QCDiskQueue::Status
QCDiskQueue::Queue::GrowFile(
QCDiskQueue::FileIdx inFileIdx,
off_t inTargetSz)
{
QCStMutexLocker theLock(mMutex);
if (! mRunFlag) {
return Status(kErrorQueueStopped);
}
if (inFileIdx < 0 || inFileIdx >= mFileCount || mFdPtr[inFileIdx] < 0) {
return Status(kErrorFileIdxOutOfRange);
}
const int64_t theOldSz = mFileInfoPtr[inFileIdx].mLastBlockIdx * mBlockSize;
const int64_t theBlkIdx =
(int64_t(inTargetSz > 0 ? inTargetSz : theOldSz) + mBlockSize - 1) / mBlockSize;
if (theBlkIdx >= (int64_t(1) << kBlockBitCount)) {
return Status(kErrorSpaceAlloc);
}
mFileInfoPtr[inFileIdx].mSpaceAllocPendingFlag = inTargetSz > 0 &&
inTargetSz > theOldSz;
mFileInfoPtr[inFileIdx].mLastBlockIdx = theBlkIdx;
mFileInfoPtr[inFileIdx].mSpaceAllocPendingFlag = true;
return Status(kErrorNone);
}
bool ZCnd_boost::Wait(boost::mutex& iMtx, double iTimeout)
{
boost::mutex::scoped_lock theLock(iMtx, boost::adopt_lock);
return condition_variable::timed_wait(
theLock, boost::posix_time::microseconds(iTimeout * 1e6));
}
void Remove(
QCThread& inThread)
{
QCStMutexLocker theLock(mMutex);
ThreadList::Remove(inThread);
mCount--;
}
//**********************************************************************************************
// WCMRAudioDeviceManager::~WCMRAudioDeviceManager
//
//! It clears the device list, releasing each of the device.
//!
//! \param none
//!
//! \return Nothing.
//!
//**********************************************************************************************
WCMRAudioDeviceManager::~WCMRAudioDeviceManager()
{
AUTO_FUNC_DEBUG;
std::cout << "API::Destroying AudioDeviceManager " << std::endl;
try
{
// clean up device info list
{
wvNS::wvThread::ThreadMutex::lock theLock(m_AudioDeviceInfoVecMutex);
while( m_DeviceInfoVec.size() )
{
DeviceInfo* devInfo = m_DeviceInfoVec.back();
m_DeviceInfoVec.pop_back();
delete devInfo;
}
}
delete m_CurrentDevice;
}
catch (...)
{
//destructors should absorb exceptions, no harm in logging though!!
DEBUG_MSG ("Exception during destructor");
}
}
QCDiskQueue::CloseFileStatus
QCDiskQueue::Queue::CloseFile(
QCDiskQueue::FileIdx inFileIdx,
int64_t inFileSize)
{
QCStMutexLocker theLock(mMutex);
if (inFileIdx < 0 || inFileIdx >= mFileCount || mFdPtr[inFileIdx] < 0) {
return CloseFileStatus(kErrorParameter, 0);
}
if (mFilePendingReqCountPtr[inFileIdx] > 0) {
return CloseFileStatus(kErrorHasPendingRequests, 0);
}
int theSysErr = 0;
const int theFd = mFdPtr[inFileIdx];
for (int i = inFileIdx + mFileCount; i < mFdCount; i += mFileCount) {
if (close(mFdPtr[i])) {
theSysErr = errno ? errno : -1;
}
mFdPtr[i] = -1;
}
mFdPtr[inFileIdx] = mFreeFdHead;
mFreeFdHead = -(inFileIdx + kFreeFdOffset);
theLock.Unlock();
if (theFd >= 0) {
if (inFileSize >= 0 && inFileSize < mBlockSize *
