pg(3erl) [linux man page]

pg(3erl)						     Erlang Module Definition							  pg(3erl)

NAME

       pg - Distributed, Named Process Groups

DESCRIPTION

       This  (experimental)  module  implements process groups. A process group is a group of processes that can be accessed by a common name. For
       example, a group named foobar can include a set of processes as members of this group and they can be located on different nodes.

       When messages are sent to the named group, all members of the group receive the message. The messages are serialized.  If  the  process	P1
       sends  the message M1 to the group, and process P2 simultaneously sends message M2 , then all members of the group receive the two messages
       in the same order. If members of a group terminate, they are automatically removed from the group.

       This module is not complete. The module is inspired by the ISIS system and the causal order protocol of the  ISIS  system  should  also	be
       implemented. At the moment, all messages are serialized by sending them through a group master process.

EXPORTS

       create(PgName) -> ok | {error, Reason}

	      Types  PgName = term()
		     Reason = already_created | term()

	      Creates an empty group named PgName on the current node.

       create(PgName, Node) -> ok | {error, Reason}

	      Types  PgName = term()
		     Node = node()
		     Reason = already_created | term()

	      Creates an empty group named PgName on the node Node .

       join(PgName, Pid) -> Members

	      Types  PgName = term()
		     Pid = pid()
		     Members = [pid()]

	      Joins the pid Pid to the process group PgName . Returns a list of all old members of the group.

       send(PgName, Msg) -> void()

	      Types  PgName = Msg = term()

	      Sends the tuple {pg_message, From, PgName, Msg} to all members of the process group PgName .

	      Failure: {badarg, {PgName, Msg}} if PgName is not a process group (a globally registered name).

       esend(PgName, Msg) -> void()

	      Types  PgName = Msg = term()

	      Sends the tuple {pg_message, From, PgName, Msg} to all members of the process group PgName , except ourselves.

	      Failure: {badarg, {PgName, Msg}} if PgName is not a process group (a globally registered name).

       members(PgName) -> Members

	      Types  PgName = term()
		     Members = [pid()]

	      Returns a list of all members of the process group PgName .

Ericsson AB							   stdlib 1.17.3							  pg(3erl)

snmpa_network_interface(3erl)				     Erlang Module Definition				     snmpa_network_interface(3erl)

NAME

       snmpa_network_interface - Behaviour module for the SNMP agent network interface.

DESCRIPTION

       This  module  defines  the  behaviour  of the agent network interface. A snmpa_network_interface compliant module must export the following
       functions:

	 * start_link/4

	 * info/1

	 * get_log_type/1

	 * set_log_type/2

	 * verbosity/2

       The semantics of them and their exact signatures are explained below.

       But this is not enough. There is also a set of mandatory messages which the network interface entity must be able to receive and be able to
       send. This is described in chapter snmp_agent_netif .

EXPORTS

       start_link(Prio, NoteStore, MasterAgent, Opts) -> {ok, Pid} | {error, Reason}

	      Types  Prio = priority()
		     NoteStore = pid()
		     MasterAgent = pid()
		     Opts = [opt()]
		     opt() = {verbosity, verbosity()} | {versions, versions()} | term()
		     versions() = [version()]
		     version() = v1 | v2 | v3

	      Start-link the network interface process.

	      NoteStore is the pid of the note-store process and MasterAgent is the pid of the master-agent process.

	      Opts  is	an  (basically)  implementation  dependent list of options to the network interface process. There are however a number of
	      options which must be handled: versions and verbosity .

       info(Pid) -> [{Key, Value}]

	      Types  Pid = pid()

	      The info returned is basically up to the implementer to decide. This implementation provided by the application provides info  about
	      memory allocation and various socket information.

	      The  info  returned  by  this  function is returned together with other info collected by the agent when the info function is called
	      (tagged with with the key net_if ).

       verbosity(Pid, Verbosity) -> void()

	      Types  Pid = pid()
		     Verbosity = verbosity()

	      Change the verbosity of a running network interface process.

       get_log_type(Pid) -> {ok, LogType} | {error, Reason}

	      Types  Pid = pid()
		     LogType = atl_type()
		     Reason = term()

	      The Audit Trail Log is managed by the network interface process. So, it is this process that has to retrieve the actual log-type.

       set_log_type(Pid, NewType) -> {ok, OldType} | {error, Reason}

	      Types  Pid = pid()
		     NewType = OldType = atl_type()
		     Reason = term()

	      The Audit Trail Log is managed by the network interface process. So, it is this process that has to do the actual  changing  of  the
	      type.

	      See set_log_type for more info.

Ericsson AB							     snmp 4.19					     snmpa_network_interface(3erl)