Table of Contents
ptype - mbk list of typed pointers
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.
mbk(1)
, addptype(3)
, freeptype(3)
, getptype(3)
, delptype(3)
.
This tool is under development at the ASIM/LIP6/UPMC laboratory, cao-vlsi
research team.
We need your feedbak to improve documentation and tools.
If you find bugs, please fill-in the form at
http://asim.lip6.fr/alliance/support/bug-report/
Thanks for doing this.
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page maintained by Czo [Olivier Sirol]
, last updated on 26 May 2000.