/**
* Termination request.
*
* @return true if we're ok with shutting down now, false if we're not.
* @param fOptions Flags.
*/
bool org_virtualbox_SupDrv::terminate(IOOptionBits fOptions)
{
bool fRc;
LogFlow(("org_virtualbox_SupDrv::terminate: reference_count=%d g_cSessions=%d (fOptions=%#x)\n",
KMOD_INFO_NAME.reference_count, ASMAtomicUoReadS32(&g_cSessions), fOptions));
if ( KMOD_INFO_NAME.reference_count != 0
|| ASMAtomicUoReadS32(&g_cSessions))
fRc = false;
else
fRc = IOService::terminate(fOptions);
LogFlow(("org_virtualbox_SupDrv::terminate: returns %d\n", fRc));
return fRc;
}
/**
* Yield the critical section if someone is waiting on it.
*
* When yielding, we'll leave the critical section and try to make sure the
* other waiting threads get a chance of entering before we reclaim it.
*
* @retval true if yielded.
* @retval false if not yielded.
* @param pCritSect The critical section.
*/
VMMR3DECL(bool) PDMR3CritSectYield(PPDMCRITSECT pCritSect)
{
AssertPtrReturn(pCritSect, false);
AssertReturn(pCritSect->s.Core.u32Magic == RTCRITSECT_MAGIC, false);
Assert(pCritSect->s.Core.NativeThreadOwner == RTThreadNativeSelf());
Assert(!(pCritSect->s.Core.fFlags & RTCRITSECT_FLAGS_NOP));
/* No recursion allowed here. */
int32_t const cNestings = pCritSect->s.Core.cNestings;
AssertReturn(cNestings == 1, false);
int32_t const cLockers = ASMAtomicReadS32(&pCritSect->s.Core.cLockers);
if (cLockers < cNestings)
return false;
#ifdef PDMCRITSECT_STRICT
RTLOCKVALSRCPOS const SrcPos = pCritSect->s.Core.pValidatorRec->SrcPos;
#endif
PDMCritSectLeave(pCritSect);
/*
* If we're lucky, then one of the waiters has entered the lock already.
* We spin a little bit in hope for this to happen so we can avoid the
* yield detour.
*/
if (ASMAtomicUoReadS32(&pCritSect->s.Core.cNestings) == 0)
{
int cLoops = 20;
while ( cLoops > 0
&& ASMAtomicUoReadS32(&pCritSect->s.Core.cNestings) == 0
&& ASMAtomicUoReadS32(&pCritSect->s.Core.cLockers) >= 0)
{
ASMNopPause();
cLoops--;
}
if (cLoops == 0)
RTThreadYield();
}
#ifdef PDMCRITSECT_STRICT
int rc = PDMCritSectEnterDebug(pCritSect, VERR_IGNORED,
SrcPos.uId, SrcPos.pszFile, SrcPos.uLine, SrcPos.pszFunction);
#else
int rc = PDMCritSectEnter(pCritSect, VERR_IGNORED);
#endif
AssertLogRelRC(rc);
return true;
}
/**
* Locks the stuff for reading.
*
* This is just cheap stuff to make sure the caller is doing the right thing.
*/
DECLINLINE(void) rtstrFormatTypeReadLock(void)
{
#if defined(RTSTRFORMATTYPE_WITH_LOCKING)
if (RT_UNLIKELY(ASMAtomicIncS32(&g_i32Spinlock) < 0))
{
unsigned volatile i;
AssertFailed();
for (i = 0;; i++)
if (ASMAtomicUoReadS32(&g_i32Spinlock) > 0)
break;
}
#endif
}
/**
* Checks whether the VBoxNetAdp wossname can be unloaded.
*
* This will return false if someone is currently using the module.
*
* @returns true if it's relatively safe to unload it, otherwise false.
* @param pGlobals Pointer to the globals.
