WDF_PTR_GET_OFFSET macro

The WDF_PTR_GET_OFFSET macro subtracts an address from another address and returns the resulting offset value.

Syntax

size_t WDF_PTR_GET_OFFSET(
    _base,
    _addr
);

Parameters

_base
Specifies the value to subtract from the starting address.

_addr
Specifies the starting address.

Return value

Returns the offset between the two specified addresses.

Remarks

The macro is defined as follows:

#define WDF_PTR_GET_OFFSET(_base, _addr) \
        (size_t) (((PUCHAR) _addr) - ((PUCHAR) _base))

Requirements