NdisAllocateMemoryWithTagPriority function (ndis.h)

Article
02/22/2024

NDIS drivers call the NdisAllocateMemoryWithTagPriority function to allocate a pool of memory from the non-paged pool.

Syntax

PVOID NdisAllocateMemoryWithTagPriority(
  [in] NDIS_HANDLE      NdisHandle,
  [in] UINT             Length,
  [in] ULONG            Tag,
  [in] EX_POOL_PRIORITY Priority
);

Parameters

[in] NdisHandle

An NDIS handle that the caller obtained during initialization. For example, a miniport driver can use the NDIS handle that it obtained from the NdisMRegisterMiniportDriver or MiniportInitializeEx function. Other NDIS drivers can use the handles from the following functions:

NdisRegisterProtocolDriver

NdisOpenAdapterEx

NdisFRegisterFilterDriver

FilterAttach

[in] Length

The size to be allocated, in bytes.

[in] Tag

A string, delimited by single quotation marks, with up to four characters, usually specified in reversed order. The NDIS-supplied default tag for this call is 'maDN', but the caller can override this default by supplying an explicit value.

[in] Priority

The importance of this request. For more information, see ExAllocatePoolWithTagPriority.

Return value

NdisAllocateMemoryWithTagPriority returns a pointer to a base virtual address of the allocated memory, or NULL if sufficient nonpaged memory is currently unavailable.

Remarks

To free memory that was allocated with NdisAllocateMemoryWithTagPriority, call the NdisFreeMemoryWithTagPriority or NdisFreeMemory function.

Requirements

Requirement	Value
Minimum supported client	Supported in NDIS 6.0 and later.
Target Platform	Universal
Header	ndis.h (include Ndis.h)
Library	Ndis.lib
IRQL	<= DISPATCH_LEVEL
DDI compliance rules	Irql_Miscellaneous_Function(ndis), NdisAllocateMemoryWithTagPriority(ndis), NdisAllocateMemoryWithTagPriority_Cleanup(ndis), NdisAllocateMemoryWithTagPriority_InitFail(ndis)