static async ValueTask <ReadAsyncResult> SlowReadAsync(
FasterKV <Key, Value, Input, Output, Context, Functions> @this,
ClientSession <Key, Value, Input, Output, Context, Functions> clientSession,
PendingContext pendingContext, CancellationToken token = default)
{
var diskRequest = @this.ScheduleGetFromDisk(clientSession.ctx, ref pendingContext);
clientSession.ctx.ioPendingRequests.Add(pendingContext.id, pendingContext);
clientSession.ctx.asyncPendingCount++;
clientSession.ctx.pendingReads.Add();
try
{
token.ThrowIfCancellationRequested();
if (@this.epoch.ThisInstanceProtected())
{
throw new NotSupportedException("Async operations not supported over protected epoch");
}
diskRequest = await diskRequest.asyncOperation.ValueTaskOfT;
}
catch
{
clientSession.ctx.ioPendingRequests.Remove(pendingContext.id);
clientSession.ctx.asyncPendingCount--;
throw;
}
finally
{
clientSession.ctx.pendingReads.Remove();
}
return(new ReadAsyncResult(@this, clientSession, pendingContext, diskRequest));
}