ProgressImpl.cpp@ 72057

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1	/* $Id: ProgressImpl.cpp 69500 2017-10-28 15:14:05Z vboxsync $ */
2	/** @file
3	*
4	* VirtualBox Progress COM class implementation
5	*/
6
7	/*
8	* Copyright (C) 2006-2017 Oracle Corporation
9	*
10	* This file is part of VirtualBox Open Source Edition (OSE), as
11	* available from http://www.virtualbox.org. This file is free software;
12	* you can redistribute it and/or modify it under the terms of the GNU
13	* General Public License (GPL) as published by the Free Software
14	* Foundation, in version 2 as it comes in the "COPYING" file of the
15	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
16	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
17	*/
18
19	#include <iprt/types.h>
20
21
22	#if defined(VBOX_WITH_XPCOM)
23	#include <nsIServiceManager.h>
24	#include <nsIExceptionService.h>
25	#include <nsCOMPtr.h>
26	#endif /* defined(VBOX_WITH_XPCOM) */
27
28	#include "ProgressImpl.h"
29
30	#if !defined(VBOX_COM_INPROC)
31	# include "VirtualBoxImpl.h"
32	#endif
33	#include "VirtualBoxErrorInfoImpl.h"
34
35	#include "Logging.h"
36
37	#include <iprt/time.h>
38	#include <iprt/semaphore.h>
39	#include <iprt/cpp/utils.h>
40
41	#include <VBox/err.h>
42	#include "AutoCaller.h"
43
44	#include "VBoxEvents.h"
45
46	Progress::Progress()
47	#if !defined(VBOX_COM_INPROC)
48	: mParent(NULL)
49	#endif
50	{
51	}
52
53	Progress::~Progress()
54	{
55	}
56
57
58	HRESULT Progress::FinalConstruct()
59	{
60	mCancelable = FALSE;
61	mCompleted = FALSE;
62	mCanceled = FALSE;
63	mResultCode = S_OK;
64
65	m_cOperations
66	= m_ulTotalOperationsWeight
67	= m_ulOperationsCompletedWeight
68	= m_ulCurrentOperation
69	= m_ulCurrentOperationWeight
70	= m_ulOperationPercent
71	= m_cMsTimeout
72	= 0;
73
74	// get creation timestamp
75	m_ullTimestamp = RTTimeMilliTS();
76
77	m_pfnCancelCallback = NULL;
78	m_pvCancelUserArg = NULL;
79
80	mCompletedSem = NIL_RTSEMEVENTMULTI;
81	mWaitersCount = 0;
82
83	return Progress::BaseFinalConstruct();
84	}
85
86	void Progress::FinalRelease()
87	{
88	uninit();
89	BaseFinalRelease();
90	}
91
92	// public initializer/uninitializer for internal purposes only
93	////////////////////////////////////////////////////////////////////////////////
94
95	/**
96	* Initializes the normal progress object. With this variant, one can have
97	* an arbitrary number of sub-operation which IProgress can analyze to
98	* have a weighted progress computed.
99	*
100	* For example, say that one IProgress is supposed to track the cloning
101	* of two hard disk images, which are 100 MB and 1000 MB in size, respectively,
102	* and each of these hard disks should be one sub-operation of the IProgress.
103	*
104	* Obviously the progress would be misleading if the progress displayed 50%
105	* after the smaller image was cloned and would then take much longer for
106	* the second half.
107	*
108	* With weighted progress, one can invoke the following calls:
109	*
110	* 1) create progress object with cOperations = 2 and ulTotalOperationsWeight =
111	* 1100 (100 MB plus 1100, but really the weights can be any ULONG); pass
112	* in ulFirstOperationWeight = 100 for the first sub-operation
113	*
114	* 2) Then keep calling setCurrentOperationProgress() with a percentage
115	* for the first image; the total progress will increase up to a value
116	* of 9% (100MB / 1100MB * 100%).
117	*
118	* 3) Then call setNextOperation with the second weight (1000 for the megabytes
119	* of the second disk).
120	*
121	* 4) Then keep calling setCurrentOperationProgress() with a percentage for
122	* the second image, where 100% of the operation will then yield a 100%
123	* progress of the entire task.
124	*
125	* Weighting is optional; you can simply assign a weight of 1 to each operation
126	* and pass ulTotalOperationsWeight == cOperations to this constructor (but
127	* for that variant and for backwards-compatibility a simpler constructor exists
128	* in ProgressImpl.h as well).
129	*
130	* Even simpler, if you need no sub-operations at all, pass in cOperations =
131	* ulTotalOperationsWeight = ulFirstOperationWeight = 1.
132	*
133	* @param aParent Parent object (only for server-side Progress objects).
134	* @param aInitiator Initiator of the task (for server-side objects. Can be
135	* NULL which means initiator = parent, otherwise must not
136	* be NULL).
137	* @param aDescription Overall task description.
138	* @param aCancelable Flag whether the task maybe canceled.
139	* @param cOperations Number of operations within this task (at least 1).