*/
DECLHIDDEN(bool) vboxNetAdpCanUnload(PVBOXNETADPGLOBALS pGlobals)
{
bool fRc = true; /* Assume it can be unloaded. */
unsigned i;
for (i = 0; i < RT_ELEMENTS(pGlobals->aAdapters); i++)
{
PVBOXNETADP pThis = &pGlobals->aAdapters[i];
if (vboxNetAdpGetStateWithLock(&pGlobals->aAdapters[i]) >= kVBoxNetAdpState_Connected)
{
fRc = false;
break; /* We already know the answer. */
}
}
return fRc && ASMAtomicUoReadS32((int32_t volatile *)&pGlobals->cFactoryRefs) <= 0;
}
DECLINLINE(int) rtSemEventLnxMultiWait(struct RTSEMEVENTMULTIINTERNAL *pThis, uint32_t fFlags, uint64_t uTimeout,
PCRTLOCKVALSRCPOS pSrcPos)
{
/*
* Validate input.
*/
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC, VERR_INVALID_HANDLE);
AssertReturn(RTSEMWAIT_FLAGS_ARE_VALID(fFlags), VERR_INVALID_PARAMETER);
/*
* Quickly check whether it's signaled.
*/
int32_t iCur = ASMAtomicUoReadS32(&pThis->iState);
Assert(iCur == 0 || iCur == -1 || iCur == 1);
if (iCur == -1)
return VINF_SUCCESS;
/*
* Check and convert the timeout value.
*/
struct timespec ts;
struct timespec *pTimeout = NULL;
uint64_t u64Deadline = 0; /* shut up gcc */
if (!(fFlags & RTSEMWAIT_FLAGS_INDEFINITE))
{
/* If the timeout is zero, then we're done. */
if (!uTimeout)
return VERR_TIMEOUT;
/* Convert it to a deadline + interval timespec. */
if (fFlags & RTSEMWAIT_FLAGS_MILLISECS)
uTimeout = uTimeout < UINT64_MAX / UINT32_C(1000000) * UINT32_C(1000000)
? uTimeout * UINT32_C(1000000)
: UINT64_MAX;
if (uTimeout != UINT64_MAX) /* unofficial way of indicating an indefinite wait */
{
if (fFlags & RTSEMWAIT_FLAGS_RELATIVE)
u64Deadline = RTTimeSystemNanoTS() + uTimeout;
else
{
uint64_t u64Now = RTTimeSystemNanoTS();
if (uTimeout <= u64Now)
return VERR_TIMEOUT;
u64Deadline = uTimeout;
uTimeout -= u64Now;
}
if ( sizeof(ts.tv_sec) >= sizeof(uint64_t)
|| uTimeout <= UINT64_C(1000000000) * UINT32_MAX)
{
ts.tv_nsec = uTimeout % UINT32_C(1000000000);
ts.tv_sec = uTimeout / UINT32_C(1000000000);
pTimeout = &ts;
}
}
}
/*
* The wait loop.
*/
#ifdef RTSEMEVENTMULTI_STRICT
RTTHREAD hThreadSelf = RTThreadSelfAutoAdopt();
#else
RTTHREAD hThreadSelf = RTThreadSelf();
#endif
for (unsigned i = 0;; i++)
{
/*
* Start waiting. We only account for there being or having been
* threads waiting on the semaphore to keep things simple.
