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qfuturewatcher.cpp

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38 ****************************************************************************/ -

39 -

40 #include "qfuturewatcher.h" -

41 -

42 #ifndef QT_NO_QFUTURE -

43 -

44 #include "qfuturewatcher_p.h" -

45 -

46 #include <QtCore/qcoreevent.h> -

47 #include <QtCore/qcoreapplication.h> -

48 #include <QtCore/qmetaobject.h> -

49 #include <QtCore/qthread.h> -

50 -

51 QT_BEGIN_NAMESPACE -

52 -

53 /*! \class QFutureWatcher -

54 \reentrant -

55 \since 4.4 -

56 -

57 \inmodule QtCore -

58 \ingroup thread -

59 -

60 \brief The QFutureWatcher class allows monitoring a QFuture using signals -

61 and slots. -

62 -

63 QFutureWatcher provides information and notifications about a QFuture. Use -

64 the setFuture() function to start watching a particular QFuture. The -

65 future() function returns the future set with setFuture(). -

66 -

67 For convenience, several of QFuture's functions are also available in -

68 QFutureWatcher: progressValue(), progressMinimum(), progressMaximum(), -

69 progressText(), isStarted(), isFinished(), isRunning(), isCanceled(), -

70 isPaused(), waitForFinished(), result(), and resultAt(). The cancel(), -

71 setPaused(), pause(), resume(), and togglePaused() functions are slots in -

72 QFutureWatcher. -

73 -

74 Status changes are reported via the started(), finished(), canceled(), -

75 paused(), resumed(), resultReadyAt(), and resultsReadyAt() signals. -

76 Progress information is provided from the progressRangeChanged(), -

77 void progressValueChanged(), and progressTextChanged() signals. -

78 -

79 Throttling control is provided by the setPendingResultsLimit() function. -

80 When the number of pending resultReadyAt() or resultsReadyAt() signals -

81 exceeds the limit, the computation represented by the future will be -

82 throttled automatically. The computation will resume once the number of -

83 pending signals drops below the limit. -

84 -

85 Example: Starting a computation and getting a slot callback when it's -

86 finished: -

87 -

88 \snippet code/src_corelib_thread_qfuturewatcher.cpp 0 -

89 -

90 Be aware that not all asynchronous computations can be canceled or paused. -

91 For example, the future returned by QtConcurrent::run() cannot be -

92 canceled; but the future returned by QtConcurrent::mappedReduced() can. -

93 -

94 QFutureWatcher<void> is specialized to not contain any of the result -

95 fetching functions. Any QFuture<T> can be watched by a -

96 QFutureWatcher<void> as well. This is useful if only status or progress -

97 information is needed; not the actual result data. -

98 -

99 \sa QFuture, {Qt Concurrent} -

100 */ -

101 -

102 /*! \fn QFutureWatcher::QFutureWatcher(QObject *parent) -

103 -

104 Constructs a new QFutureWatcher with the given \a parent. -

105 */ -

106 QFutureWatcherBase::QFutureWatcherBase(QObject *parent) -

107 :QObject(*new QFutureWatcherBasePrivate, parent) -

108

{

executed 23 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

}

executed 23 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

109 -

110 /*! \fn QFutureWatcher::~QFutureWatcher() -

111 -

112 Destroys the QFutureWatcher. -

113 */ -

114 -

115 /*! \fn void QFutureWatcher::cancel() -

116 -

117 Cancels the asynchronous computation represented by the future(). Note that -

118 the cancelation is asynchronous. Use waitForFinished() after calling -

119 cancel() when you need synchronous cancelation. -

120 -

121 Currently available results may still be accessed on a canceled QFuture, -

122 but new results will \e not become available after calling this function. -

123 Also, this QFutureWatcher will not deliver progress and result ready -

124 signals once canceled. This includes the progressValueChanged(), -

125 progressRangeChanged(), progressTextChanged(), resultReadyAt(), and -

126 resultsReadyAt() signals. -

127 -

128 Be aware that not all asynchronous computations can be canceled. For -

129 example, the QFuture returned by QtConcurrent::run() cannot be canceled; -

130 but the QFuture returned by QtConcurrent::mappedReduced() can. -

131 */ -

132 void QFutureWatcherBase::cancel() -

133 { -

134 futureInterface().cancel(); -

135

}