140	* @param ulTotalOperationsWeight Total weight of operations; must be the sum of ulFirstOperationWeight and
141	* what is later passed with each subsequent setNextOperation() call.
142	* @param aFirstOperationDescription Description of the first operation.
143	* @param ulFirstOperationWeight Weight of first sub-operation.
144	*/
145	HRESULT Progress::init(
146	#if !defined(VBOX_COM_INPROC)
147	VirtualBox *aParent,
148	#endif
149	IUnknown *aInitiator,
150	Utf8Str aDescription,
151	BOOL aCancelable,
152	ULONG cOperations,
153	ULONG ulTotalOperationsWeight,
154	Utf8Str aFirstOperationDescription,
155	ULONG ulFirstOperationWeight)
156	{
157	LogFlowThisFunc(("aDescription=\"%s\", cOperations=%d, ulTotalOperationsWeight=%d, aFirstOperationDescription=\"%s\", ulFirstOperationWeight=%d\n",
158	aDescription.c_str(),
159	cOperations,
160	ulTotalOperationsWeight,
161	aFirstOperationDescription.c_str(),
162	ulFirstOperationWeight));
163
164	AssertReturn(ulTotalOperationsWeight >= 1, E_INVALIDARG);
165
166	/* Enclose the state transition NotReady->InInit->Ready */
167	AutoInitSpan autoInitSpan(this);
168	AssertReturn(autoInitSpan.isOk(), E_FAIL);
169
170	HRESULT rc = S_OK;
171	rc = unconst(pEventSource).createObject();
172	if (FAILED(rc)) throw rc;
173
174	rc = pEventSource->init();
175	if (FAILED(rc)) throw rc;
176
177	// rc = Progress::init(
178	//#if !defined(VBOX_COM_INPROC)
179	// aParent,
180	//#endif
181	// aInitiator, aDescription, FALSE, aId);
182	// NA
183	#if !defined(VBOX_COM_INPROC)
184	AssertReturn(aParent, E_INVALIDARG);
185	#else
186	AssertReturn(aInitiator, E_INVALIDARG);
187	#endif
188
189	#if !defined(VBOX_COM_INPROC)
190	/* share parent weakly */
191	unconst(mParent) = aParent;
192	#endif
193
194	#if !defined(VBOX_COM_INPROC)
195	/* assign (and therefore addref) initiator only if it is not VirtualBox
196	* (to avoid cycling); otherwise mInitiator will remain null which means
197	* that it is the same as the parent */
198	if (aInitiator)
199	{
200	ComObjPtr<VirtualBox> pVirtualBox(mParent);
201	if (!(pVirtualBox == aInitiator))
202	unconst(mInitiator) = aInitiator;
203	}
204	#else
205	unconst(mInitiator) = aInitiator;
206	#endif
207
208	unconst(mId).create();
209
210	#if !defined(VBOX_COM_INPROC)
211	/* add to the global collection of progress operations (note: after
212	* creating mId) */
213	mParent->i_addProgress(this);
214	#endif
215
216	unconst(mDescription) = aDescription;
217
218
219	// end of assertion
220
221
222	if (FAILED(rc)) return rc;
223
224	mCancelable = aCancelable;
225
226	m_cOperations = cOperations;
227	m_ulTotalOperationsWeight = ulTotalOperationsWeight;
228	m_ulOperationsCompletedWeight = 0;
229	m_ulCurrentOperation = 0;
230	m_operationDescription = aFirstOperationDescription;
231	m_ulCurrentOperationWeight = ulFirstOperationWeight;
232	m_ulOperationPercent = 0;
233
234	int vrc = RTSemEventMultiCreate(&mCompletedSem);
235	ComAssertRCRet(vrc, E_FAIL);
236
237	RTSemEventMultiReset(mCompletedSem);
238
239	/* Confirm a successful initialization when it's the case */
240	if (SUCCEEDED(rc))
241	autoInitSpan.setSucceeded();
242
243	return rc;
244	}
245
246	/**
247	* Initializes the sub-progress object that represents a specific operation of
248	* the whole task.
249	*
250	* Objects initialized with this method are then combined together into the
251	* single task using a Progress instance, so it doesn't require the
252	* parent, initiator, description and doesn't create an ID. Note that calling
253	* respective getter methods on an object initialized with this method is
254	* useless. Such objects are used only to provide a separate wait semaphore and
255	* store individual operation descriptions.
256	*
257	* @param aCancelable Flag whether the task maybe canceled.
258	* @param aOperationCount Number of sub-operations within this task (at least 1).
259	* @param aOperationDescription Description of the individual operation.