*/
iCur = ASMAtomicUoReadS32(&pThis->iState);
Assert(iCur == 0 || iCur == -1 || iCur == 1);
if ( iCur == 1
|| ASMAtomicCmpXchgS32(&pThis->iState, 1, 0))
{
/* adjust the relative timeout */
if (pTimeout)
{
int64_t i64Diff = u64Deadline - RTTimeSystemNanoTS();
if (i64Diff < 1000)
return VERR_TIMEOUT;
ts.tv_sec = (uint64_t)i64Diff / UINT32_C(1000000000);
ts.tv_nsec = (uint64_t)i64Diff % UINT32_C(1000000000);
}
#ifdef RTSEMEVENTMULTI_STRICT
if (pThis->fEverHadSignallers)
{
int rc9 = RTLockValidatorRecSharedCheckBlocking(&pThis->Signallers, hThreadSelf, pSrcPos, false,
uTimeout / UINT32_C(1000000), RTTHREADSTATE_EVENT_MULTI, true);
if (RT_FAILURE(rc9))
return rc9;
}
#endif
RTThreadBlocking(hThreadSelf, RTTHREADSTATE_EVENT_MULTI, true);
long rc = sys_futex(&pThis->iState, FUTEX_WAIT, 1, pTimeout, NULL, 0);
RTThreadUnblocked(hThreadSelf, RTTHREADSTATE_EVENT_MULTI);
if (RT_UNLIKELY(pThis->u32Magic != RTSEMEVENTMULTI_MAGIC))
return VERR_SEM_DESTROYED;
if (rc == 0)
return VINF_SUCCESS;
/*
* Act on the wakup code.
*/
if (rc == -ETIMEDOUT)
{
/** @todo something is broken here. shows up every now and again in the ata
* code. Should try to run the timeout against RTTimeMilliTS to
* check that it's doing the right thing... */
Assert(pTimeout);
return VERR_TIMEOUT;
}
if (rc == -EWOULDBLOCK)
/* retry, the value changed. */;
else if (rc == -EINTR)
{
if (fFlags & RTSEMWAIT_FLAGS_NORESUME)
return VERR_INTERRUPTED;
}
else
{
/* this shouldn't happen! */
AssertMsgFailed(("rc=%ld errno=%d\n", rc, errno));
return RTErrConvertFromErrno(rc);
}
}
else if (iCur == -1)
return VINF_SUCCESS;
}
}
RTDECL(int) RTFileAioCtxWait(RTFILEAIOCTX hAioCtx, size_t cMinReqs, RTMSINTERVAL cMillies,
PRTFILEAIOREQ pahReqs, size_t cReqs, uint32_t *pcReqs)
{
/*
* Validate the parameters, making sure to always set pcReqs.
*/
AssertPtrReturn(pcReqs, VERR_INVALID_POINTER);
*pcReqs = 0; /* always set */
PRTFILEAIOCTXINTERNAL pCtxInt = hAioCtx;
RTFILEAIOCTX_VALID_RETURN(pCtxInt);
AssertPtrReturn(pahReqs, VERR_INVALID_POINTER);
AssertReturn(cReqs != 0, VERR_INVALID_PARAMETER);
AssertReturn(cReqs >= cMinReqs, VERR_OUT_OF_RANGE);
/*
* Can't wait if there are no requests around.
*/
if ( RT_UNLIKELY(ASMAtomicUoReadS32(&pCtxInt->cRequests) == 0)
&& !(pCtxInt->fFlags & RTFILEAIOCTX_FLAGS_WAIT_WITHOUT_PENDING_REQUESTS))
return VERR_FILE_AIO_NO_REQUEST;
/* Wait for at least one. */
if (!cMinReqs)
cMinReqs = 1;
/*
* Loop until we're woken up, hit an error (incl timeout), or
* have collected the desired number of requests.
