Once an application enters the PLAPACK API-active state, linear algebra objects can be opened for access in a shared-memory like environment. The PLA_Obj_API_open call initializes the mechanism for a specific object and PLA_Obj_API_close finalizes it. place HR here
place HR here The above calls should be regarded as barriers: all nodes in the PLAPACK base communicator must make the call.
The mode (open or closed) of an object can be queried with the call place HR here
place HR here This will return
PLA_MODE_OPEN. While the object is open, the calls described in the next sections can be used to access its contents.