private async Task <int> ReadFileUnmarshalledAsync(
int fileRef, byte[] buffer, long position, long bufferOffset, int count,
CancellationToken cancellationToken)
{
var taskCompletionSource = new TaskCompletionSource <int>();
var id = ++_readFileUnmarshalledCallIdSource;
_readFileUnmarshalledCalls[id] = taskCompletionSource;
cancellationToken.Register(() => taskCompletionSource.TrySetCanceled());
// Do not try to push over the buffer here...
CurrentJSRuntime.InvokeUnmarshalled <ReadFileParams, int>(
$"FileReaderComponent.ReadFileUnmarshalledAsync",
new ReadFileParams {
BufferOffset = bufferOffset,
Count = count,
FileRef = fileRef,
Position = position,
TaskId = id
});
// as it might not survive the heap charge of the following statement
await taskCompletionSource.Task;
// Charge the buffer here instead, once its loadeg on the js side
var bytesRead = CurrentJSRuntime.InvokeUnmarshalled <BufferParams, int>(
$"FileReaderComponent.FillBufferUnmarshalled",
new BufferParams
{
TaskId = id,
Buffer = buffer
});
return(bytesRead);
}