executed 5 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

136 -

137 /*! \fn void QFutureWatcher::setPaused(bool paused) -

138 -

139 If \a paused is true, this function pauses the asynchronous computation -

140 represented by the future(). If the computation is already paused, this -

141 function does nothing. This QFutureWatcher will stop delivering progress -

142 and result ready signals while the future is paused. Signal delivery will -

143 continue once the computation is resumed. -

144 -

145 If \a paused is false, this function resumes the asynchronous computation. -

146 If the computation was not previously paused, this function does nothing. -

147 -

148 Be aware that not all computations can be paused. For example, the -

149 QFuture returned by QtConcurrent::run() cannot be paused; but the QFuture -

150 returned by QtConcurrent::mappedReduced() can. -

151 -

152 \sa pause(), resume(), togglePaused() -

153 */ -

154 void QFutureWatcherBase::setPaused(bool paused) -

155 { -

156 futureInterface().setPaused(paused); -

157

}

never executed: end of block

158 -

159 /*! \fn void QFutureWatcher::pause() -

160 -

161 Pauses the asynchronous computation represented by the future(). This is a -

162 convenience method that simply calls setPaused(true). -

163 -

164 \sa resume() -

165 */ -

166 void QFutureWatcherBase::pause() -

167 { -

168 futureInterface().setPaused(true); -

169

}

executed 4 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

170 -

171 /*! \fn void QFutureWatcher::resume() -

172 -

173 Resumes the asynchronous computation represented by the future(). This is -

174 a convenience method that simply calls setPaused(false). -

175 -

176 \sa pause() -

177 */ -

178 void QFutureWatcherBase::resume() -

179 { -

180 futureInterface().setPaused(false); -

181

}

executed 4 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

182 -

183 /*! \fn void QFutureWatcher::togglePaused() -

184 -

185 Toggles the paused state of the asynchronous computation. In other words, -

186 if the computation is currently paused, calling this function resumes it; -

187 if the computation is running, it becomes paused. This is a convenience -

188 method for calling setPaused(!isPaused()). -

189 -

190 \sa setPaused(), pause(), resume() -

191 */ -

192 void QFutureWatcherBase::togglePaused() -

193 { -

194 futureInterface().togglePaused(); -

195

}

executed 3 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

196 -

197 /*! \fn int QFutureWatcher::progressValue() const -

198 -

199 Returns the current progress value, which is between the progressMinimum() -

200 and progressMaximum(). -

201 -

202 \sa progressMinimum(), progressMaximum() -

203 */ -

204 int QFutureWatcherBase::progressValue() const -

205 { -

206

return futureInterface().progressValue();

executed 6 times by 1 test: return futureInterface().progressValue();

Executed by:

tst_QFutureWatcher

207 } -

208 -

209 /*! \fn int QFutureWatcher::progressMinimum() const -

210 -

211 Returns the minimum progressValue(). -

212 -

213 \sa progressValue(), progressMaximum() -

214 */ -

215 int QFutureWatcherBase::progressMinimum() const -

216 { -

217

return futureInterface().progressMinimum();

executed 6 times by 1 test: return futureInterface().progressMinimum();

Executed by:

tst_QFutureWatcher

218 } -

219 -

220 /*! \fn int QFutureWatcher::progressMaximum() const -

221 -

222 Returns the maximum progressValue(). -

223 -

224 \sa progressValue(), progressMinimum() -

225 */ -

226 int QFutureWatcherBase::progressMaximum() const -

227 { -

228

return futureInterface().progressMaximum();

executed 6 times by 1 test: return futureInterface().progressMaximum();

Executed by:

tst_QFutureWatcher

229 } -

230 -

231 /*! \fn QString QFutureWatcher::progressText() const -

232 -

233 Returns the (optional) textual representation of the progress as reported -

234 by the asynchronous computation. -

235 -

236 Be aware that not all computations provide a textual representation of the -

237 progress, and as such, this function may return an empty string. -

238 */ -

239 QString QFutureWatcherBase::progressText() const -

240 { -

241

return futureInterface().progressText();

executed 6 times by 1 test: return futureInterface().progressText();

