how to determine some cellview is editing by somebody else?

Hi Alvin,

 Once the cellview is edited by someone, cadence will locked it down to avoid other user from editing it. If you want to play safe for your code, you can perform checking before proceed. Example:

if( cv = dbOpenCellViewByType( libName cellName viewName "maskLayout" "a") then

    ; Start your code here, coz you managed to edit it

else

    error("Failed to open cellview in edit mode. Mission aborted\n")

);if

Thank you for your reply and example code....

Sorry to say your code does not work correctly.....

ex:

cv = dbOpenCellViewByType( "V1_55P0_FHD_C502_R06_DEC2012_Panel_AELA" "pixel_unit" "layout" "maskLayout" "a" ) ;open DB
*WARNING* (DB-270000): dbOpenCellViewByType: Unable to lock database file for V1_55P0_FHD_C502_R06_DEC2012_Panel_AELA/pixel_unit/layout
db:0x1c1b3d9a

"pixel_unit" is editing by somebody else but cv does not return NILL but DB code (db:0x1c1b3d9a)....

Just warning "Unable to lock database"  that is all....;

C/F : In case of without writing permission, cv returns nill. your code works correct. Thank you.

 Maybe 'geGetLockInfo' is what you are looking for.

What version of the tools are you using? I have a vague recollection of this problem - but even going back a few releases I can't see it - it always returns nil for me for a locked cellView.

One way to check would be to see if cv~>mode=="a" after the open - it will be "r" if it opened it readonly.

You could also use the ddLock functions - but I would first try to get to the bottom of what version you are using and why this is happening, rather than trying to code around it. getVersion(t) will give the version details that I need to see.

Thanks,

Andrew.

Hi Andrew...

Cadence version is IC6.1.4-64b.500.11

after dbOpenCellViewByType function, check it's mode "r" or "a" again. It works good. thank you.

I discovered what the problem is - if the cellView has already been opened in readonly, and then you try to open it for "a" (append) mode, it now (even in IC615) returns the dbObject of the cellView.

I have filed a CCR to get this corrected, as it's a difference in behaviour from IC5141.

Regards,

Andrew.

Thank you.

 geGetLockInfo funcition helps me!