NI-RIO: FIFO management optimizations for PCIe performance

Pre-acquiring as much buffer as possible
When acquiring during a streaming operation, acquire a minimum amount (frame size) or the amount we know is acquire-able
Adding docstrings to nirio_fifo
Making const-qualifying consistent

1 files changed, 7 insertions, 7 deletions

diff --git a/host/lib/transport/nirio/niriok_proxy_impl_v2.cpp b/host/lib/transport/nirio/niriok_proxy_impl_v2.cpp
index f75de01e1..4e88b8a6e 100644
--- a/host/lib/transport/nirio/niriok_proxy_impl_v2.cpp
+++ b/host/lib/transport/nirio/niriok_proxy_impl_v2.cpp
@@ -759,14 +759,14 @@ namespace uhd { namespace niusrprio
         in.timeout = timeout;
         in.status = NiRio_Status_Success;
 
-        ioctl_status = 
+           ioctl_status =
            nirio_driver_iface::rio_ioctl(
-               _device_handle,
-               IOCTL_TRANSPORT_FIFO_WAIT,
-               &in,
-               sizeof(in),
-               &out,
-               sizeof(out));
+              _device_handle,
+              IOCTL_TRANSPORT_FIFO_WAIT,
+              &in,
+              sizeof(in),
+              &out,
+              sizeof(out));
         if (nirio_status_fatal(ioctl_status)) return ioctl_status;
 
         data_pointer = reinterpret_cast<void*>(out.elements);