VOID NTAPI GDIOBJ_vDereferenceObject ( POBJ pobj )

Definition at line 475 of file gdiobj.c.

Referenced by BITMAP_CopyBitmap(), GDIOBJ_ConvertToStockObj(), GDIOBJ_ReferenceObjectByHandle(), GDIOBJ_vDeleteObject(), GreDeleteObject(), GreGetObject(), GreIsHandleValid(), GreSetObjectOwner(), IntGdiSetMetaRgn(), and NtGdiSetColorSpace().

{
    ULONG cRefs, ulIndex;

    /* Calculate the index */
    ulIndex = GDI_HANDLE_GET_INDEX(pobj->hHmgr);

    /* Check if the object has a handle */
    if (ulIndex)
    {
        /* Decrement reference count */
        ASSERT((gpaulRefCount[ulIndex] & REF_MASK_COUNT) > 0);
        cRefs = InterlockedDecrement((LONG*)&gpaulRefCount[ulIndex]);
        DBG_LOGEVENT(&pobj->slhLog, EVENT_DEREFERENCE, cRefs);

        /* Check if we reached 0 and handle bit is not set */
        if ((cRefs & REF_MASK_INUSE) == 0)
        {
            /* Make sure it's ok to delete the object */
            ASSERT(pobj->BaseFlags & BASEFLAG_READY_TO_DIE);

            /* Check if the handle was process owned */
            if (gpentHmgr[ulIndex].ObjectOwner.ulObj != GDI_OBJ_HMGR_PUBLIC &&
                gpentHmgr[ulIndex].ObjectOwner.ulObj != GDI_OBJ_HMGR_NONE)
            {
                /* Decrement the process handle count */
                ASSERT(gpentHmgr[ulIndex].ObjectOwner.ulObj ==
                       HandleToUlong(PsGetCurrentProcessId()));
                DecrementGdiHandleCount();
            }

            /* Push entry to the free list */
            ENTRY_vPushFreeEntry(&gpentHmgr[ulIndex]);

            /* Free the object */
            GDIOBJ_vFreeObject(pobj);
        }
    }
    else
    {
        /* Decrement the objects reference count */
        ASSERT(pobj->ulShareCount > 0);
        cRefs = InterlockedDecrement((LONG*)&pobj->ulShareCount);
        DBG_LOGEVENT(&pobj->slhLog, EVENT_DEREFERENCE, cRefs);

        /* Check if we reached 0 */
        if (cRefs == 0)
        {
            /* Free the object */
            GDIOBJ_vFreeObject(pobj);
        }
    }
}

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