NdisDprAllocatePacket function
Note NDIS 5. x has been deprecated and is superseded by NDIS 6. x. For new NDIS driver development, see Network Drivers Starting with Windows Vista. For information about porting NDIS 5. x drivers to NDIS 6. x, see Porting NDIS 5.x Drivers to NDIS 6.0.
NdisDprAllocatePacket allocates and initializes a packet descriptor when the caller is running at IRQL = DISPATCH_LEVEL.
Syntax
VOID NdisDprAllocatePacket(
_Out_ PNDIS_STATUS Status,
_Out_ PNDIS_PACKET *Packet,
_In_ NDIS_HANDLE PoolHandle
);
Parameters
Status [out]
Pointer to a caller-supplied variable in which this function returns the final status of the request, which can be one of the following:NDIS_STATUS_SUCCESS
The caller can use the packet descriptor returned at Packet.NDIS_STATUS_RESOURCES
The free list for the packet pool currently has no available entries. The variable at Packet is set to NULL.
Packet [out]
Pointer to a caller-supplied variable in which this function returns a pointer to the allocated packet descriptor.PoolHandle [in]
Specifies the handle returned by a preceding call to NdisAllocatePacketPool.
Return value
None
Remarks
NdisDprAllocatePacket runs slightly faster than NdisAllocatePacket because NDIS can acquire the spin lock it uses to synchronize access to the packet pool without having to raise IRQL.
The caller of NdisDprAllocatePacket must eventually free the allocated packet descriptor by calling NdisDprFreePacket or NdisFreePacket.
A caller of NdisDprAllocatePacket must be running at IRQL = DISPATCH_LEVEL. Otherwise, the driver should call NdisAllocatePacket.
Requirements
Target platform |
Universal |
Version |
Not supported for NDIS 6.0 drivers in Windows Vista. Supported for NDIS 5.1 drivers in Windows Vista and Windows XP. |
Header |
Ndis.h (include Ndis.h) |
Library |
Ndis.lib |
IRQL |
DISPATCH_LEVEL (See Remarks section) |
See also
NdisDprAllocatePacketNonInterlocked