os.lockinfo - Function

get info about table use and locking

Synopsis
lockinfo(tablename)

Description
Get info about use and locking of a table. If so, give the pid of the process using or locking it. The function showtableuse uses this function to print a message about the use and locking of a table.

It returns a vector of 3 integer elements. The first element tells if the table is used or locked.
0 = not used
1 = used, but not locked
2 = read-locked
3 = write-locked
The second element gives the pid of the process using or locking the table.
The third element is 1 if the lock is permanent (otherwise 0).

Note that multiple processes can use a table or hold a read-lock. This function gives the pid of only one of those processes.

Example
Note that this example is done better by function showtableuse.

  res := dos.lockinfo ('~/aips++/test/hol.ms');
  if (res[1] != 0) {
    print (paste ('The table is used (and maybe locked) by process', res[2]));
  }

Arguments

tablename	in	table name
		Allowed:	string

Returns
vector of 2 integers or fail

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	Package	utility
	Module	misc
	Tool	os