260	*/
261	HRESULT Progress::init(BOOL aCancelable,
262	ULONG aOperationCount,
263	Utf8Str aOperationDescription)
264	{
265	LogFlowThisFunc(("aOperationDescription=\"%s\"\n", aOperationDescription.c_str()));
266
267	/* Enclose the state transition NotReady->InInit->Ready */
268	AutoInitSpan autoInitSpan(this);
269	AssertReturn(autoInitSpan.isOk(), E_FAIL);
270
271	HRESULT rc = S_OK;
272	/* Guarantees subclasses call this method at the proper time */
273	NOREF(autoInitSpan);
274
275	if (FAILED(rc)) return rc;
276
277	mCancelable = aCancelable;
278
279	// for this variant we assume for now that all operations are weighed "1"
280	// and equal total weight = operation count
281	m_cOperations = aOperationCount;
282	m_ulTotalOperationsWeight = aOperationCount;
283	m_ulOperationsCompletedWeight = 0;
284	m_ulCurrentOperation = 0;
285	m_operationDescription = aOperationDescription;
286	m_ulCurrentOperationWeight = 1;
287	m_ulOperationPercent = 0;
288
289	int vrc = RTSemEventMultiCreate(&mCompletedSem);
290	ComAssertRCRet(vrc, E_FAIL);
291
292	RTSemEventMultiReset(mCompletedSem);
293
294	/* Confirm a successful initialization when it's the case */
295	if (SUCCEEDED(rc))
296	autoInitSpan.setSucceeded();
297
298	return rc;
299	}
300
301
302	/**
303	* Uninitializes the instance and sets the ready flag to FALSE.
304	*
305	* Called either from FinalRelease() or by the parent when it gets destroyed.
306	*/
307	void Progress::uninit()
308	{
309	LogFlowThisFunc(("\n"));
310
311	/* Enclose the state transition Ready->InUninit->NotReady */
312	AutoUninitSpan autoUninitSpan(this);
313	if (autoUninitSpan.uninitDone())
314	return;
315
316	/* wake up all threads still waiting on occasion */
317	if (mWaitersCount > 0)
318	{
319	LogFlow(("WARNING: There are still %d threads waiting for '%s' completion!\n",
320	mWaitersCount, mDescription.c_str()));
321	RTSemEventMultiSignal(mCompletedSem);
322	}
323
324	RTSemEventMultiDestroy(mCompletedSem);
325
326	/* release initiator (effective only if mInitiator has been assigned in init()) */
327	unconst(mInitiator).setNull();
328
329	#if !defined(VBOX_COM_INPROC)
330	if (mParent)
331	{
332	/* remove the added progress on failure to complete the initialization */
333	if (autoUninitSpan.initFailed() && mId.isValid() && !mId.isZero())
334	mParent->i_removeProgress(mId.ref());
335
336	unconst(mParent) = NULL;
337	}
338	#endif
339	}
340
341
342	// public methods only for internal purposes
343	////////////////////////////////////////////////////////////////////////////////
344
345	/**
346	* Marks the whole task as complete and sets the result code.
347	*
348	* If the result code indicates a failure (\|FAILED(@a aResultCode)\|) then this
349	* method will import the error info from the current thread and assign it to
350	* the errorInfo attribute (it will return an error if no info is available in
351	* such case).
352	*
353	* If the result code indicates a success (\|SUCCEEDED(@a aResultCode)\|) then
354	* the current operation is set to the last.
355	*
356	* Note that this method may be called only once for the given Progress object.
357	* Subsequent calls will assert.
358	*
359	* @param aResultCode Operation result code.
360	*/
361	HRESULT Progress::i_notifyComplete(HRESULT aResultCode)
362	{
363	HRESULT rc;
364	ComPtr<IVirtualBoxErrorInfo> errorInfo;
365	if (FAILED(aResultCode))
366	{
367	/* try to import error info from the current thread */
368	#if !defined(VBOX_WITH_XPCOM)
369	ComPtr<IErrorInfo> err;
370	rc = ::GetErrorInfo(0, err.asOutParam());
371	if (rc == S_OK && err)
372	rc = err.queryInterfaceTo(errorInfo.asOutParam());
373	#else /* !defined(VBOX_WITH_XPCOM) */
374	nsCOMPtr<nsIExceptionService> es;
375	es = do_GetService(NS_EXCEPTIONSERVICE_CONTRACTID, &rc);
376	if (NS_SUCCEEDED(rc))
377	{
378	nsCOMPtr <nsIExceptionManager> em;
379	rc = es->GetCurrentExceptionManager(getter_AddRefs(em));
380	if (NS_SUCCEEDED(rc))
381	{
382	ComPtr<nsIException> ex;
383	rc = em->GetCurrentException(ex.asOutParam());
384	if (NS_SUCCEEDED(rc) && ex)
385	rc = ex.queryInterfaceTo(errorInfo.asOutParam());
386	}
387	}
388	#endif /* !defined(VBOX_WITH_XPCOM) */
389	}
390
391	return i_notifyCompleteEI(aResultCode, errorInfo);
392	}
393
394	/**
395	* Wrapper around Progress:notifyCompleteV.
396	*/
397	HRESULT Progress::i_notifyComplete(HRESULT aResultCode,
398	const GUID &aIID,
399	const char *pcszComponent,
400	const char *aText,
401	...)
