simple linked list library
for use you have to add new prop to your struct , and name it 'link' , like this :

	struct name {
		int blabla;
		char *blabla2;
		// ***********
	->	L_LINK(struct_type) link;
		// ***********
	};

then you can use macros to change list like :

L_LINK_SPREV : set second object as prev for first object
L_LINK_SNEXT : like L_LINK_SPREV but for 'next'
L_LINK_INSERT : add new object to list , append after first object
L_LINK_REMOVE : remove object from 

and there some some usefull macros like :

L_LINK_NEXT : return next object of given object
L_LINK_PREV : prev object of given object

* NOTE that to pass args as pointer :)