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How to determine your calling environment

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Does anyone know how to determine the environment a procedure was called from? There are many ways to call Skill code:

icfb, pipo, si, dbAccess, cdsCopyShell, etc.

Is there a way to know whether the Skill is running in icfb, pipo or cdsCopyShell? We have a very elaborate set of pcells and our technology library has a libInit file that takes several seconds to load. This is not a big deal in the Cadence environment since it happpens only once at the start of the session. However, if I call the ccpRename command to rename a lot of cells, I noticed that it spawns a sub-process for each rename and each sub-process calls the libInit.il. To do 100 renames will add 5 seconds of overhead per call. However, in this situation, the libInit.il code isn't even needed. Ideally, I would like the libInit.il code to selectively evaluate certain parts of the code depending on the calling environment. In the case of ccp sub-processes, I would do nothing. In the case of si, I would do a few schematic/netlist related things. In the case of pipo I would do all of the layout pcell things. In icfb, all of the libInit.il would be evaluated.


Originally posted in cdnusers.org by dmay

  • You could use the output of getVersion() to determine this.

    Andrew.


    Originally posted in cdnusers.org by adbeckett

  • Or use isCallable('funcName) to determine whether a particular function is available. If you pick layout editor or schematic editor functions, these won't exist in pipo, cdsCopyShell, dbAccess etc.

    That could be a better approach, and depends less on parsing a version string.

    Andrew.


    Originally posted in cdnusers.org by adbeckett

  • Thanks Andrew. I think the getVersion() will work best. It would be harder to differentiate between cdsCopyShell, pipo and dbAccess using the isCallable command unless I could find a function that was available in one but not the other. A parseString on getVersion would be the easiest.

    -Derek


    Originally posted in cdnusers.org by dmay

  • I assumed you didn't really need to differentiate with that level of granularity - which was why I suggested the isCallable approach.

    Either way, take your pick...

    Andrew.


    Originally posted in cdnusers.org by adbeckett

  • getVersion() is definitely the best way, but would parsing the environment variable CDS_MPS_SESSION also work?


    Originally posted in cdnusers.org by ahamlett

  • CDS_MPS_SESSION will not be defined all the tine (dbAccess wouldn't have it, since it has no MPS support, for example), and also could be inherited from the parent application. So I don't think this is a good idea. Plus it's not documented...

    Andrew.


    Originally posted in cdnusers.org by adbeckett

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