int64_t(mFileInfoPtr[inFileIdx].mLastBlockIdx) &&
ftruncate(theFd, (off_t)inFileSize)) {
theSysErr = errno ? errno : -1;
}
if (close(theFd)) {
theSysErr = errno ? errno : -1;
}
}
return CloseFileStatus(theSysErr ? kErrorClose : kErrorNone, theSysErr);
}
void Insert(
QCThread& inThread)
{
QCStMutexLocker theLock(mMutex);
ThreadList::Insert(inThread, ThreadList::GetPrev(mHead));
mCount++;
}
CompletionStatus Wait()
{
QCStMutexLocker theLock(mMutex);
while (! mDoneFlag) {
mDoneCond.Wait(mMutex);
}
return mCompletionStatus;
}
QCDiskQueue::OpenFileStatus
QCDiskQueue::Queue::OpenFile(
const char* inFileNamePtr,
int64_t inMaxFileSize,
bool inReadOnlyFlag,
bool inAllocateFileSpaceFlag,
bool inCreateFlag)
{
QCStMutexLocker theLock(mMutex);
if (mFreeFdHead == kFreeFdEnd) {
return OpenFileStatus(-1, kErrorFileIdxOutOfRange, 0);
}
const int theIdx = -mFreeFdHead - kFreeFdOffset;
QCRTASSERT(
theIdx >= 0 && theIdx < mFileCount && mFdPtr[theIdx] <= kFreeFdEnd);
mFreeFdHead = mFdPtr[theIdx];
int theSysErr = 0;
for (int i = theIdx; i < mFdCount; i += mFileCount) {
const int theFd = open(inFileNamePtr,
kOpenCommonFlags | (inCreateFlag ? O_CREAT : 0) |
(inReadOnlyFlag ? O_RDONLY : O_RDWR),
S_IRUSR | S_IWUSR);
if (theFd < 0 || fcntl(theFd, FD_CLOEXEC, 1)) {
theSysErr = errno ? errno : -1;
break;
}
mFdPtr[i] = theFd;
if (i >= mFileCount) {
continue;
}
const off_t theSize = lseek(theFd, 0, SEEK_END);
if (theSize < 0) {
theSysErr = errno;
break;
}
mFilePendingReqCountPtr[i] = 0;
const int64_t theBlkIdx =
(int64_t(inMaxFileSize < 0 ? theSize : inMaxFileSize) +
mBlockSize - 1) / mBlockSize;
if (theBlkIdx >= (int64_t(1) << kBlockBitCount)) {
theSysErr = EOVERFLOW;
break;
}
mFileInfoPtr[i].mLastBlockIdx = theBlkIdx;
mFileInfoPtr[i].mSpaceAllocPendingFlag = inAllocateFileSpaceFlag &&
! inReadOnlyFlag && inMaxFileSize > 0 && theSize < inMaxFileSize;
}
if (! theSysErr) {
return OpenFileStatus(theIdx, kErrorNone, theSysErr);
}
for (int i = theIdx; i < mFdCount; i += mFileCount) {
close(mFdPtr[i]);
mFdPtr[i] = -1;
}
mFdPtr[theIdx] = mFreeFdHead;
mFreeFdHead = -(theIdx + kFreeFdOffset);
return OpenFileStatus(-1, kErrorOpen, theSysErr);
}
/*static*/
void VCacheLog::Destroy()
{
if(s_cacheLog != NULL)
{
VTaskLock theLock(&s_mutex);
delete s_cacheLog;
s_cacheLog = NULL;
}
}
void GetPendingCount(
int& outFreeRequestCount,
int& outRequestCount,
int64_t& outReadBlockCount,
int64_t& outWriteBlockCount)
{
QCStMutexLocker theLock(mMutex);
outFreeRequestCount = mFreeCount;
outRequestCount = mPendingCount;
outReadBlockCount = mPendingReadBlockCount;
outWriteBlockCount = mPendingWriteBlockCount;
}
/*static*/
VCacheLog * VCacheLog::Get()
{
if(s_cacheLog == NULL)
{
VTaskLock theLock(&s_mutex);
if(s_cacheLog == NULL)
{
s_cacheLog = new VCacheLog;
}
}
return s_cacheLog;
}
bool