402	{
403	va_list va;
404	va_start(va, aText);
405	HRESULT hrc = i_notifyCompleteV(aResultCode, aIID, pcszComponent, aText, va);
406	va_end(va);
407	return hrc;
408	}
409
410	/**
411	* Marks the operation as complete and attaches full error info.
412	*
413	* @param aResultCode Operation result (error) code, must not be S_OK.
414	* @param aIID IID of the interface that defines the error.
415	* @param pcszComponent Name of the component that generates the error.
416	* @param aText Error message (must not be null), an RTStrPrintf-like
417	* format string in UTF-8 encoding.
418	* @param va List of arguments for the format string.
419	*/
420	HRESULT Progress::i_notifyCompleteV(HRESULT aResultCode,
421	const GUID &aIID,
422	const char *pcszComponent,
423	const char *aText,
424	va_list va)
425	{
426	/* expected to be used only in case of error */
427	Assert(FAILED(aResultCode));
428
429	Utf8Str text(aText, va);
430	ComObjPtr<VirtualBoxErrorInfo> errorInfo;
431	HRESULT rc = errorInfo.createObject();
432	AssertComRCReturnRC(rc);
433	errorInfo->init(aResultCode, aIID, pcszComponent, text);
434
435	return i_notifyCompleteEI(aResultCode, errorInfo);
436	}
437
438	/**
439	* Marks the operation as complete and attaches full error info.
440	*
441	* This is where the actual work is done, the related methods all end up here.
442	*
443	* @param aResultCode Operation result (error) code, must not be S_OK.
444	* @param aErrorInfo List of arguments for the format string.
445	*/
446	HRESULT Progress::i_notifyCompleteEI(HRESULT aResultCode, const ComPtr<IVirtualBoxErrorInfo> &aErrorInfo)
447	{
448	LogThisFunc(("aResultCode=%d\n", aResultCode));
449	/* on failure we expect error info, on success there must be none */
450	AssertMsg(FAILED(aResultCode) ^ aErrorInfo.isNull(),
451	("No error info but trying to set a failed result (%08X)!\n",
452	aResultCode));
453
454	AutoCaller autoCaller(this);
455	AssertComRCReturnRC(autoCaller.rc());
456
457	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
458
459	AssertReturn(mCompleted == FALSE, E_FAIL);
460
461	if (mCanceled && SUCCEEDED(aResultCode))
462	aResultCode = E_FAIL;
463
464	mCompleted = TRUE;
465	mResultCode = aResultCode;
466	if (SUCCEEDED(aResultCode))
467	{
468	m_ulCurrentOperation = m_cOperations - 1; /* last operation */
469	m_ulOperationPercent = 100;
470	}
471	mErrorInfo = aErrorInfo;
472
473	#if !defined VBOX_COM_INPROC
474	/* remove from the global collection of pending progress operations */
475	if (mParent)
476	mParent->i_removeProgress(mId.ref());
477	#endif
478
479	/* wake up all waiting threads */
480	if (mWaitersCount > 0)
481	RTSemEventMultiSignal(mCompletedSem);
482
483	fireProgressTaskCompletedEvent(pEventSource, mId.toUtf16().raw());
484
485	return S_OK;
486	}
487
488	/**
489	* Notify the progress object that we're almost at the point of no return.
490	*
491	* This atomically checks for and disables cancelation. Calls to
492	* IProgress::Cancel() made after a successful call to this method will fail
493	* and the user can be told. While this isn't entirely clean behavior, it
494	* prevents issues with an irreversible actually operation succeeding while the
495	* user believe it was rolled back.
496	*
497	* @returns Success indicator.
498	* @retval true on success.
499	* @retval false if the progress object has already been canceled or is in an
500	* invalid state
501	*/
502	bool Progress::i_notifyPointOfNoReturn(void)
503	{
504	AutoCaller autoCaller(this);
505	AssertComRCReturn(autoCaller.rc(), false);
506
507	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
508
509	if (mCanceled)
510	{
511	LogThisFunc(("returns false\n"));
512	return false;
513	}
514
515	mCancelable = FALSE;
516	LogThisFunc(("returns true\n"));
517	return true;
518	}
519
520	/**
521	* Sets the cancelation callback, checking for cancelation first.
522	*
523	* @returns Success indicator.
524	* @retval true on success.
525	* @retval false if the progress object has already been canceled or is in an
526	* invalid state
527	*
528	* @param pfnCallback The function to be called upon cancelation.
529	* @param pvUser The callback argument.
530	*/
531	bool Progress::i_setCancelCallback(void (pfnCallback)(void ), void *pvUser)
532	{
533	AutoCaller autoCaller(this);
534	AssertComRCReturn(autoCaller.rc(), false);
535
536	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
537
538	i_checkForAutomaticTimeout();
539	if (mCanceled)
540	return false;
541
542	m_pvCancelUserArg = pvUser;
543	m_pfnCancelCallback = pfnCallback;
544	return true;
545	}
546
547	/**
548	* @callback_method_impl{FNRTPROGRESS,
549	* Works the progress of the current operation.}
550	*/
551	/static/ DECLCALLBACK(int) Progress::i_iprtProgressCallback(unsigned uPercentage, void *pvUser)
552	{
553	Progress pThis = (Progress )pvUser;
554
555	/*
556	* Same as setCurrentOperationProgress, except we don't fail on mCompleted.