Executed by:

tst_QFutureWatcher

242 } -

243 -

244 /*! \fn bool QFutureWatcher::isStarted() const -

245 -

246 Returns \c true if the asynchronous computation represented by the future() -

247 has been started; otherwise returns \c false. -

248 */ -

249 bool QFutureWatcherBase::isStarted() const -

250 { -

251

return futureInterface().queryState(QFutureInterfaceBase::Started);

executed 7 times by 1 test: return futureInterface().queryState(QFutureInterfaceBase::Started);

Executed by:

tst_QFutureWatcher

252 } -

253 -

254 /*! \fn bool QFutureWatcher::isFinished() const -

255 -

256 Returns \c true if the asynchronous computation represented by the future() -

257 has finished, or if no future has been set; otherwise returns \c false. -

258 */ -

259 bool QFutureWatcherBase::isFinished() const -

260 { -

261 Q_D(const QFutureWatcherBase); -

262

return d->finished;

executed 11 times by 1 test: return d->finished;

Executed by:

tst_QFutureWatcher

263 } -

264 -

265 /*! \fn bool QFutureWatcher::isRunning() const -

266 -

267 Returns \c true if the asynchronous computation represented by the future() -

268 is currently running; otherwise returns \c false. -

269 */ -

270 bool QFutureWatcherBase::isRunning() const -

271 { -

272

return futureInterface().queryState(QFutureInterfaceBase::Running);

executed 6 times by 1 test: return futureInterface().queryState(QFutureInterfaceBase::Running);

Executed by:

tst_QFutureWatcher

273 } -

274 -

275 /*! \fn bool QFutureWatcher::isCanceled() const -

276 -

277 Returns \c true if the asynchronous computation has been canceled with the -

278 cancel() function; otherwise returns \c false. -

279 -

280 Be aware that the computation may still be running even though this -

281 function returns \c true. See cancel() for more details. -

282 */ -

283 bool QFutureWatcherBase::isCanceled() const -

284 { -

285

return futureInterface().queryState(QFutureInterfaceBase::Canceled);

executed 7 times by 1 test: return futureInterface().queryState(QFutureInterfaceBase::Canceled);

Executed by:

tst_QFutureWatcher

286 } -

287 -

288 /*! \fn bool QFutureWatcher::isPaused() const -

289 -

290 Returns \c true if the asynchronous computation has been paused with the -

291 pause() function; otherwise returns \c false. -

292 -

293 Be aware that the computation may still be running even though this -

294 function returns \c true. See setPaused() for more details. -

295 -

296 \sa setPaused(), togglePaused() -

297 */ -

298 bool QFutureWatcherBase::isPaused() const -

299 { -

300

return futureInterface().queryState(QFutureInterfaceBase::Paused);

executed 6 times by 1 test: return futureInterface().queryState(QFutureInterfaceBase::Paused);

Executed by:

tst_QFutureWatcher

301 } -

302 -

303 /*! \fn void QFutureWatcher::waitForFinished() -

304 -

305 Waits for the asynchronous computation to finish (including cancel()ed -

306 computations). -

307 */ -

308 void QFutureWatcherBase::waitForFinished() -

309 { -

310 futureInterface().waitForFinished(); -

311

}

executed 4 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

312 -

313 bool QFutureWatcherBase::event(QEvent *event) -

314 { -

315 Q_D(QFutureWatcherBase); -

316

if (event->type() == QEvent::FutureCallOut) {

event->type() ...:FutureCallOut	Description
TRUE	evaluated 1288 times by 1 test Evaluated by: tst_QFutureWatcher
FALSE	never evaluated

0-1288

317 QFutureCallOutEvent *callOutEvent = static_cast<QFutureCallOutEvent *>(event); -

318 -

319

if (futureInterface().isPaused()) {

futureInterface().isPaused()	Description
TRUE	evaluated 7 times by 1 test Evaluated by: tst_QFutureWatcher
FALSE	evaluated 1281 times by 1 test Evaluated by: tst_QFutureWatcher

7-1281

320 d->pendingCallOutEvents.append(callOutEvent->clone()); -

321

return true;

executed 7 times by 1 test: return true;

Executed by:

tst_QFutureWatcher

322 } -

323 -

324

if (callOutEvent->callOutType == QFutureCallOutEvent::Resumed

callOutEvent->...Event::Resumed	Description
TRUE	evaluated 1 time by 1 test Evaluated by: tst_QFutureWatcher
FALSE	evaluated 1280 times by 1 test Evaluated by: tst_QFutureWatcher