*/
int rc = VINF_SUCCESS;
int cRequestsCompleted = 0;
while ( !pCtxInt->fWokenUp
&& cMinReqs > 0)
{
uint64_t StartNanoTS = 0;
DWORD dwTimeout = cMillies == RT_INDEFINITE_WAIT ? INFINITE : cMillies;
DWORD cbTransfered;
LPOVERLAPPED pOverlapped;
ULONG_PTR lCompletionKey;
BOOL fSucceeded;
if (cMillies != RT_INDEFINITE_WAIT)
StartNanoTS = RTTimeNanoTS();
ASMAtomicXchgBool(&pCtxInt->fWaiting, true);
fSucceeded = GetQueuedCompletionStatus(pCtxInt->hIoCompletionPort,
&cbTransfered,
&lCompletionKey,
&pOverlapped,
dwTimeout);
ASMAtomicXchgBool(&pCtxInt->fWaiting, false);
if ( !fSucceeded
&& !pOverlapped)
{
/* The call failed to dequeue a completion packet, includes VERR_TIMEOUT */
rc = RTErrConvertFromWin32(GetLastError());
break;
}
/* Check if we got woken up. */
if (lCompletionKey == AIO_CONTEXT_WAKEUP_EVENT)
{
Assert(fSucceeded && !pOverlapped);
break;
}
/* A request completed. */
PRTFILEAIOREQINTERNAL pReqInt = OVERLAPPED_2_RTFILEAIOREQINTERNAL(pOverlapped);
AssertPtr(pReqInt);
Assert(pReqInt->u32Magic == RTFILEAIOREQ_MAGIC);
/* Mark the request as finished. */
RTFILEAIOREQ_SET_STATE(pReqInt, COMPLETED);
pReqInt->cbTransfered = cbTransfered;
if (fSucceeded)
pReqInt->Rc = VINF_SUCCESS;
else
{
DWORD errCode = GetLastError();
pReqInt->Rc = RTErrConvertFromWin32(errCode);
if (pReqInt->Rc == VERR_UNRESOLVED_ERROR)
LogRel(("AIO/win: Request %#p returned rc=%Rrc (native %u\n)", pReqInt, pReqInt->Rc, errCode));
}
pahReqs[cRequestsCompleted++] = (RTFILEAIOREQ)pReqInt;
/* Update counter. */
cMinReqs--;
if (cMillies != RT_INDEFINITE_WAIT)
{
/* Recalculate timeout. */
uint64_t NanoTS = RTTimeNanoTS();
uint64_t cMilliesElapsed = (NanoTS - StartNanoTS) / 1000000;
if (cMilliesElapsed < cMillies)
cMillies -= cMilliesElapsed;
else
cMillies = 0;
}
}
/*
* Update the context state and set the return value.
*/
*pcReqs = cRequestsCompleted;
ASMAtomicSubS32(&pCtxInt->cRequests, cRequestsCompleted);
/*
* Clear the wakeup flag and set rc.
*/
bool fWokenUp = ASMAtomicXchgBool(&pCtxInt->fWokenUp, false);
if ( fWokenUp
&& RT_SUCCESS(rc))
rc = VERR_INTERRUPTED;
return rc;
}
RTDECL(int) RTFileAioCtxSubmit(RTFILEAIOCTX hAioCtx, PRTFILEAIOREQ pahReqs, size_t cReqs)
{
int rc = VINF_SUCCESS;
PRTFILEAIOCTXINTERNAL pCtxInt = hAioCtx;
/* Parameter checks */
AssertPtrReturn(pCtxInt, VERR_INVALID_HANDLE);
AssertReturn(cReqs != 0, VERR_INVALID_POINTER);
AssertPtrReturn(pahReqs, VERR_INVALID_PARAMETER);
rtFileAioCtxDump(pCtxInt);
/* Check that we don't exceed the limit */
if (ASMAtomicUoReadS32(&pCtxInt->cRequests) + cReqs > pCtxInt->cMaxRequests)
return VERR_FILE_AIO_LIMIT_EXCEEDED;
PRTFILEAIOREQINTERNAL pHead = NULL;
do
{
int rcPosix = 0;
size_t cReqsSubmit = 0;
size_t i = 0;
PRTFILEAIOREQINTERNAL pReqInt;
while ( (i < cReqs)
&& (i < AIO_LISTIO_MAX))
{
