{
    PIO_RESOURCE_REQUIREMENTS_LIST RequirementsList;
    ULONG Count = 0, ListSize;
    NTSTATUS Status;
    PAGED_CODE();

    /* Get ACPI resources */
    HalpAcpiDetectResourceListSize(&Count);
    DPRINT("Resource count: %d\n", Count);

    /* Compute size of the list and allocate it */
    ListSize = FIELD_OFFSET(IO_RESOURCE_REQUIREMENTS_LIST, List[0].Descriptors) +
               (Count * sizeof(IO_RESOURCE_DESCRIPTOR));
    DPRINT("Resource list size: %d\n", ListSize);
    RequirementsList = ExAllocatePoolWithTag(PagedPool, ListSize, ' laH');
    if (RequirementsList)
    {
        /* Initialize it */
        RtlZeroMemory(RequirementsList, ListSize);
        RequirementsList->ListSize = ListSize;

        /* Build it */
        Status = HalpBuildAcpiResourceList(RequirementsList);
        if (NT_SUCCESS(Status))
        {
            /* It worked, return it */
            *Requirements = RequirementsList;

            /* Validate the list */
            ASSERT(RequirementsList->List[0].Count == Count);
        }
        else
        {
            /* Fail */
            ExFreePoolWithTag(RequirementsList, ' laH');
            Status = STATUS_NO_SUCH_DEVICE;
        }
    }
    else
    {
        /* Not enough memory */
        Status = STATUS_INSUFFICIENT_RESOURCES;
    }

    /* Return the status */
    return Status;
}

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