QCDiskQueue::Queue::Cancel(
QCDiskQueue::RequestId inRequestId)
{
QCStMutexLocker theLock(mMutex);
return (
mPendingCount > 0 &&
inRequestId >= kRequestQueueCount &&
inRequestId < mTotalCount &&
! mRequestsPtr[inRequestId].mInFlightFlag &&
Cancel(mRequestsPtr[inRequestId])
);
}
QCDiskQueue::Status
QCDiskQueue::Queue::UnReserveFileSpace(QCDiskQueue::FileIdx inFileIdx,
off_t inStartOffset, off_t inLen)
{
QCStMutexLocker theLock(mMutex);
if (! mRunFlag) {
return Status(kErrorQueueStopped);
}
if (inFileIdx < 0 || inFileIdx >= mFileCount || mFdPtr[inFileIdx] < 0) {
return Status(kErrorFileIdxOutOfRange);
}
QCUtils::UnReserveFileSpace(mFdPtr[inFileIdx], inStartOffset, inLen);
return Status(kErrorNone);
}
QCDiskQueue::Status
QCDiskQueue::Queue::AllocateFileSpace(
QCDiskQueue::FileIdx inFileIdx)
{
QCStMutexLocker theLock(mMutex);
if (! mRunFlag) {
return Status(kErrorQueueStopped);
}
if (inFileIdx < 0 || inFileIdx >= mFileCount || mFdPtr[inFileIdx] < 0) {
return Status(kErrorFileIdxOutOfRange);
}
mFileInfoPtr[inFileIdx].mSpaceAllocPendingFlag = true;
return Status(kErrorNone);
}
WTErr WCMRAudioDeviceManager::GetDeviceInfoByName(const std::string & nameToMatch, DeviceInfo & devInfo) const
{
wvNS::wvThread::ThreadMutex::lock theLock(m_AudioDeviceInfoVecMutex);
DeviceInfoVecConstIter iter = m_DeviceInfoVec.begin();
for (; iter != m_DeviceInfoVec.end(); ++iter)
{
if (nameToMatch == (*iter)->m_DeviceName)
{
devInfo = *(*iter);
return eNoErr;
}
}
return eRMResNotFound;
}
virtual bool Done(
RequestId inRequestId,
FileIdx inFileIdx,
BlockIdx inStartBlockIdx,
InputIterator& inBufferItr,
int inBufferCount,
Error inCompletionCode,
int inSysErrorCode,
int64_t inIoByteCount)
{
QCStMutexLocker theLock(mMutex);
mDoneFlag = true;
mCompletionStatus =
CompletionStatus(inCompletionCode, inSysErrorCode, inIoByteCount);
CopyBufs(&inBufferItr, inBufferCount);
mDoneCond.Notify();
return true;
}
QCDiskQueue::EnqueueStatus
QCDiskQueue::Queue::Sync(
QCDiskQueue::FileIdx inFileIdx,
QCDiskQueue::IoCompletion* inIoCompletionPtr,
QCDiskQueue::Time inTimeWaitNanoSec)
{
QCStMutexLocker theLock(mMutex);
if (! mRunFlag) {
return EnqueueStatus(kRequestIdNone, kErrorQueueStopped);
}
if (inFileIdx < 0 || inFileIdx >= mFileCount || mFdPtr[inFileIdx] < 0) {
return EnqueueStatus(kRequestIdNone, kErrorFileIdxOutOfRange);
}
Request* theReqPtr;
if (! (theReqPtr = Get(0))) {
QCStValueIncrementor<int> theIncr(mReqWaitersCount, 1);
if (inTimeWaitNanoSec < 0) {
mFreeReqCond.Wait(mMutex);
} else if (inTimeWaitNanoSec == 0 ||
! mFreeReqCond.Wait(mMutex, inTimeWaitNanoSec)) {
if (inTimeWaitNanoSec != 0) {
theLock.Detach();
}
return EnqueueStatus(kRequestIdNone, kErrorOutOfRequests);
}
}
QCASSERT(theReqPtr);
// FIXME: implement real io barrier, for now just queue empty read request.
