EnqueueCxObj

insert a commodity object within a list of objects based on object priority. (V36)

This function puts object 'co' into the list of object 'headObj'. The insertion point is determined by the object's priority. The objects are kept in the list from the highest priority to the lowest. New nodes are inserted in front of the first node with a lower priority. Hence a FIFO queue for nodes of equal priority.

The priority of the commodity object can be set using SetCxObjPri().

headObj

pointer to a list of objects. If this value is NULL, then the entire tree of objects pointed to by 'co' is deleted and becomes invalid.

co

the object to add to the list (may be NULL)

If 'co' is NULL, this function will record that fact in the internal accumulated error of 'headObj'. This error record can be retrieved using CxObjError() and cleared using ClearCxObjError().

Until V38, passing a NULL 'headObj' parameter would cause low-memory access and unpredictable results.

SetCxObjPri(), CxObjError(), ClearCxObjError()