pReqInt = pahReqs[i];
if (RTFILEAIOREQ_IS_NOT_VALID(pReqInt))
{
/* Undo everything and stop submitting. */
for (size_t iUndo = 0; iUndo < i; iUndo++)
{
pReqInt = pahReqs[iUndo];
RTFILEAIOREQ_SET_STATE(pReqInt, PREPARED);
pReqInt->pCtxInt = NULL;
/* Unlink from the list again. */
PRTFILEAIOREQINTERNAL pNext, pPrev;
pNext = pReqInt->pNext;
pPrev = pReqInt->pPrev;
if (pNext)
pNext->pPrev = pPrev;
if (pPrev)
pPrev->pNext = pNext;
else
pHead = pNext;
}
rc = VERR_INVALID_HANDLE;
break;
}
pReqInt->pCtxInt = pCtxInt;
if (pReqInt->fFlush)
break;
/* Link them together. */
pReqInt->pNext = pHead;
if (pHead)
pHead->pPrev = pReqInt;
pReqInt->pPrev = NULL;
pHead = pReqInt;
RTFILEAIOREQ_SET_STATE(pReqInt, SUBMITTED);
cReqsSubmit++;
i++;
}
if (cReqsSubmit)
{
rcPosix = lio_listio(LIO_NOWAIT, (struct aiocb **)pahReqs, cReqsSubmit, NULL);
if (RT_UNLIKELY(rcPosix < 0))
{
size_t cReqsSubmitted = cReqsSubmit;
if (errno == EAGAIN)
rc = VERR_FILE_AIO_INSUFFICIENT_RESSOURCES;
else
rc = RTErrConvertFromErrno(errno);
/* Check which ones were not submitted. */
for (i = 0; i < cReqsSubmit; i++)
{
pReqInt = pahReqs[i];
rcPosix = aio_error(&pReqInt->AioCB);
if ((rcPosix != EINPROGRESS) && (rcPosix != 0))
{
cReqsSubmitted--;
#if defined(RT_OS_DARWIN) || defined(RT_OS_FREEBSD)
if (errno == EINVAL)
#else
if (rcPosix == EINVAL)
#endif
{
/* Was not submitted. */
RTFILEAIOREQ_SET_STATE(pReqInt, PREPARED);
}
else
{
/* An error occurred. */
RTFILEAIOREQ_SET_STATE(pReqInt, COMPLETED);
/*
* Looks like Apple and glibc interpret the standard in different ways.
* glibc returns the error code which would be in errno but Apple returns
* -1 and sets errno to the appropriate value
*/
#if defined(RT_OS_DARWIN) || defined(RT_OS_FREEBSD)
Assert(rcPosix == -1);
pReqInt->Rc = RTErrConvertFromErrno(errno);
#elif defined(RT_OS_LINUX)
pReqInt->Rc = RTErrConvertFromErrno(rcPosix);
#endif
pReqInt->cbTransfered = 0;
}
/* Unlink from the list. */
PRTFILEAIOREQINTERNAL pNext, pPrev;
pNext = pReqInt->pNext;
pPrev = pReqInt->pPrev;
if (pNext)
pNext->pPrev = pPrev;
if (pPrev)
pPrev->pNext = pNext;
else
pHead = pNext;
pReqInt->pNext = NULL;
pReqInt->pPrev = NULL;
}
}
ASMAtomicAddS32(&pCtxInt->cRequests, cReqsSubmitted);
AssertMsg(pCtxInt->cRequests >= 0, ("Adding requests resulted in overflow\n"));
break;
}
ASMAtomicAddS32(&pCtxInt->cRequests, cReqsSubmit);
AssertMsg(pCtxInt->cRequests >= 0, ("Adding requests resulted in overflow\n"));
cReqs -= cReqsSubmit;
pahReqs += cReqsSubmit;
}
/*
* Check if we have a flush request now.
* If not we hit the AIO_LISTIO_MAX limit
* and will continue submitting requests
* above.
*/
if (cReqs && RT_SUCCESS_NP(rc))
{
pReqInt = pahReqs[0];
if (pReqInt->fFlush)
{
/*
* lio_listio does not work with flush requests so
* we have to use aio_fsync directly.