Request& theReq = *theReqPtr;
theReq.mReqType = kReqTypeRead;
theReq.mBufferCount = 0;
theReq.mFileIdx = inFileIdx;
theReq.mBlockIdx = 0;
theReq.mIoCompletionPtr = inIoCompletionPtr;
char** const theBufsPtr = GetBuffersPtr(theReq);
theBufsPtr[0] = 0;
return EnqueueStatus(kErrorNone);
}
/* virtual */ void
QCDiskQueue::Queue::Run(
int inThreadIndex)
{
QCStMutexLocker theLock(mMutex);
QCASSERT(inThreadIndex >= 0 && inThreadIndex < mThreadCount);
int* const theFdPtr = mFdPtr +
mFdCount / mThreadCount * inThreadIndex;
struct iovec* const theIoVecPtr = mIoVecPtr +
mIoVecPerThreadCount * inThreadIndex;
while (mRunFlag) {
Request* theReqPtr;
while (! (theReqPtr = Dequeue()) && mRunFlag) {
mWorkCond.Wait(mMutex);
}
if (mRunFlag) {
QCASSERT(theReqPtr);
Process(*theReqPtr, theFdPtr, theIoVecPtr);
} else if (theReqPtr) {
Cancel(*theReqPtr);
}
}
}
QCDiskQueue::IoCompletion*
QCDiskQueue::Queue::CancelOrSetCompletionIfInFlight(
QCDiskQueue::RequestId inRequestId,
QCDiskQueue::IoCompletion* inCompletionIfInFlightPtr)
{
QCStMutexLocker theLock(mMutex);
if (mPendingCount <= 0 ||
inRequestId < kRequestQueueCount ||
inRequestId >= mTotalCount) {
return 0;
}
Request& theReq = mRequestsPtr[inRequestId];
if (theReq.mReqType == kReqTypeNone) {
// Completion is already running, or done.
return theReq.mIoCompletionPtr;
}
if (! theReq.mInFlightFlag) {
IoCompletion* const theIoCompletionPtr = theReq.mIoCompletionPtr;
return (Cancel(theReq) ? theIoCompletionPtr : 0);
}
// In flight, change io completion.
theReq.mIoCompletionPtr = inCompletionIfInFlightPtr;
return inCompletionIfInFlightPtr;
}
void Stop()
{
QCStMutexLocker theLock(mMutex);
StopSelf();
}
const DeviceInfoVec WCMRAudioDeviceManager::DeviceInfoList() const
{
wvNS::wvThread::ThreadMutex::lock theLock(m_AudioDeviceInfoVecMutex);
return m_DeviceInfoVec;
}
int GetThreadCount()
{
QCStMutexLocker theLock(mMutex);
return mCount;
}
void ZCnd_boost::Wait(boost::mutex& iMtx)
{
boost::mutex::scoped_lock theLock(iMtx, boost::adopt_lock);
condition_variable::wait(theLock);
}
void
QCDiskQueue::Queue::Process(
Request& inReq,
int* inFdPtr,
struct iovec* inIoVecPtr)
{
QCASSERT(mMutex.IsOwned());
QCASSERT(mIoVecPerThreadCount > 0 && mBufferPoolPtr);
QCRTASSERT(//mFileInfoPtr[inReq.mFileIdx].mLastBlockIdx >= 0 &&
inReq.mBlockIdx + inReq.mBufferCount <=
uint64_t(mFileInfoPtr[inReq.mFileIdx].mLastBlockIdx));
const int theFd = inFdPtr[inReq.mFileIdx];
char** const theBufPtr = GetBuffersPtr(inReq);
const off_t theOffset = (off_t)inReq.mBlockIdx * mBlockSize;
const bool theReadFlag = inReq.mReqType == kReqTypeRead;
const int64_t theAllocSize = (inReq.mReqType == kReqTypeWrite &&
mFileInfoPtr[inReq.mFileIdx].mSpaceAllocPendingFlag) ?