557	*/
558	AutoWriteLock alock(pThis COMMA_LOCKVAL_SRC_POS);
559	int vrc = VINF_SUCCESS;
560	if (!pThis->mCompleted)
561	{
562	pThis->i_checkForAutomaticTimeout();
563	if (!pThis->mCanceled)
564	{
565	if (uPercentage > pThis->m_ulOperationPercent)
566	pThis->setCurrentOperationProgress(uPercentage);
567	}
568	else
569	{
570	Assert(pThis->mCancelable);
571	vrc = VERR_CANCELLED;
572	}
573	}
574	/* else ignored */
575	return vrc;
576	}
577
578	/**
579	* @callback_method_impl{FNVDPROGRESS,
580	* Progress::i_iprtProgressCallback with parameters switched around.}
581	*/
582	/static/ DECLCALLBACK(int) Progress::i_vdProgressCallback(void *pvUser, unsigned uPercentage)
583	{
584	return i_iprtProgressCallback(uPercentage, pvUser);
585	}
586
587	// IProgress properties
588	/////////////////////////////////////////////////////////////////////////////
589
590	HRESULT Progress::getId(com::Guid &aId)
591	{
592	/* mId is constant during life time, no need to lock */
593	aId = mId;
594
595	return S_OK;
596	}
597
598	HRESULT Progress::getDescription(com::Utf8Str &aDescription)
599	{
600	/* mDescription is constant during life time, no need to lock */
601	aDescription = mDescription;
602
603	return S_OK;
604	}
605	HRESULT Progress::getInitiator(ComPtr<IUnknown> &aInitiator)
606	{
607	/* mInitiator/mParent are constant during life time, no need to lock */
608	#if !defined(VBOX_COM_INPROC)
609	if (mInitiator)
610	mInitiator.queryInterfaceTo(aInitiator.asOutParam());
611	else
612	{
613	ComObjPtr<VirtualBox> pVirtualBox(mParent);
614	pVirtualBox.queryInterfaceTo(aInitiator.asOutParam());
615	}
616	#else
617	mInitiator.queryInterfaceTo(aInitiator.asOutParam());
618	#endif
619
620	return S_OK;
621	}
622
623	HRESULT Progress::getCancelable(BOOL *aCancelable)
624	{
625	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
626
627	*aCancelable = mCancelable;
628
629	return S_OK;
630	}
631
632	HRESULT Progress::getPercent(ULONG *aPercent)
633	{
634	/* i_checkForAutomaticTimeout requires a write lock. */
635	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
636
637	if (mCompleted && SUCCEEDED(mResultCode))
638	*aPercent = 100;
639	else
640	{
641	ULONG ulPercent = (ULONG)i_calcTotalPercent();
642	// do not report 100% until we're really really done with everything
643	// as the Qt GUI dismisses progress dialogs in that case
644	if ( ulPercent == 100
645	&& ( m_ulOperationPercent < 100
646	\|\| (m_ulCurrentOperation < m_cOperations -1)
647	)
648	)
649	*aPercent = 99;
650	else
651	*aPercent = ulPercent;
652	}
653
654	i_checkForAutomaticTimeout();
655
656	return S_OK;
657	}
658
659	HRESULT Progress::getTimeRemaining(LONG *aTimeRemaining)
660	{
661	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
662
663	if (mCompleted)
664	*aTimeRemaining = 0;
665	else
666	{
667	double dPercentDone = i_calcTotalPercent();
668	if (dPercentDone < 1)
669	*aTimeRemaining = -1; // unreliable, or avoid division by 0 below
670	else
671	{
672	uint64_t ullTimeNow = RTTimeMilliTS();
673	uint64_t ullTimeElapsed = ullTimeNow - m_ullTimestamp;
674	uint64_t ullTimeTotal = (uint64_t)((double)ullTimeElapsed * 100 / dPercentDone);
675	uint64_t ullTimeRemaining = ullTimeTotal - ullTimeElapsed;
676
677	// LogFunc(("dPercentDone = %RI32, ullTimeNow = %RI64, ullTimeElapsed = %RI64, ullTimeTotal = %RI64, ullTimeRemaining = %RI64\n",
678	// (uint32_t)dPercentDone, ullTimeNow, ullTimeElapsed, ullTimeTotal, ullTimeRemaining));
679
680	*aTimeRemaining = (LONG)(ullTimeRemaining / 1000);
681	}
682	}
683
684	return S_OK;
685	}
686
687	HRESULT Progress::getCompleted(BOOL *aCompleted)
688	{
689	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
690
691	*aCompleted = mCompleted;
692
693	return S_OK;
694	}
695
696	HRESULT Progress::getCanceled(BOOL *aCanceled)
697	{
698	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
699
700	*aCanceled = mCanceled;
701
702	return S_OK;
703	}
704
705	HRESULT Progress::getResultCode(LONG *aResultCode)
706	{
707	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
708
709	if (!mCompleted)
710	return setError(E_FAIL,
711	tr("Result code is not available, operation is still in progress"));
712
713	*aResultCode = mResultCode;
714
715	return S_OK;
716	}
717
718	HRESULT Progress::getErrorInfo(ComPtr<IVirtualBoxErrorInfo> &aErrorInfo)
719	{
720	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
721
722	if (!mCompleted)
723	return setError(E_FAIL,
724	tr("Error info is not available, operation is still in progress"));
