internal Status ContextReadAtAddress <Input, Output, Context, FasterSession>(long address, ref Input input, ref Output output, ReadFlags readFlags, Context context, FasterSession fasterSession, long serialNo,
FasterExecutionContext <Input, Output, Context> sessionCtx)
where FasterSession : IFasterSession <Key, Value, Input, Output, Context>
{
var pcontext = default(PendingContext <Input, Output, Context>);
pcontext.operationFlags = PendingContext <Input, Output, Context> .GetOperationFlags(readFlags, noKey : true);
Key key = default;
var internalStatus = InternalRead(ref key, ref input, ref output, address, ref context, ref pcontext, fasterSession, sessionCtx, serialNo);
Debug.Assert(internalStatus != OperationStatus.RETRY_NOW);
Status status;
if (internalStatus == OperationStatus.SUCCESS || internalStatus == OperationStatus.NOTFOUND)
{
status = (Status)internalStatus;
}
else
{
status = HandleOperationStatus(sessionCtx, sessionCtx, ref pcontext, fasterSession, internalStatus, false, out _);
}
Debug.Assert(serialNo >= sessionCtx.serialNum, "Operation serial numbers must be non-decreasing");
sessionCtx.serialNum = serialNo;
return(status);
}
internal ValueTask <ReadAsyncResult <Input, Output, Context> > ReadAsync <Input, Output, Context>(IFasterSession <Key, Value, Input, Output, Context> fasterSession,
FasterExecutionContext <Input, Output, Context> currentCtx,
ref Key key, ref Input input, ref ReadOptions readOptions, Context context, long serialNo, CancellationToken token, bool noKey = false)
{
var pcontext = default(PendingContext <Input, Output, Context>);
var operationFlags = PendingContext <Input, Output, Context> .GetOperationFlags(MergeReadFlags(currentCtx.ReadFlags, readOptions.ReadFlags), noKey);
pcontext.SetOperationFlags(operationFlags, readOptions.StopAddress);
var diskRequest = default(AsyncIOContext <Key, Value>);
Output output = default;
fasterSession.UnsafeResumeThread();
try
{
OperationStatus internalStatus;
do
{
internalStatus = InternalRead(ref key, ref input, ref output, readOptions.StartAddress, ref context, ref pcontext, fasterSession, currentCtx, serialNo);
}while (internalStatus == OperationStatus.RETRY_NOW);
Debug.Assert(internalStatus != OperationStatus.RETRY_LATER);
if (OperationStatusUtils.TryConvertToStatusCode(internalStatus, out Status status))
{
return(new ValueTask <ReadAsyncResult <Input, Output, Context> >(new ReadAsyncResult <Input, Output, Context>(new(internalStatus), output, new RecordMetadata(pcontext.recordInfo, pcontext.logicalAddress))));
}
status = HandleOperationStatus(currentCtx, currentCtx, ref pcontext, fasterSession, internalStatus, true, out diskRequest);
if (!status.IsPending)
{
return(new ValueTask <ReadAsyncResult <Input, Output, Context> >(new ReadAsyncResult <Input, Output, Context>(status, output, new RecordMetadata(pcontext.recordInfo, pcontext.logicalAddress))));
}
}
finally
{
Debug.Assert(serialNo >= currentCtx.serialNum, "Operation serial numbers must be non-decreasing");
currentCtx.serialNum = serialNo;
fasterSession.UnsafeSuspendThread();
}
return(SlowReadAsync(this, fasterSession, currentCtx, pcontext, diskRequest, token));
}