1-1280

325

&& !d->pendingCallOutEvents.isEmpty()) {

!d->pendingCal...ents.isEmpty()	Description
TRUE	evaluated 1 time by 1 test Evaluated by: tst_QFutureWatcher
FALSE	never evaluated

0-1

326 // send the resume -

327 d->sendCallOutEvent(callOutEvent); -

328 -

329 // next send all pending call outs -

330

for (int i = 0; i < d->pendingCallOutEvents.count(); ++i)

i < d->pending...Events.count()	Description
TRUE	evaluated 7 times by 1 test Evaluated by: tst_QFutureWatcher
FALSE	evaluated 1 time by 1 test Evaluated by: tst_QFutureWatcher

1-7

331

d->sendCallOutEvent(d->pendingCallOutEvents.at(i));

executed 7 times by 1 test: d->sendCallOutEvent(d->pendingCallOutEvents.at(i));

Executed by:

tst_QFutureWatcher

332 qDeleteAll(d->pendingCallOutEvents); -

333 d->pendingCallOutEvents.clear(); -

334

} else {

executed 1 time by 1 test: end of block

Executed by:

tst_QFutureWatcher

335 d->sendCallOutEvent(callOutEvent); -

336

}

executed 1280 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

1280

337

return true;

executed 1281 times by 1 test: return true;

Executed by:

tst_QFutureWatcher

1281

338 } -

339

return QObject::event(event);

never executed: return QObject::event(event);

340 } -

341 -

342 /*! \fn void QFutureWatcher::setPendingResultsLimit(int limit) -

343 -

344 The setPendingResultsLimit() provides throttling control. When the number -

345 of pending resultReadyAt() or resultsReadyAt() signals exceeds the -

346 \a limit, the computation represented by the future will be throttled -

347 automatically. The computation will resume once the number of pending -

348 signals drops below the \a limit. -

349 */ -

350 void QFutureWatcherBase::setPendingResultsLimit(int limit) -

351 { -

352 Q_D(QFutureWatcherBase); -

353 d->maximumPendingResultsReady = limit; -

354

}

never executed: end of block

355 -

356 void QFutureWatcherBase::connectNotify(const QMetaMethod &signal) -

357 { -

358 Q_D(QFutureWatcherBase); -

359 static const QMetaMethod resultReadyAtSignal = QMetaMethod::fromSignal(&QFutureWatcherBase::resultReadyAt); -

360

if (signal == resultReadyAtSignal)

signal == resultReadyAtSignal	Description
TRUE	evaluated 19 times by 1 test Evaluated by: tst_QFutureWatcher
FALSE	evaluated 23 times by 1 test Evaluated by: tst_QFutureWatcher

19-23

361

d->resultAtConnected.ref();

executed 19 times by 1 test: d->resultAtConnected.ref();

Executed by:

tst_QFutureWatcher

362 #ifndef QT_NO_DEBUG -

363 static const QMetaMethod finishedSignal = QMetaMethod::fromSignal(&QFutureWatcherBase::finished); -

364

if (signal == finishedSignal) {

signal == finishedSignal	Description
TRUE	evaluated 11 times by 1 test Evaluated by: tst_QFutureWatcher
FALSE	evaluated 31 times by 1 test Evaluated by: tst_QFutureWatcher

11-31

365

if (futureInterface().isRunning()) {

futureInterface().isRunning()	Description
TRUE	evaluated 1 time by 1 test Evaluated by: tst_QFutureWatcher
FALSE	evaluated 10 times by 1 test Evaluated by: tst_QFutureWatcher

1-10

366 //connections should be established before calling stFuture to avoid race. -

367 // (The future could finish before the connection is made.) -

368 qWarning("QFutureWatcher::connect: connecting after calling setFuture() is likely to produce race"); -

369

}

executed 1 time by 1 test: end of block

Executed by:

tst_QFutureWatcher

370

}

executed 11 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

371 #endif -

372

}

executed 42 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

373 -

374 void QFutureWatcherBase::disconnectNotify(const QMetaMethod &signal) -

375 { -

376 Q_D(QFutureWatcherBase); -

377 static const QMetaMethod resultReadyAtSignal = QMetaMethod::fromSignal(&QFutureWatcherBase::resultReadyAt); -

