private HRESULT ProcessPlaceholderRequest(
PRJ_CALLBACK_DATA callbackData
)
{
return(_asyncOperations.ProcessCommandPossibleAsync(
callbackData.NamespaceVirtualizationContext,
callbackData.CommandId,
cts => FileSystem.GetPlaceholder(
callbackData.FilePathName,
s => _outboundFunctions.PrjFileNameMatch(s, callbackData.FilePathName),
cts.Token),
placeholder =>
{
if (placeholder == null)
{
return HRESULT.ERROR_FILE_NOT_FOUND;
}
using (var buffer = LevelShifter.PRJ_PLACEHOLDER_INFOFromPlaceholderInfo(placeholder))
{
var result = _outboundFunctions.PrjWritePlaceholderInfo(callbackData.NamespaceVirtualizationContext, placeholder.DestinationFileName, buffer.Buffer, buffer.Sizes.totalSize);
return result;
}
}
));
}
private HRESULT ProcessStartEnumeration(
PRJ_CALLBACK_DATA callbackData,
Guid enumerationId
)
{
try
{
var cts = new CancellationTokenSource();
var ongoing = new OngoingEnumeration
{
Path = callbackData.FilePathName,
VersionInfo = LevelShifter.PlaceholderVersionFromPRJ_PLACEHOLDER_VERSION_INFO(callbackData.VersionInfo),
State = EnumerationState.Init
};
if (!_inFlightEnumerations.TryAdd(enumerationId, ongoing))
{
cts.Cancel();
return(HRESULT.E_INVALIDARG);
}
return(HRESULT.S_OK);
}
catch (Exception) {
return(HRESULT.E_INVALIDARG);
}
}
internal HRESULT ProcessDataRequest(
PRJ_CALLBACK_DATA callbackData,
ulong byteOffset,
uint length
)
{
var weirdnessOffset = byteOffset % (ulong)_virtualizationInfo.WriteAlignment;
byteOffset -= weirdnessOffset;
length += (uint)weirdnessOffset;
var stream = new FileWriteStream(byteOffset,
_virtualizationInfo.WriteAlignment,
callbackData.NamespaceVirtualizationContext,
callbackData.DataStreamId, _outboundFunctions);
return(_asyncOperations.ProcessCommandPossibleAsync(
callbackData.NamespaceVirtualizationContext,
callbackData.CommandId,
cts => FileSystem.GetFileData(
callbackData.FilePathName,
LevelShifter.PlaceholderVersionFromPRJ_PLACEHOLDER_VERSION_INFO(callbackData.VersionInfo),
(long)byteOffset,
(int)length,
stream).ContinueWith(t => {
stream.Close();
})));
}
private bool SendCurrentEnumeratorValue(OngoingEnumeration ongoing, IntPtr dirEntryBufferHandle)
{
var current = ongoing.Enumerator.Current;
if (_outboundFunctions.PrjFillDirEntryBuffer(
current.Name,
LevelShifter.PRJ_FILE_BASIC_INFOFromBasicInfo(current),
dirEntryBufferHandle) == HRESULT.S_OK)
{
return(true);
}
return(false);
}
