ) {
56#ifndef UNDERLAY_OMNET
57 if( delay == 0 ) directScheduler.insert( event, delay );
58 else delayScheduler.insert ( event, delay );
59#else
60 Enter_Method_Silent();
61 cMessage* msg = new cMessage();
62 msg->setContextPointer( new SystemEvent(event) );
63
64 if( delay == 0 )
65 cSimpleModule::scheduleAt( cSimpleModule::simTime(), msg );
66 else
67 cSimpleModule::scheduleAt( cSimpleModule::simTime()+((double)delay/1000.0), msg );
68#endif
69}
70
71#ifdef UNDERLAY_OMNET
72void SystemQueue::handleMessage(cMessage* msg){
73 SystemEvent* event = (SystemEvent*)msg->contextPointer();
74
75 event->listener->handleSystemEvent( *event );
76
77 delete event; delete msg;
78}
79#endif
80
81void SystemQueue::run() {
82#ifndef UNDERLAY_OMNET
83 systemQueueRunning = true;
84 directScheduler.run();
85 delayScheduler.run();
86#endif
87}
88
89void SystemQueue::cancel() {
90#ifndef UNDERLAY_OMNET
91 systemQueueRunning = false;
92 directScheduler.cancel();
93 delayScheduler.cancel();
94#endif
95}
96
97bool SystemQueue::isEmpty() {
98#ifndef UNDERLAY_OMNET
99 return directScheduler.isEmpty() || delayScheduler.isEmpty();
100#else
101 return false;
102#endif
103}
104
105bool SystemQueue::isRunning() {
106#ifndef UNDERLAY_OMNET
107 return systemQueueRunning;
108#else
109 return true;
110#endif
111}
112
113//***************************************************************
114#ifndef UNDERLAY_OMNET
115
116SystemQueue::QueueThread::QueueThread(QueueThread* _transferQueue)
117 : running( false ), transferQueue( _transferQueue ) {
118}
119
120SystemQueue::QueueThread::~QueueThread(){
121}
122
123void SystemQueue::QueueThread::run(){
124 running = true;
125 queueThread = new boost::thread(
126 boost::bind(&QueueThread::threadFunc, this) );
127}
128
129void SystemQueue::QueueThread::cancel(){
130
131 // cause the thread to exit
132 running = false;
133 itemsAvailable.notify_all();
134
135 // wait that the thread has exited
136 // and delete it, so that a subsuquent run() can be called
137
138 queueThread->join();
139 delete queueThread;
140 queueThread = NULL;
141
142 while( eventsQueue.size() > 0 ){
143 eventsQueue.erase( eventsQueue.begin() );
144 }
145}
146
147bool SystemQueue::QueueThread::isEmpty(){
148 boost::mutex::scoped_lock lock( queueMutex );
149 return eventsQueue.empty();
150}
151
152void SystemQueue::QueueThread::insert( const SystemEvent& event, uint32_t delay ){
153 {
154 boost::mutex::scoped_lock lock( queueMutex );
155
156 eventsQueue.push_back( event );
157 eventsQueue.back().scheduledTime = boost::posix_time::microsec_clock::local_time();
158 eventsQueue.back().delayTime = delay;
159 eventsQueue.back().remainingDelay = delay;
160
161 onItemInserted( event );
162 itemsAvailable.notify_all();
163 }
164}
165
166void SystemQueue::QueueThread::threadFunc( QueueThread* obj ) {
167
168 boost::mutex::scoped_lock lock( obj->queueMutex );
169
170 while( obj->running ) {
171
172 // wait until an item is in the queue or we are notified
173 // to quit the thread. in case the thread is about to
174 // quit, the queueThreadRunning variable will indicate
175 // this and cause the thread to exit
176
177 while ( obj->eventsQueue.empty() && obj->running ){
178
179 const boost::system_time duration =
180 boost::get_system_time() +
181 boost::posix_time::milliseconds(40);
182
183 obj->itemsAvailable.wait( lock );
184// obj->itemsAvailable.timed_wait( lock, duration );
185 }
186
187 // work all the items that are currently in the queue
188
189 while( !obj->eventsQueue.empty() ) {
190
191 // fetch the first item in the queue and deliver it to the
192 // queue handler
193 SystemEvent ev = obj->eventsQueue.front();
194 obj->eventsQueue.erase( obj->eventsQueue.begin() );