725
726	mErrorInfo.queryInterfaceTo(aErrorInfo.asOutParam());
727
728	return S_OK;
729	}
730
731	HRESULT Progress::getOperationCount(ULONG *aOperationCount)
732	{
733	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
734
735	*aOperationCount = m_cOperations;
736
737	return S_OK;
738	}
739
740	HRESULT Progress::getOperation(ULONG *aOperation)
741	{
742	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
743
744	*aOperation = m_ulCurrentOperation;
745
746	return S_OK;
747	}
748
749	HRESULT Progress::getOperationDescription(com::Utf8Str &aOperationDescription)
750	{
751	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
752
753	aOperationDescription = m_operationDescription;
754
755	return S_OK;
756	}
757
758	HRESULT Progress::getOperationPercent(ULONG *aOperationPercent)
759	{
760	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
761
762	if (mCompleted && SUCCEEDED(mResultCode))
763	*aOperationPercent = 100;
764	else
765	*aOperationPercent = m_ulOperationPercent;
766
767	return S_OK;
768	}
769
770	HRESULT Progress::getOperationWeight(ULONG *aOperationWeight)
771	{
772	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
773
774	*aOperationWeight = m_ulCurrentOperationWeight;
775
776	return S_OK;
777	}
778
779	HRESULT Progress::getTimeout(ULONG *aTimeout)
780	{
781	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
782
783	*aTimeout = m_cMsTimeout;
784
785	return S_OK;
786	}
787
788	HRESULT Progress::setTimeout(ULONG aTimeout)
789	{
790	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
791
792	if (!mCancelable)
793	return setError(VBOX_E_INVALID_OBJECT_STATE,
794	tr("Operation cannot be canceled"));
795	m_cMsTimeout = aTimeout;
796
797	return S_OK;
798	}
799
800
801	// IProgress methods
802	/////////////////////////////////////////////////////////////////////////////
803
804	/**
805	* Updates the percentage value of the current operation.
806	*
807	* @param aPercent New percentage value of the operation in progress
808	* (in range [0, 100]).
809	*/
810	HRESULT Progress::setCurrentOperationProgress(ULONG aPercent)
811	{
812	AssertMsgReturn(aPercent <= 100, ("%u\n", aPercent), E_INVALIDARG);
813
814	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
815
816	i_checkForAutomaticTimeout();
817	if (mCancelable && mCanceled)
818	AssertReturn(!mCompleted, E_FAIL);
819	AssertReturn(!mCompleted && !mCanceled, E_FAIL);
820
821	if (m_ulOperationPercent != aPercent)
822	{
823	m_ulOperationPercent = aPercent;
824	ULONG actualPercent = 0;
825	getPercent(&actualPercent);
826	fireProgressPercentageChangedEvent(pEventSource, mId.toUtf16().raw(), actualPercent);
827	}
828
829	return S_OK;
830	}
831
832	/**
833	* Signals that the current operation is successfully completed and advances to
834	* the next operation. The operation percentage is reset to 0.
835	*
836	* @param aNextOperationDescription Description of the next operation.
837	* @param aNextOperationsWeight Weight of the next operation.
838	*
839	* @note The current operation must not be the last one.
840	*/
841	HRESULT Progress::setNextOperation(const com::Utf8Str &aNextOperationDescription, ULONG aNextOperationsWeight)
842	{
843	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
844
845	if (mCanceled)
846	return E_FAIL;
847	AssertReturn(!mCompleted, E_FAIL);
848	AssertReturn(m_ulCurrentOperation + 1 < m_cOperations, E_FAIL);
849
850	++m_ulCurrentOperation;
851	m_ulOperationsCompletedWeight += m_ulCurrentOperationWeight;
852
853	m_operationDescription = aNextOperationDescription;
854	m_ulCurrentOperationWeight = aNextOperationsWeight;
855	m_ulOperationPercent = 0;
856
857	LogThisFunc(("%s: aNextOperationsWeight = %d; m_ulCurrentOperation is now %d, m_ulOperationsCompletedWeight is now %d\n",
858	m_operationDescription.c_str(), aNextOperationsWeight, m_ulCurrentOperation, m_ulOperationsCompletedWeight));
859
860	/* wake up all waiting threads */
861	if (mWaitersCount > 0)
862	RTSemEventMultiSignal(mCompletedSem);
863
864	ULONG actualPercent = 0;
865	getPercent(&actualPercent);
866	fireProgressPercentageChangedEvent(pEventSource, mId.toUtf16().raw(), actualPercent);
867
868	return S_OK;
869	}
870
871	/**
872	* @note XPCOM: when this method is not called on the main XPCOM thread, it
873	* simply blocks the thread until mCompletedSem is signalled. If the
874	* thread has its own event queue (hmm, what for?) that it must run, then
875	* calling this method will definitely freeze event processing.
