Siemens V4.0 manual Process lmx.ctrl

Advanced Server for UNIX architecture Process model

The process lmx.ctrl

The process lmx.ctrl manages the individual server processes and undertakes those tasks which cannot be directly allocated to a workstation. Several tasks are carried out within the process which are not controlled by the operating system scheduler (as the process is) but which assume control alternately. The individual tasks in the process lmx.ctrl are shown in the following diagram:

Named	lmx.ctrl
pipe
service	pipeserv			Server
		task0
	task			require-
				ments
	listener	mcpwork	mslot	Mailslot
	task	task	task
				tasks
New	lmx.srv	lmx.srv	lmx.srv	Message
client				datagrams
	process 1	process 2	process 3

The process lmx.ctrl

The task0 task queries events in the network or in the other processes and gives control of one of the tasks described below to the lmx.ctrl process.

The listener task reacts to incoming requests from the workstations and distributes the connection requests to the existing server process lmx.srv or, if necessary, generates a new server process.

The mslot task receives the mailslot requests and passes them on to the server. It also processes the announce requests from other servers. This task transmits the mailslot messages to the application processes on the server, which can then be read using the API function DosReadMailslot. In addition, this task manages the server function autodisconnect.

The mcpwork Task oversees all lmx.srv processes and answers administrative queries from the workstations.

The pipeserv Task coordinates transactions between server and client applications.

Product Manual U7613-J-Z815-6-76