195
196 {
197 // unlock the queue to that an event handler
198 // can insert new items into the queue
199// obj->queueMutex.unlock();
200 obj->onNextQueueItem( ev );
201// obj->queueMutex.lock();
202 }
203
204 } // !obj->eventsQueue.empty() )
205 } // while (obj->running)
206}
207
208//***************************************************************
209
210SystemQueue::QueueThreadDirect::QueueThreadDirect(){
211}
212
213SystemQueue::QueueThreadDirect::~QueueThreadDirect(){
214}
215
216void SystemQueue::QueueThreadDirect::onItemInserted( const SystemEvent& event ){
217 // do nothing here
218}
219
220void SystemQueue::QueueThreadDirect::onNextQueueItem( const SystemEvent& event ){
221 // directly deliver the item to the
222 event.getListener()->handleSystemEvent( event );
223}
224
225//***************************************************************
226
227SystemQueue::QueueThreadDelay::QueueThreadDelay(QueueThread* _transferQueue)
228 : QueueThread( _transferQueue ), isSleeping( false ) {
229
230 assert( _transferQueue != NULL );
231}
232
233SystemQueue::QueueThreadDelay::~QueueThreadDelay(){
234}
235
236void SystemQueue::QueueThreadDelay::onItemInserted( const SystemEvent& event ){
237
238 if( !isSleeping) return;
239
240 // break an existing sleep and
241 // remember the time that was actually slept for
242 // and change it for every event in the queue
243
244 assert( !eventsQueue.empty());
245 sleepCond.notify_all();
246
247 ptime sleepEnd = boost::posix_time::microsec_clock::local_time();
248 boost::posix_time::time_duration duration = sleepEnd - sleepStart;
249 uint32_t sleptTime = duration.total_milliseconds();
250
251 EventQueue::iterator i = eventsQueue.begin();
252 EventQueue::iterator iend = eventsQueue.end();
253
254 for( ; i != iend; i++ ) {
255
256 if( sleptTime >= i->remainingDelay)
257 i->remainingDelay = 0;
258 else
259 i->remainingDelay -= sleptTime;
260
261 } // for( ; i != iend; i++ )
262
263 // now we have to reorder the events
264 // in the queue with respect to their remaining delay
265 // the SystemQueue::operator< takes care of the
266 // ordering with respect to the remaining delay
267
268 std::sort( eventsQueue.begin(), eventsQueue.end() );
269
270}
271
272void SystemQueue::QueueThreadDelay::onNextQueueItem( const SystemEvent& event ){
273
274 // sleeps will be cancelled in the
275 // onItemInserted function when a new
276 // event arrives during sleeping
277
278 assert( !isSleeping );
279
280 // the given item is the one with the least
281 // amount of sleep time left. because all
282 // items are reordered in onItemInserted
283
284 if( event.remainingDelay > 0 ) {
285
286 const boost::system_time duration =
287 boost::get_system_time() +
288 boost::posix_time::milliseconds(event.remainingDelay);
289
290 {
291 boost::unique_lock<boost::mutex> lock( sleepMutex );
292
293 sleepStart = boost::posix_time::microsec_clock::local_time();
294 isSleeping = true;
295
296 sleepCond.timed_wait( lock, duration );
297
298 isSleeping = false;
299 }
300
301 } // if( event.remainingDelay > 0 )
302
303 // if the sleep succeeded and was not
304 // interrupted by a new incoming item
305 // we can now deliver this event
306
307 ptime sleepEnd = boost::posix_time::microsec_clock::local_time();
308 boost::posix_time::time_duration duration = sleepEnd - sleepStart;
309 uint32_t sleptTime = duration.total_milliseconds();
310
311 if (event.remainingDelay <= sleptTime)
312 transferQueue->insert( event, 0 );
313}
314
315#endif // #ifndef UNDERLAY_OMNET
316
317//***************************************************************
318
319}} // spovnet, common
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