876	*/
877	HRESULT Progress::waitForCompletion(LONG aTimeout)
878	{
879	LogFlowThisFuncEnter();
880	LogFlowThisFunc(("aTimeout=%d\n", aTimeout));
881
882	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
883
884	/* if we're already completed, take a shortcut */
885	if (!mCompleted)
886	{
887	int vrc = VINF_SUCCESS;
888	bool fForever = aTimeout < 0;
889	int64_t timeLeft = aTimeout;
890	int64_t lastTime = RTTimeMilliTS();
891
892	while (!mCompleted && (fForever \|\| timeLeft > 0))
893	{
894	mWaitersCount++;
895	alock.release();
896	vrc = RTSemEventMultiWait(mCompletedSem,
897	fForever ? RT_INDEFINITE_WAIT : (RTMSINTERVAL)timeLeft);
898	alock.acquire();
899	mWaitersCount--;
900
901	/* the last waiter resets the semaphore */
902	if (mWaitersCount == 0)
903	RTSemEventMultiReset(mCompletedSem);
904
905	if (RT_FAILURE(vrc) && vrc != VERR_TIMEOUT)
906	break;
907
908	if (!fForever)
909	{
910	int64_t now = RTTimeMilliTS();
911	timeLeft -= now - lastTime;
912	lastTime = now;
913	}
914	}
915
916	if (RT_FAILURE(vrc) && vrc != VERR_TIMEOUT)
917	return setError(VBOX_E_IPRT_ERROR,
918	tr("Failed to wait for the task completion (%Rrc)"),
919	vrc);
920	}
921
922	LogFlowThisFuncLeave();
923
924	return S_OK;
925	}
926
927	/**
928	* @note XPCOM: when this method is not called on the main XPCOM thread, it
929	* simply blocks the thread until mCompletedSem is signalled. If the
930	* thread has its own event queue (hmm, what for?) that it must run, then
931	* calling this method will definitely freeze event processing.
932	*/
933	HRESULT Progress::waitForOperationCompletion(ULONG aOperation, LONG aTimeout)
934
935	{
936	LogFlowThisFuncEnter();
937	LogFlowThisFunc(("aOperation=%d, aTimeout=%d\n", aOperation, aTimeout));
938
939	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
940
941	CheckComArgExpr(aOperation, aOperation < m_cOperations);
942
943	/* if we're already completed or if the given operation is already done,
944	* then take a shortcut */
945	if ( !mCompleted
946	&& aOperation >= m_ulCurrentOperation)
947	{
948	int vrc = VINF_SUCCESS;
949	bool fForever = aTimeout < 0;
950	int64_t timeLeft = aTimeout;
951	int64_t lastTime = RTTimeMilliTS();
952
953	while ( !mCompleted && aOperation >= m_ulCurrentOperation
954	&& (fForever \|\| timeLeft > 0))
955	{
956	mWaitersCount ++;
957	alock.release();
958	vrc = RTSemEventMultiWait(mCompletedSem,
959	fForever ? RT_INDEFINITE_WAIT : (unsigned) timeLeft);
960	alock.acquire();
961	mWaitersCount--;
962
963	/* the last waiter resets the semaphore */
964	if (mWaitersCount == 0)
965	RTSemEventMultiReset(mCompletedSem);
966
967	if (RT_FAILURE(vrc) && vrc != VERR_TIMEOUT)
968	break;
969
970	if (!fForever)
971	{
972	int64_t now = RTTimeMilliTS();
973	timeLeft -= now - lastTime;
974	lastTime = now;
975	}
976	}
977
978	if (RT_FAILURE(vrc) && vrc != VERR_TIMEOUT)
979	return setError(E_FAIL,
980	tr("Failed to wait for the operation completion (%Rrc)"),
981	vrc);
982	}
983
984	LogFlowThisFuncLeave();
985
986	return S_OK;
987	}
988
989	HRESULT Progress::waitForAsyncProgressCompletion(const ComPtr<IProgress> &aPProgressAsync)
990	{
991	LogFlowThisFuncEnter();
992
993	/* Note: we don't lock here, cause we just using public methods. */
994
995	HRESULT rc = S_OK;
996	BOOL fCancelable = FALSE;
997	BOOL fCompleted = FALSE;
998	BOOL fCanceled = FALSE;
999	ULONG prevPercent = UINT32_MAX;
1000	ULONG currentPercent = 0;
1001	ULONG cOp = 0;
1002	/* Is the async process cancelable? */
1003	rc = aPProgressAsync->COMGETTER(Cancelable)(&fCancelable);
1004	if (FAILED(rc)) return rc;
1005	/* Loop as long as the sync process isn't completed. */
1006	while (SUCCEEDED(aPProgressAsync->COMGETTER(Completed(&fCompleted))))
1007	{
1008	/* We can forward any cancel request to the async process only when
1009	* it is cancelable. */
1010	if (fCancelable)
1011	{
1012	rc = COMGETTER(Canceled)(&fCanceled);
1013	if (FAILED(rc)) return rc;
1014	if (fCanceled)
1015	{