378

if (signal == resultReadyAtSignal)

signal == resultReadyAtSignal	Description
TRUE	evaluated 16 times by 1 test Evaluated by: tst_QFutureWatcher
FALSE	evaluated 15 times by 1 test Evaluated by: tst_QFutureWatcher

15-16

379

d->resultAtConnected.deref();

executed 16 times by 1 test: d->resultAtConnected.deref();

Executed by:

tst_QFutureWatcher

380

}

executed 31 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

381 -

382 /*! -

383 \internal -

384 */ -

385 QFutureWatcherBasePrivate::QFutureWatcherBasePrivate() -

386 : maximumPendingResultsReady(QThread::idealThreadCount() * 2), -

387 resultAtConnected(0), -

388 finished(true) /* the initial m_future is a canceledResult(), with Finished set */ -

389

{

executed 23 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

}

executed 23 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

390 -

391 /*! -

392 \internal -

393 */ -

394 void QFutureWatcherBase::connectOutputInterface() -

395 { -

396 futureInterface().d->connectOutputInterface(d_func()); -

397

}

executed 28 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

398 -

399 /*! -

400 \internal -

401 */ -

402 void QFutureWatcherBase::disconnectOutputInterface(bool pendingAssignment) -

403 { -

404

if (pendingAssignment) {

pendingAssignment	Description
TRUE	evaluated 28 times by 1 test Evaluated by: tst_QFutureWatcher
FALSE	evaluated 23 times by 1 test Evaluated by: tst_QFutureWatcher

23-28

405 Q_D(QFutureWatcherBase); -

406 d->pendingResultsReady.store(0); -

407 qDeleteAll(d->pendingCallOutEvents); -

408 d->pendingCallOutEvents.clear(); -

409 d->finished = false; /* May soon be amended, during connectOutputInterface() */ -

410

}

executed 28 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

411 -

412 futureInterface().d->disconnectOutputInterface(d_func()); -

413

}

executed 51 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

414 -

415 void QFutureWatcherBasePrivate::postCallOutEvent(const QFutureCallOutEvent &callOutEvent) -

416 { -

417 Q_Q(QFutureWatcherBase); -

418 -

419

if (callOutEvent.callOutType == QFutureCallOutEvent::ResultsReady) {

callOutEvent.c...::ResultsReady	Description
TRUE	evaluated 1185 times by 1 test Evaluated by: tst_QFutureWatcher
FALSE	evaluated 160 times by 1 test Evaluated by: tst_QFutureWatcher

160-1185

420

if (pendingResultsReady.fetchAndAddRelaxed(1) >= maximumPendingResultsReady)

pendingResults...ngResultsReady	Description
TRUE	evaluated 1164 times by 1 test Evaluated by: tst_QFutureWatcher
FALSE	evaluated 21 times by 1 test Evaluated by: tst_QFutureWatcher

21-1164

421

q->futureInterface().d->internal_setThrottled(true);

executed 1164 times by 1 test: q->futureInterface().d->internal_setThrottled(true);

Executed by:

tst_QFutureWatcher

1164

422

}

executed 1185 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

1185

423 -

424 QCoreApplication::postEvent(q, callOutEvent.clone()); -

425

}

executed 1345 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

1345

426 -

427 void QFutureWatcherBasePrivate::callOutInterfaceDisconnected() -

428 { -

429 QCoreApplication::removePostedEvents(q_func(), QEvent::FutureCallOut); -

430

}

executed 28 times by 1 test: end of block

Executed by:

tst_QFutureWatcher

431 -

432 void QFutureWatcherBasePrivate::sendCallOutEvent(QFutureCallOutEvent *event) -

433 { -

434 Q_Q(QFutureWatcherBase); -

435 -

436 switch (event->callOutType) { -

437

case QFutureCallOutEvent::Started:

executed 20 times by 1 test: case QFutureCallOutEvent::Started:

Executed by:

tst_QFutureWatcher

438 emit q->started(); -

439

break;

executed 20 times by 1 test: break;

Executed by:

tst_QFutureWatcher

440

case QFutureCallOutEvent::Finished:

executed 17 times by 1 test: case QFutureCallOutEvent::Finished:

Executed by:

tst_QFutureWatcher

441 finished = true; -

442 emit q->finished(); -

443

break;

executed 17 times by 1 test: break;

Executed by:

tst_QFutureWatcher

444

case QFutureCallOutEvent::Canceled:

executed 5 times by 1 test: case QFutureCallOutEvent::Canceled:

