NAME¶
ptype - mbk list of typed pointers
DESCRIPTION¶
The
ptype is used to save typed pointers in a list. The use of this
structure is strongly recommanded, when such a need occurs. It is the case in
the
USER field of all mbk layout and netlist objects, where data
specific to different proccessing may be accessed through this unique field.
It is the charge of the user to give its pointers a type that will not collide
with existing types.
The declarations needed to work on
ptype are available in the header file
"/labo/include/mut315.h", where '
315' is the actual
mbk version.
The following C structure describes the list of typed pointers :
typedef struct ptype {
struct ptype ∗NEXT;
void ∗DATA;
long TYPE;
} ptype_list;
- NEXT
- Pointer to the next ptype of the list.
- DATA
- Generic pointer that may point where the user wants to.
- TYPE
- Identifier of the user of the pointed data. One shall not access someone
else ptype since it doesn't know what's in it. This means also that
a ptype user should free the space taken by its datas since it is
the only one to know how to do it.
- Remark 1:
- a specialized memory allocator has been built in order to create and free
ptype_lists, so absolutly avoid to create or free them an other way
than through the access functions.
- Remark 2:
- Now a day, three tools are known to use the USER field of some mbk
structures :
- VTIPARSER
- the parser of vti physical format '.cp' files uses the
phcon(3) USER field.
- LOFIGCHAIN
- the lofigchain function constructs a dual representation of the
netlist in the USER field of the losig(3) structure.
- PLACEABOX
- Genlib's physical placement functions, in order to have model sizes in
instances. It uses the phins(3) USER field.
SEE ALSO¶
mbk(1),
addptype(3),
freeptype(3),
getptype(3),
delptype(3).
BUG REPORT¶
This tool is under development at the
ASIM department of the
LIP6
laboratory.
We need your feedback to improve documentation and tools.