mFileInfoPtr[inReq.mFileIdx].mLastBlockIdx * mBlockSize : 0;
QCASSERT((theReadFlag || inReq.mReqType == kReqTypeWrite) && theFd >= 0);
inReq.mInFlightFlag = true;
QCStMutexUnlocker theUnlock(mMutex);
Error theError = kErrorNone;
int theSysError = 0;
if (theAllocSize > 0) {
// Theoretically space allocation can be simultaneously invoked from
// more than one io thread. This is to ensure that allocation always
// happen before the first write.
// OS can deal with concurrent allocations.
const int64_t theResv = QCUtils::ReserveFileSpace(theFd, theAllocSize);
if (theResv < 0) {
theError = kErrorSpaceAlloc;
theSysError = int(-theResv);
}
if (theResv > 0 && ftruncate(theFd, theAllocSize)) {
theError = kErrorSpaceAlloc;
theSysError = errno;
}
if (theError == kErrorNone) {
QCStMutexLocker theLock(mMutex);
mFileInfoPtr[inReq.mFileIdx].mSpaceAllocPendingFlag = false;
}
}
const bool theGetBufFlag = ! theBufPtr[0];
if (theError == kErrorNone && theGetBufFlag) {
QCASSERT(theReadFlag);
BuffersIterator theIt(*this, inReq, inReq.mBufferCount);
// Allocate buffers for read request.
if (! mBufferPoolPtr->Get(theIt, inReq.mBufferCount,
QCIoBufferPool::kRefillReqIdRead)) {
theError = kErrorOutOfBuffers;
}
}
if (theError == kErrorNone &&
lseek(theFd, theOffset, SEEK_SET) != theOffset) {
theError = kErrorSeek;
theSysError = errno;
}
BuffersIterator theItr(*this, inReq, inReq.mBufferCount);
int theBufCnt = inReq.mBufferCount;
int64_t theIoByteCnt = 0;
while (theBufCnt > 0 && theError == kErrorNone) {
ssize_t theIoBytes = 0;
int theIoVecCnt = 0;
char* thePtr;
while (theIoVecCnt < mIoVecPerThreadCount && (thePtr = theItr.Get())) {
inIoVecPtr[theIoVecCnt ].iov_base = thePtr;
inIoVecPtr[theIoVecCnt++].iov_len = mBlockSize;
theIoBytes += mBlockSize;
theBufCnt--;
}
QCRTASSERT(theIoVecCnt > 0);
if (theReadFlag) {
const ssize_t theNRd = readv(theFd, inIoVecPtr, theIoVecCnt);
if (theNRd < 0) {
theError = kErrorRead;
theSysError = theNRd < 0 ? errno : 0;
break;
}
theIoByteCnt += theNRd;
if (theNRd < theIoBytes) {
if (theGetBufFlag) {
// Short read -- release extra buffers.