*/
rcPosix = aio_fsync(O_SYNC, &pReqInt->AioCB);
if (RT_UNLIKELY(rcPosix < 0))
{
if (errno == EAGAIN)
{
rc = VERR_FILE_AIO_INSUFFICIENT_RESSOURCES;
RTFILEAIOREQ_SET_STATE(pReqInt, PREPARED);
}
else
{
rc = RTErrConvertFromErrno(errno);
RTFILEAIOREQ_SET_STATE(pReqInt, COMPLETED);
pReqInt->Rc = rc;
}
pReqInt->cbTransfered = 0;
break;
}
/* Link them together. */
pReqInt->pNext = pHead;
if (pHead)
pHead->pPrev = pReqInt;
pReqInt->pPrev = NULL;
pHead = pReqInt;
RTFILEAIOREQ_SET_STATE(pReqInt, SUBMITTED);
ASMAtomicIncS32(&pCtxInt->cRequests);
AssertMsg(pCtxInt->cRequests >= 0, ("Adding requests resulted in overflow\n"));
cReqs--;
pahReqs++;
}
}
} while ( cReqs
&& RT_SUCCESS_NP(rc));
if (pHead)
{
/*
* Forward successfully submitted requests to the thread waiting for requests.
* We search for a free slot first and if we don't find one
* we will grab the first one and append our list to the existing entries.
*/
unsigned iSlot = 0;
while ( (iSlot < RT_ELEMENTS(pCtxInt->apReqsNewHead))
&& !ASMAtomicCmpXchgPtr(&pCtxInt->apReqsNewHead[iSlot], pHead, NULL))
iSlot++;
if (iSlot == RT_ELEMENTS(pCtxInt->apReqsNewHead))
{
/* Nothing found. */
PRTFILEAIOREQINTERNAL pOldHead = ASMAtomicXchgPtrT(&pCtxInt->apReqsNewHead[0], NULL, PRTFILEAIOREQINTERNAL);
/* Find the end of the current head and link the old list to the current. */
PRTFILEAIOREQINTERNAL pTail = pHead;
while (pTail->pNext)
pTail = pTail->pNext;
pTail->pNext = pOldHead;
ASMAtomicWritePtr(&pCtxInt->apReqsNewHead[0], pHead);
}
/* Set the internal wakeup flag and wakeup the thread if possible. */
bool fWokenUp = ASMAtomicXchgBool(&pCtxInt->fWokenUpInternal, true);
if (!fWokenUp)
rtFileAioCtxWakeup(pCtxInt);
}
rtFileAioCtxDump(pCtxInt);
return rc;
}
RTDECL(int) RTFileAioCtxWait(RTFILEAIOCTX hAioCtx, size_t cMinReqs, RTMSINTERVAL cMillies,
PRTFILEAIOREQ pahReqs, size_t cReqs, uint32_t *pcReqs)
{
/*
* Validate the parameters, making sure to always set pcReqs.
*/
AssertPtrReturn(pcReqs, VERR_INVALID_POINTER);
*pcReqs = 0; /* always set */
PRTFILEAIOCTXINTERNAL pCtxInt = hAioCtx;
RTFILEAIOCTX_VALID_RETURN(pCtxInt);
AssertPtrReturn(pahReqs, VERR_INVALID_POINTER);
AssertReturn(cReqs != 0, VERR_INVALID_PARAMETER);
AssertReturn(cReqs >= cMinReqs, VERR_OUT_OF_RANGE);
/*
* Can't wait if there are not requests around.
*/
if ( RT_UNLIKELY(ASMAtomicUoReadS32(&pCtxInt->cRequests) == 0)
&& !(pCtxInt->fFlags & RTFILEAIOCTX_FLAGS_WAIT_WITHOUT_PENDING_REQUESTS))
return VERR_FILE_AIO_NO_REQUEST;
/*
* Convert the timeout if specified.