Executed by:

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445 pendingResultsReady.store(0); -

446 emit q->canceled(); -

447

break;

executed 5 times by 1 test: break;

Executed by:

tst_QFutureWatcher

448

case QFutureCallOutEvent::Paused:

executed 1 time by 1 test: case QFutureCallOutEvent::Paused:

Executed by:

tst_QFutureWatcher

449

if (q->futureInterface().isCanceled())

q->futureInter...).isCanceled()	Description
TRUE	never evaluated
FALSE	evaluated 1 time by 1 test Evaluated by: tst_QFutureWatcher

0-1

450

break;

never executed: break;

451 emit q->paused(); -

452

break;

executed 1 time by 1 test: break;

Executed by:

tst_QFutureWatcher

453

case QFutureCallOutEvent::Resumed:

executed 1 time by 1 test: case QFutureCallOutEvent::Resumed:

Executed by:

tst_QFutureWatcher

454

if (q->futureInterface().isCanceled())

q->futureInter...).isCanceled()	Description
TRUE	never evaluated
FALSE	evaluated 1 time by 1 test Evaluated by: tst_QFutureWatcher

0-1

455

break;

never executed: break;

456 emit q->resumed(); -

457

break;

executed 1 time by 1 test: break;

Executed by:

tst_QFutureWatcher

458

case QFutureCallOutEvent::ResultsReady: {

executed 1180 times by 1 test: case QFutureCallOutEvent::ResultsReady:

Executed by:

tst_QFutureWatcher

1180

459

if (q->futureInterface().isCanceled())

q->futureInter...).isCanceled()	Description
TRUE	evaluated 1 time by 1 test Evaluated by: tst_QFutureWatcher
FALSE	evaluated 1179 times by 1 test Evaluated by: tst_QFutureWatcher

1-1179

460

break;

executed 1 time by 1 test: break;

Executed by:

tst_QFutureWatcher

461 -

462

if (pendingResultsReady.fetchAndAddRelaxed(-1) <= maximumPendingResultsReady)

pendingResults...ngResultsReady	Description
TRUE	evaluated 15 times by 1 test Evaluated by: tst_QFutureWatcher
FALSE	evaluated 1164 times by 1 test Evaluated by: tst_QFutureWatcher

15-1164

463

q->futureInterface().setThrottled(false);

executed 15 times by 1 test: q->futureInterface().setThrottled(false);

Executed by:

tst_QFutureWatcher

464 -

465 const int beginIndex = event->index1; -

466 const int endIndex = event->index2; -

467 -

468 emit q->resultsReadyAt(beginIndex, endIndex); -

469 -

470

if (resultAtConnected.load() <= 0)

resultAtConnected.load() <= 0	Description
TRUE	evaluated 1001 times by 1 test Evaluated by: tst_QFutureWatcher
FALSE	evaluated 178 times by 1 test Evaluated by: tst_QFutureWatcher

178-1001

471

break;

executed 1001 times by 1 test: break;

Executed by:

tst_QFutureWatcher

1001

472 -

473

for (int i = beginIndex; i < endIndex; ++i)

i < endIndex	Description
TRUE	evaluated 15008 times by 1 test Evaluated by: tst_QFutureWatcher
FALSE	evaluated 178 times by 1 test Evaluated by: tst_QFutureWatcher

178-15008

474

emit q->resultReadyAt(i);

Executed by:

tst_QFutureWatcher

15008

475 -

476

} break;

executed 178 times by 1 test: break;

Executed by:

tst_QFutureWatcher

178

477

case QFutureCallOutEvent::Progress:

executed 44 times by 1 test: case QFutureCallOutEvent::Progress:

Executed by:

tst_QFutureWatcher

478

if (q->futureInterface().isCanceled())

q->futureInter...).isCanceled()	Description
TRUE	evaluated 5 times by 1 test Evaluated by: tst_QFutureWatcher
FALSE	evaluated 39 times by 1 test Evaluated by: tst_QFutureWatcher

5-39

479

break;

executed 5 times by 1 test: break;

Executed by:

tst_QFutureWatcher

480 -

481 emit q->progressValueChanged(event->index1); -

482

if (!event->text.isNull()) // ###

!event->text.isNull()	Description
TRUE	evaluated 4 times by 1 test Evaluated by: tst_QFutureWatcher
FALSE	evaluated 35 times by 1 test Evaluated by: tst_QFutureWatcher