mBufferPoolPtr->Put(theItr, theBufCnt);
inReq.mBufferCount -= theBufCnt;
int i = (theNRd + mBlockSize - 1) / mBlockSize;
inReq.mBufferCount -= theIoVecCnt - i;
while (i < theIoVecCnt) {
mBufferPoolPtr->Put((char*)inIoVecPtr[i++].iov_base);
}
}
break;
}
} else {
const ssize_t theNWr = writev(theFd, inIoVecPtr, theIoVecCnt);
if (theNWr > 0) {
theIoByteCnt += theNWr;
}
if (theNWr != theIoBytes) {
theError = kErrorWrite;
theSysError = errno;
break;
}
}
}
if (theGetBufFlag && theError != kErrorNone && theBufPtr[0]) {
BuffersIterator theIt(*this, inReq, inReq.mBufferCount);
mBufferPoolPtr->Put(theIt, inReq.mBufferCount);
theBufPtr[0] = 0;
}
theUnlock.Lock();
RequestComplete(inReq, theError, theSysError, theIoByteCnt, theGetBufFlag);
}
int
QCDiskQueue::Queue::Start(
int inThreadCount,
int inMaxQueueDepth,
int inMaxBuffersPerRequestCount,
int inFileCount,
const char** inFileNamesPtr,
QCIoBufferPool& inBufferPool)
{
QCStMutexLocker theLock(mMutex);
StopSelf();
if (inFileCount <= 0 || inThreadCount <= 0 ||
inThreadCount <= 0 || inMaxQueueDepth <= 0 ||
inMaxBuffersPerRequestCount <= 0) {
return 0;
}
if (inFileCount >= (1 << kFileIndexBitCount)) {
return EINVAL;
}
mBufferPoolPtr = &inBufferPool;
#ifdef IOV_MAX
const int kMaxIoVecCount = IOV_MAX;
#else
const int kMaxIoVecCount = 1 << 10;
#endif
mIoVecPerThreadCount = inMaxBuffersPerRequestCount;
if (mIoVecPerThreadCount > kMaxIoVecCount) {
mIoVecPerThreadCount = kMaxIoVecCount;
}
mFileCount = inFileCount;
mIoVecPtr = new struct iovec[mIoVecPerThreadCount * inThreadCount];
mBlockSize = inBufferPool.GetBufferSize();
const int theFdCount = inThreadCount * mFileCount;
mFdPtr = new int[theFdCount];
mFilePendingReqCountPtr = new unsigned int[mFileCount];
mFileInfoPtr = new FileInfo[mFileCount];
mFreeFdHead = kFreeFdEnd;
for (mFdCount = 0; mFdCount < theFdCount; ) {
int theError = 0;
for (int i = 0; i < mFileCount; i++) {
int& theFd = mFdPtr[mFdCount];
theFd = inFileNamesPtr ?
open(inFileNamesPtr[i], kOpenCommonFlags | O_RDWR) : -1;
if (theFd < 0 && inFileNamesPtr) {
theError = errno;
break;
}
if (theFd >= 0 && fcntl(theFd, FD_CLOEXEC, 1)) {
theError = errno;
break;
}
if (++mFdCount > mFileCount) {
continue;
}
const off_t theSize = theFd >= 0 ? lseek(theFd, 0, SEEK_END) : 0;
if (theSize < 0) {
theError = errno;
break;
}
mFilePendingReqCountPtr[i] = 0;
// Allow last partial block.
const int64_t theBlkIdx =
(int64_t(theSize) + mBlockSize - 1) / mBlockSize;
if (theBlkIdx >= (int64_t(1) << kBlockBitCount)) {
theError = EOVERFLOW;
break;
}
mFileInfoPtr[i].mLastBlockIdx = theBlkIdx;
mFileInfoPtr[i].mSpaceAllocPendingFlag = false;
if (theFd < 0) {
theFd = mFreeFdHead;
mFreeFdHead = -(i + kFreeFdOffset);
}
}
if (theError) {
StopSelf();
return theError;
}
}
mBuffersPtr = new char*[inMaxQueueDepth * inMaxBuffersPerRequestCount];
mRequestBufferCount = inMaxBuffersPerRequestCount;
const int theReqCnt = kRequestQueueCount + inMaxQueueDepth;
mRequestsPtr = new Request[theReqCnt];
// Init list heads: kFreeQueueIdx kIoQueueIdx.
for (mTotalCount = 0; mTotalCount < kRequestQueueCount; mTotalCount++) {
Init(mRequestsPtr[mTotalCount]);
}
// Make free list.