1016	rc = aPProgressAsync->Cancel();
1017	if (FAILED(rc)) return rc;
1018	}
1019	}
1020	/* Even if the user canceled the process, we have to wait until the
1021	async task has finished his work (cleanup and such). Otherwise there
1022	will be sync trouble (still wrong state, dead locks, ...) on the
1023	used objects. So just do nothing, but wait for the complete
1024	notification. */
1025	if (!fCanceled)
1026	{
1027	/* Check if the current operation has changed. It is also possible that
1028	* in the meantime more than one async operation was finished. So we
1029	* have to loop as long as we reached the same operation count. */
1030	ULONG curOp;
1031	for (;;)
1032	{
1033	rc = aPProgressAsync->COMGETTER(Operation(&curOp));
1034	if (FAILED(rc)) return rc;
1035	if (cOp != curOp)
1036	{
1037	Bstr bstr;
1038	ULONG currentWeight;
1039	rc = aPProgressAsync->COMGETTER(OperationDescription(bstr.asOutParam()));
1040	if (FAILED(rc)) return rc;
1041	rc = aPProgressAsync->COMGETTER(OperationWeight(&currentWeight));
1042	if (FAILED(rc)) return rc;
1043	rc = SetNextOperation(bstr.raw(), currentWeight);
1044	if (FAILED(rc)) return rc;
1045	++cOp;
1046	}
1047	else
1048	break;
1049	}
1050
1051	rc = aPProgressAsync->COMGETTER(OperationPercent(&currentPercent));
1052	if (FAILED(rc)) return rc;
1053	if (currentPercent != prevPercent)
1054	{
1055	prevPercent = currentPercent;
1056	rc = SetCurrentOperationProgress(currentPercent);
1057	if (FAILED(rc)) return rc;
1058	}
1059	}
1060	if (fCompleted)
1061	break;
1062
1063	/* Make sure the loop is not too tight */
1064	rc = aPProgressAsync->WaitForCompletion(100);
1065	if (FAILED(rc)) return rc;
1066	}
1067
1068	LogFlowThisFuncLeave();
1069
1070	return rc;
1071	}
1072
1073	HRESULT Progress::cancel()
1074	{
1075	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
1076
1077	if (!mCancelable)
1078	return setError(VBOX_E_INVALID_OBJECT_STATE,
1079	tr("Operation cannot be canceled"));
1080
1081	if (!mCanceled)
1082	{
1083	LogThisFunc(("Canceling\n"));
1084	mCanceled = TRUE;
1085	if (m_pfnCancelCallback)
1086	m_pfnCancelCallback(m_pvCancelUserArg);
1087
1088	}
1089	else
1090	LogThisFunc(("Already canceled\n"));
1091
1092	return S_OK;
1093	}
1094
1095	HRESULT Progress::getEventSource(ComPtr<IEventSource> &aEventSource)
1096	{
1097	/* event source is const, no need to lock */
1098	pEventSource.queryInterfaceTo(aEventSource.asOutParam());
1099	return S_OK;
1100	}
1101
1102	// private internal helpers
1103	/////////////////////////////////////////////////////////////////////////////
1104
1105	/**
1106	* Internal helper to compute the total percent value based on the member values and
1107	* returns it as a "double". This is used both by GetPercent (which returns it as a
1108	* rounded ULONG) and GetTimeRemaining().
1109	*
1110	* Requires locking by the caller!
1111	*
1112	* @return fractional percentage as a double value.
1113	*/
1114	double Progress::i_calcTotalPercent()
1115	{
1116	// avoid division by zero
1117	if (m_ulTotalOperationsWeight == 0)
1118	return 0.0;
1119
1120	double dPercent = ( (double)m_ulOperationsCompletedWeight // weight of operations that have been completed
1121	+ ((double)m_ulOperationPercent *
1122	(double)m_ulCurrentOperationWeight / 100.0) // plus partial weight of the current operation
1123	) * 100.0 / (double)m_ulTotalOperationsWeight;
1124
1125	return dPercent;
1126	}
1127
1128	/**
1129	* Internal helper for automatically timing out the operation.
1130	*
1131	* The caller must hold the object write lock.
1132	*/
1133	void Progress::i_checkForAutomaticTimeout(void)
1134	{
1135	AssertReturnVoid(isWriteLockOnCurrentThread());
1136
1137	if ( m_cMsTimeout
1138	&& mCancelable
1139	&& !mCanceled
1140	&& RTTimeMilliTS() - m_ullTimestamp > m_cMsTimeout)
1141	Cancel();
1142	}

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source: vbox/trunk/src/VBox/Main/src-all/ProgressImpl.cpp@ 72057

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