4-35

483

q->progressTextChanged(event->text);

executed 4 times by 1 test: q->progressTextChanged(event->text);

Executed by:

tst_QFutureWatcher

484

break;

executed 39 times by 1 test: break;

Executed by:

tst_QFutureWatcher

485

case QFutureCallOutEvent::ProgressRange:

executed 20 times by 1 test: case QFutureCallOutEvent::ProgressRange:

Executed by:

tst_QFutureWatcher

486 emit q->progressRangeChanged(event->index1, event->index2); -

487

break;

executed 20 times by 1 test: break;

Executed by:

tst_QFutureWatcher

488

default: break;

never executed: break;

never executed: default:

489 } -

490 } -

491 -

492 -

493 /*! \fn const T &QFutureWatcher::result() const -

494 -

495 Returns the first result in the future(). If the result is not immediately -

496 available, this function will block and wait for the result to become -

497 available. This is a convenience method for calling resultAt(0). -

498 -

499 \sa resultAt() -

500 */ -

501 -

502 /*! \fn const T &QFutureWatcher::resultAt(int index) const -

503 -

504 Returns the result at \a index in the future(). If the result is not -

505 immediately available, this function will block and wait for the result to -

506 become available. -

507 -

508 \sa result() -

509 */ -

510 -

511 /*! \fn void QFutureWatcher::setFuture(const QFuture<T> &future) -

512 -

513 Starts watching the given \a future. -

514 -

515 One of the signals might be emitted for the current state of the -

516 \a future. For example, if the future is already stopped, the -

517 finished signal will be emitted. -

518 -

519 To avoid a race condition, it is important to call this function -

520 \e after doing the connections. -

521 */ -

522 -

523 /*! \fn QFuture<T> QFutureWatcher::future() const -

524 -

525 Returns the watched future. -

526 */ -

527 -

528 /*! \fn void QFutureWatcher::started() -

529 -

530 This signal is emitted when this QFutureWatcher starts watching the future -

531 set with setFuture(). -

532 */ -

533 -

534 /*! -

535 \fn void QFutureWatcher::finished() -

536 This signal is emitted when the watched future finishes. -

537 */ -

538 -

539 /*! -

540 \fn void QFutureWatcher::canceled() -

541 This signal is emitted if the watched future is canceled. -

542 */ -

543 -

544 /*! \fn void QFutureWatcher::paused() -

545 This signal is emitted when the watched future is paused. -

546 */ -

547 -

548 /*! \fn void QFutureWatcher::resumed() -

549 This signal is emitted when the watched future is resumed. -

550 */ -

551 -

552 /*! -

553 \fn void QFutureWatcher::progressRangeChanged(int minimum, int maximum) -

554 -

555 The progress range for the watched future has changed to \a minimum and -

556 \a maximum -

557 */ -

558 -

559 /*! -

560 \fn void QFutureWatcher::progressValueChanged(int progressValue) -

561 -

562 This signal is emitted when the watched future reports progress, -

563 \a progressValue gives the current progress. In order to avoid overloading -

564 the GUI event loop, QFutureWatcher limits the progress signal emission -

565 rate. This means that listeners connected to this slot might not get all -

566 progress reports the future makes. The last progress update (where -

567 \a progressValue equals the maximum value) will always be delivered. -

568 */ -

569 -

570 /*! \fn void QFutureWatcher::progressTextChanged(const QString &progressText) -

571 -

572 This signal is emitted when the watched future reports textual progress -

573 information, \a progressText. -

574 */ -

575 -

576 /*! -

577 \fn void QFutureWatcher::resultReadyAt(int index) -

578 -

579 This signal is emitted when the watched future reports a ready result at -

580 \a index. If the future reports multiple results, the index will indicate -

581 which one it is. Results can be reported out-of-order. To get the result, -

582 call future().result(index); -

583 */ -

584 -

585 /*! -

586 \fn void QFutureWatcher::resultsReadyAt(int beginIndex, int endIndex); -

587 -

588 This signal is emitted when the watched future reports ready results. -

589 The results are indexed from \a beginIndex to \a endIndex. -

590 -

591 */ -

592 -

593 QT_END_NAMESPACE -

594 -

595 #endif // QT_NO_QFUTURE -

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