inviso_lfm_tpfreader(3erl) [linux man page]

inviso_lfm_tpfreader(3erl)				     Erlang Module Definition					inviso_lfm_tpfreader(3erl)

NAME

       inviso_lfm_tpfreader - Inviso Standard Reader Process to Standard Logfile Merger

DESCRIPTION

       Implements the standard reader process to the standard logfile merger inviso_lfm .

       The  reader  process reads logfiles belonging to the same set (normally one node) in chronological order and delivers logged trace messages
       one by one to the output process. Before any trace messages are delivered, the inviso_lfm_tpreader implementation reads	the  entire  trace
       information file (if in use) and builds a database over pid-to-alias associations.

       The  inviso_lfm_tpreader  implementation  is capable of considering that an alias may have been used for several processes during different
       times. An alias may also be in use for several pids at the same time, on purpose. If a process has generated a trace message, all  associa-
       tions between that pid and aliases will be presented as the list PidMappings in the message sent to the output process.

EXPORTS

       handle_logfile_sort_wrapset(LogFiles) -> FileList2

	      Types  LogFiles = [{trace_log, FileList}]
		     FileList = FileList2 = [FileName]
		     FileName = string()

	      Only one {trace_log, FileList} tuple is expected in LogFiles , all other tuples are ignored. FileList must:

		* contain one single file name, or

		* a list of wraplog files, following the naming convention <Prefix><Nr><Suffix> .

	      Sorts  the  files  in  FileList  in chronological order beginning with the oldest. Sorting is only relevant if FileList is a list of
	      wraplogs. The sorting is done on finding the modulo-counter in the filename and not on filesystem timestamps.

	      This function is exported for convenience should an own reader process be implemented.

THE TRACE INFORMATION FILE PROTOCOL

       The format of a trace information file is dictated by the meta tracer process. The inviso_lfm_tpfreader implementation of a reader  process
       understands  the  following  trace  information	entries. Note that the inviso_rt_meta trace information file is on binary format prefixing
       every entry with a 4 byte length indicator.

	 {Pid, Alias, alias, NowStamp} :
	   Pid = pid()
	   Alias = term()
	   NowStamp = term() , but in current implementation as returned from erlang:now/0

	   This message indicates that from now on shall Pid be associated with Alias .

	 {MaybePid, Alias, unalias, NowStamp} :
	   MaybePid = pid() | undefined
	   Alias = term()
	   NowStamp = term() , see above

	   This message indicates that, if MaybePid is a pid, this pid shall no longer be associated with Alias . If it is undefined , all associ-
	   ations with Alias from now shall be considered invalid.

	   Also  note  that  there  are many situations where unalias entries will be missing. For instance if a process terminates without making
	   explicit function calls removing its associations first. This is seldom a problem unless the pid is reused.

Ericsson AB							   inviso 0.6.2 					inviso_lfm_tpfreader(3erl)

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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)

Linux and UNIX Man Pages

inviso_lfm_tpfreader(3erl) [linux man page]

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