// 1394.h

typedef struct _IRB_REQ_FREE_ADDRESS_RANGE {
  ULONG          nAddressesToFree;
  PADDRESS_RANGE p1394AddressRange;
  PHANDLE        pAddressRange;
  PVOID          DeviceExtension;
} IRB_REQ_FREE_ADDRESS_RANGE;
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Windows Driver Kit DDI reference (ns-1394-_irb_req_free_address_range)

_IRB_REQ_FREE_ADDRESS_RANGE structure

Description

This structure contains the fields necessary for the 1394 stack to carry out a free address range request.

Members

`nAddressesToFree`

Specifies the number of ADDRESS_RANGE structures pointed to by IRB.u.FreeAddressRange.p1394AddressRange

`p1394AddressRange`

Specifies a pointer to an array of ADDRESS_RANGE data structures to be released. These address ranges were returned in a prior successful call to AllocateAddressRange.

`pAddressRange`

Points to the handle that was previously received in IRB.u.AllocateAddressRange.hAddressRange in the REQUEST_ALLOCATE_ADDRESS_RANGE request.

`DeviceExtension`

Points to the device extension associated with the device object. Not setting this member can lead to unexpected behavior when the driver tries to access the allocated address space.

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