*/
struct timespec *pTimeout = NULL;
struct timespec Timeout = {0,0};
uint64_t StartNanoTS = 0;
if (cMillies != RT_INDEFINITE_WAIT)
{
Timeout.tv_sec = cMillies / 1000;
Timeout.tv_nsec = cMillies % 1000 * 1000000;
pTimeout = &Timeout;
StartNanoTS = RTTimeNanoTS();
}
/* Wait for at least one. */
if (!cMinReqs)
cMinReqs = 1;
/* For the wakeup call. */
Assert(pCtxInt->hThreadWait == NIL_RTTHREAD);
ASMAtomicWriteHandle(&pCtxInt->hThreadWait, RTThreadSelf());
/*
* Loop until we're woken up, hit an error (incl timeout), or
* have collected the desired number of requests.
*/
int rc = VINF_SUCCESS;
int cRequestsCompleted = 0;
while (!pCtxInt->fWokenUp)
{
LNXKAIOIOEVENT aPortEvents[AIO_MAXIMUM_REQUESTS_PER_CONTEXT];
int cRequestsToWait = RT_MIN(cReqs, AIO_MAXIMUM_REQUESTS_PER_CONTEXT);
ASMAtomicXchgBool(&pCtxInt->fWaiting, true);
rc = rtFileAsyncIoLinuxGetEvents(pCtxInt->AioContext, cMinReqs, cRequestsToWait, &aPortEvents[0], pTimeout);
ASMAtomicXchgBool(&pCtxInt->fWaiting, false);
if (RT_FAILURE(rc))
break;
uint32_t const cDone = rc;
rc = VINF_SUCCESS;
/*
* Process received events / requests.
*/
for (uint32_t i = 0; i < cDone; i++)
{
/*
* The iocb is the first element in our request structure.
* So we can safely cast it directly to the handle (see above)
*/
PRTFILEAIOREQINTERNAL pReqInt = (PRTFILEAIOREQINTERNAL)aPortEvents[i].pIoCB;
AssertPtr(pReqInt);
Assert(pReqInt->u32Magic == RTFILEAIOREQ_MAGIC);
/** @todo aeichner: The rc field contains the result code
* like you can find in errno for the normal read/write ops.
* But there is a second field called rc2. I don't know the
* purpose for it yet.
*/
if (RT_UNLIKELY(aPortEvents[i].rc < 0))
pReqInt->Rc = RTErrConvertFromErrno(-aPortEvents[i].rc); /* Convert to positive value. */
else
{
pReqInt->Rc = VINF_SUCCESS;
pReqInt->cbTransfered = aPortEvents[i].rc;
}
/* Mark the request as finished. */
RTFILEAIOREQ_SET_STATE(pReqInt, COMPLETED);
pahReqs[cRequestsCompleted++] = (RTFILEAIOREQ)pReqInt;
}
/*
* Done Yet? If not advance and try again.
*/
if (cDone >= cMinReqs)
break;
cMinReqs -= cDone;
cReqs -= cDone;
if (cMillies != RT_INDEFINITE_WAIT)
{
/* The API doesn't return ETIMEDOUT, so we have to fix that ourselves. */
uint64_t NanoTS = RTTimeNanoTS();
uint64_t cMilliesElapsed = (NanoTS - StartNanoTS) / 1000000;
if (cMilliesElapsed >= cMillies)
{
rc = VERR_TIMEOUT;
break;
}
/* The syscall supposedly updates it, but we're paranoid. :-) */
Timeout.tv_sec = (cMillies - (RTMSINTERVAL)cMilliesElapsed) / 1000;
Timeout.tv_nsec = (cMillies - (RTMSINTERVAL)cMilliesElapsed) % 1000 * 1000000;
}
}
/*
* Update the context state and set the return value.
*/
*pcReqs = cRequestsCompleted;
ASMAtomicSubS32(&pCtxInt->cRequests, cRequestsCompleted);
Assert(pCtxInt->hThreadWait == RTThreadSelf());
ASMAtomicWriteHandle(&pCtxInt->hThreadWait, NIL_RTTHREAD);
/*
* Clear the wakeup flag and set rc.
*/
if ( pCtxInt->fWokenUp
&& RT_SUCCESS(rc))
{
ASMAtomicXchgBool(&pCtxInt->fWokenUp, false);
rc = VERR_INTERRUPTED;
}
return rc;
}