RtndGetTxBuffers

RtndGetTxBuffers gets multiple buffers from the driver's pool of available transmit buffers.

Syntax

Copy

BOOL RtndGetTxBuffers(
  [in]    ULONG_PTR RtndInterfaceId,
  [in]    ULONG TxQueueIndex,
  [in]    ULONG BufferCount,
  [out]   RTND_BUFFER_HEADER **pBufferHeader
);

Parameters

[in] RtndInterfaceId

The number or pointer used to identify the interface. This value is returned by RtndManageInterface.

[in] TxQueueIndex

The index of the Transmit Queue.

[in] BufferCount

The number of buffers to request.

[out] pBufferHeader

The buffer header address of the first buffer received from the driver’s pool of available transmit buffers.

Return Value

If the function succeeds, it returns TRUE. If the function fails, it returns FALSE. To get extended error information, call GetLastError.

Common error codes:

Error code	Meaning
ERROR_DEVICE_NO_RESOURCES	The driver’s pool of available transmit buffers is empty or has less than the requested number of buffers.

Remarks

The NL2 always calls this function from the main thread of the NL2 process.

Characteristics

Real-time requirements
Deterministic behavior	Not required
Local memory allocation/deallocation restrictions
Process	External MSpace	Internal MSpace
System	Not allowed	Not allowed
Process	Not allowed	Not allowed
Contiguous memory allocation/deallocation restrictions
Contiguous memory	Not allowed

Requirements

Minimum supported version	Header
eRTOS 1.0 SDK	Rtnd.h