for (; mTotalCount < theReqCnt; mTotalCount++) {
Request& theReq = mRequestsPtr[mTotalCount];
Init(theReq);
Put(theReq);
}
mThreadsPtr = new IoThread[inThreadCount];
mRunFlag = true;
const int kStackSize = 32 << 10;
const char* const kNamePtr = "IO";
for (mThreadCount = 0; mThreadCount < inThreadCount; mThreadCount++) {
const int theRet = mThreadsPtr[mThreadCount].Start(
*this, mThreadCount, kStackSize, kNamePtr);
if (theRet != 0) {
StopSelf();
return theRet;
}
}
return 0;
}
QCDiskQueue::EnqueueStatus
QCDiskQueue::Queue::Enqueue(
QCDiskQueue::ReqType inReqType,
QCDiskQueue::FileIdx inFileIdx,
QCDiskQueue::BlockIdx inBlockIdx,
QCDiskQueue::InputIterator* inBufferIteratorPtr,
int inBufferCount,
QCDiskQueue::IoCompletion* inIoCompletionPtr,
QCDiskQueue::Time inTimeWaitNanoSec)
{
if ((inReqType != kReqTypeRead && inReqType != kReqTypeWrite) ||
inBufferCount <= 0 ||
inBufferCount > (mRequestBufferCount *
(mTotalCount - kRequestQueueCount)) ||
(! inBufferIteratorPtr && inReqType == kReqTypeWrite)) {
return EnqueueStatus(kRequestIdNone, kErrorParameter);
}
QCStMutexLocker theLock(mMutex);
if (! mRunFlag) {
return EnqueueStatus(kRequestIdNone, kErrorQueueStopped);
}
if (inFileIdx < 0 || inFileIdx >= mFileCount || mFdPtr[inFileIdx] < 0) {
return EnqueueStatus(kRequestIdNone, kErrorFileIdxOutOfRange);
}
if (inBlockIdx < 0 ||
inBlockIdx + (inBufferIteratorPtr ? 0 : inBufferCount) >
int64_t(mFileInfoPtr[inFileIdx].mLastBlockIdx)) {
return EnqueueStatus(kRequestIdNone, kErrorBlockIdxOutOfRange);
}
Request* theReqPtr;
while (! (theReqPtr = Get(inBufferCount))) {
QCStValueIncrementor<int> theIncr(mReqWaitersCount, 1);
if (inTimeWaitNanoSec < 0) {
mFreeReqCond.Wait(mMutex);
} else if (inTimeWaitNanoSec == 0 ||
! mFreeReqCond.Wait(mMutex, inTimeWaitNanoSec)) {
if (inTimeWaitNanoSec != 0) {
theLock.Detach();
}
return EnqueueStatus(kRequestIdNone, kErrorOutOfRequests);
}
}
QCASSERT(theReqPtr);
Request& theReq = *theReqPtr;
theReq.mReqType = inReqType;
theReq.mBufferCount = 0;
theReq.mFileIdx = inFileIdx;
theReq.mBlockIdx = inBlockIdx;
theReq.mIoCompletionPtr = inIoCompletionPtr;
if (inBufferIteratorPtr) {
BuffersIterator theItr(*this, theReq, inBufferCount);
for (int i = 0; i < inBufferCount; i++) {
char* const thePtr = inBufferIteratorPtr->Get();
if (! thePtr) {
break;
}
theItr.Put(thePtr);
theReq.mBufferCount++;
}
if (theReq.mBufferCount < inBufferCount) {
// Free unused requests if any.
TrimRequestList(theReq, theReq.mBufferCount);
}
} else if (inReqType == kReqTypeRead) {
// Defer buffer allocation.
GetBuffersPtr(theReq)[0] = 0;
theReq.mBufferCount = inBufferCount;
}
if (theReq.mBlockIdx + theReq.mBufferCount >
uint64_t(mFileInfoPtr[theReq.mFileIdx].mLastBlockIdx)) {
Put(theReq);
return EnqueueStatus(kRequestIdNone, kErrorBlockIdxOutOfRange);
}
if (theReq.mBufferCount <= 0) {
Put(theReq);
return EnqueueStatus(kRequestIdNone, kErrorBlockCountOutOfRange);
}
Enqueue(theReq);
mWorkCond.Notify();
return GetRequestId(theReq);
}
