__in __drv_strictTypeMatch()

in src/framework/shared/support/fxresourcecollection.cpp [367:429]

• 35 lines of code
• 4 McCabe index (conditional complexity)

    __in __drv_strictTypeMatch(__drv_typeExpr) POOL_FLAGS PoolFlags
    )
/*++

Routine Description:
    Allocates and initializes a WDM CM resource list based off of the current
    contents of this collection.

Arguments:
    PoolFlags - the pool flags from which to allocate the resource list

Return Value:
    a new resource list upon success, NULL upon failure

  --*/
{
    PCM_RESOURCE_LIST pWdmResourceList;
    ULONG size;
    PFX_DRIVER_GLOBALS pFxDriverGlobals;

    pWdmResourceList = NULL;
    pFxDriverGlobals = GetDriverGlobals();

    if (Count()) {
        //
        // NOTE: This function assumes all resources are on the same bus
        // and therefore there is only one FULL_RESOURCE_DESCRIPTOR.
        //
        size = sizeof(CM_RESOURCE_LIST) +
               (sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR) * (Count() - 1));

        pWdmResourceList = (PCM_RESOURCE_LIST)
            MxMemory::MxAllocatePool2(PoolFlags, size, pFxDriverGlobals->Tag);

        if (pWdmResourceList != NULL) {
            PCM_PARTIAL_RESOURCE_DESCRIPTOR pDescriptor;
            FxCollectionEntry *cur, *end;

            pWdmResourceList->Count = 1;  // We only return one full descriptor

            pWdmResourceList->List[0].PartialResourceList.Version  = 1;
            pWdmResourceList->List[0].PartialResourceList.Revision = 1;
            pWdmResourceList->List[0].PartialResourceList.Count = Count();

            pDescriptor =
                pWdmResourceList->List[0].PartialResourceList.PartialDescriptors;

            end = End();
            for (cur = Start(); cur != end; cur = cur->Next()) {
                FxResourceCm *pResource;

                pResource = (FxResourceCm*) cur->m_Object;

                RtlCopyMemory(pDescriptor,
                              &pResource->m_Descriptor,
                              sizeof(pResource->m_Descriptor));
                pDescriptor++;
            }
        }
    }

    return pWdmResourceList;
}