HDS_LOCK - Lock container file

Description:

Lock a container file in update mode; this protects the file from being accessed by other writers. The file remains explicitly locked until HDS_FREE is called or until the file is physically closed.

Invocation:

CALL HDS_LOCK( LOC, STATUS )

Arguments:

LOC = CHARACTER * ( DAT__SZLOC ) (Given)

Locator to the container file's top-level object.

STATUS = INTEGER (Given and Returned)

The global status.