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128 lines
4.8 KiB
128 lines
4.8 KiB
5 years ago
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'\" t
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.\" Title: zactor
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.\" Author: [see the "AUTHORS" section]
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.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/>
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.\" Date: 12/31/2016
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.\" Manual: CZMQ Manual
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.\" Source: CZMQ 4.0.2
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.\" Language: English
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.\"
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.TH "ZACTOR" "3" "12/31/2016" "CZMQ 4\&.0\&.2" "CZMQ Manual"
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.\" -----------------------------------------------------------------
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.\" * Define some portability stuff
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.\" -----------------------------------------------------------------
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.\" http://bugs.debian.org/507673
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.ie \n(.g .ds Aq \(aq
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.el .ds Aq '
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.\" -----------------------------------------------------------------
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.\" * set default formatting
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.\" -----------------------------------------------------------------
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.\" disable hyphenation
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.nh
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.\" disable justification (adjust text to left margin only)
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.ad l
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.\" -----------------------------------------------------------------
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.\" * MAIN CONTENT STARTS HERE *
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.\" -----------------------------------------------------------------
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.SH "NAME"
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zactor \- simple actor framework
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.SH "SYNOPSIS"
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.sp
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.nf
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// This is a stable class, and may not change except for emergencies\&. It
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// is provided in stable builds\&.
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// Actors get a pipe and arguments from caller
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typedef void (zactor_fn) (
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zsock_t *pipe, void *args);
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// Create a new actor passing arbitrary arguments reference\&.
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CZMQ_EXPORT zactor_t *
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zactor_new (zactor_fn task, void *args);
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// Destroy an actor\&.
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CZMQ_EXPORT void
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zactor_destroy (zactor_t **self_p);
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// Send a zmsg message to the actor, take ownership of the message
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// and destroy when it has been sent\&.
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CZMQ_EXPORT int
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zactor_send (zactor_t *self, zmsg_t **msg_p);
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// Receive a zmsg message from the actor\&. Returns NULL if the actor
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// was interrupted before the message could be received, or if there
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// was a timeout on the actor\&.
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// Caller owns return value and must destroy it when done\&.
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CZMQ_EXPORT zmsg_t *
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zactor_recv (zactor_t *self);
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// Probe the supplied object, and report if it looks like a zactor_t\&.
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CZMQ_EXPORT bool
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zactor_is (void *self);
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// Probe the supplied reference\&. If it looks like a zactor_t instance,
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// return the underlying libzmq actor handle; else if it looks like
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// a libzmq actor handle, return the supplied value\&.
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CZMQ_EXPORT void *
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zactor_resolve (void *self);
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// Return the actor\*(Aqs zsock handle\&. Use this when you absolutely need
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// to work with the zsock instance rather than the actor\&.
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CZMQ_EXPORT zsock_t *
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zactor_sock (zactor_t *self);
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// Self test of this class\&.
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CZMQ_EXPORT void
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zactor_test (bool verbose);
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Please add \*(Aq@interface\*(Aq section in \*(Aq\&./\&.\&./src/zactor\&.c\*(Aq\&.
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.fi
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.SH "DESCRIPTION"
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.sp
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The zactor class provides a simple actor framework\&. It replaces the CZMQ zthread class, which had a complex API that did not fit the CLASS standard\&. A CZMQ actor is implemented as a thread plus a PAIR\-PAIR pipe\&. The constructor and destructor are always synchronized, so the caller can be sure all resources are created, and destroyed, when these calls complete\&. (This solves a major problem with zthread, that a caller could not be sure when a child thread had finished\&.)
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.sp
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A zactor_t instance acts like a zsock_t and you can pass it to any CZMQ method that would take a zsock_t argument, including methods in zframe, zmsg, zstr, and zpoller\&. (zloop somehow escaped and needs catching\&.)
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.sp
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An actor function MUST call zsock_signal (pipe) when initialized and MUST listen to pipe and exit on $TERM command\&.
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.sp
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Please add \fI@discuss\fR section in \fI\&./\&.\&./src/zactor\&.c\fR\&.
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.SH "EXAMPLE"
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.PP
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\fBFrom zactor_test method\fR.
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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zactor_t *actor = zactor_new (echo_actor, "Hello, World");
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assert (actor);
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zstr_sendx (actor, "ECHO", "This is a string", NULL);
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char *string = zstr_recv (actor);
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assert (streq (string, "This is a string"));
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free (string);
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zactor_destroy (&actor);
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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.SH "AUTHORS"
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.sp
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The czmq manual was written by the authors in the AUTHORS file\&.
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.SH "RESOURCES"
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.sp
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Main web site: \m[blue]\fB\%\fR\m[]
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.sp
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Report bugs to the email <\m[blue]\fBzeromq\-dev@lists\&.zeromq\&.org\fR\m[]\&\s-2\u[1]\d\s+2>
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.SH "COPYRIGHT"
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.sp
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Copyright (c) the Contributors as noted in the AUTHORS file\&. This file is part of CZMQ, the high\-level C binding for 0MQ: http://czmq\&.zeromq\&.org\&. This Source Code Form is subject to the terms of the Mozilla Public License, v\&. 2\&.0\&. If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla\&.org/MPL/2\&.0/\&. LICENSE included with the czmq distribution\&.
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.SH "NOTES"
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.IP " 1." 4
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zeromq-dev@lists.zeromq.org
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.RS 4
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\%mailto:zeromq-dev@lists.zeromq.org
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.RE
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