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authorMartin Hurton <hurtonm@gmail.com>2010-02-10 17:14:21 +0100
committerMartin Hurton <hurtonm@gmail.com>2010-02-10 17:14:21 +0100
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treefa926432b8392e7717b7fbc1ecaf973ba60cb970 /man/man7/zmq_cl.7
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parent354efc513fdb4096f8830e6c2e3e8f1311303e61 (diff)
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-.TH zmq_cl 7 "" "(c)2007-2010 iMatix Corporation" "0MQ User Manuals"
-.SH NAME
-0MQ Common Lisp API \- interface between 0MQ and Common Lisp applications
-.SH SYNOPSIS
-
-This manual page explains how Common Lisp API maps to underlying C
-API.
-
-Common Lisp API repeats C API in general. All constants defined with C
-API are available with Common Lisp API. C names are mapped to lisp
-names by these rules: a) all names are `zmq' namespace; b) all names
-are in lower case; c) underscores translate to dashes.
-
-Example of mappings:
-
-.IR zmq_msg_init_data
-maps to
-.IR zmq:msg-init-data
-
-.IR ZMQ_PUB
-maps to
-.IR zmq:pub
-
-To learn about individual functions and parameters check
-appropriate C API manual pages.
-
-For example, to understand
-.IR zmq:setsockopt
-function check
-.BR zmq_setsockopt(3) .
-
-.SH Data structures
-Data structures are wrapped into CLOS classes with automatic memory
-management. 0MQ describes two such structures:
-.IR msg_t
-and
-.IR pollitem_t .
-
-Message constructor supports keywords
-.IR :size
-and
-.IR :data.
-Keyword :size specifies the size of
-message. Keyword :data specifies initial contents of message, and it
-can be either string or 8-bit array. For example:
-
-* (make-instance 'zmq:msg :data #(1 2 3))
-
-creates a message with 3 bytes '1, 2, 3' in it.
-
-.SH Accessing message data
-
-There 3 functions to read message body in different forms:
-msg-data-as-string, msg-data-as-array and msg-data-as-is, returning
-data as string, as array and as raw foreign pointer to underlaying
-buffer respectively. For example:
-
-* (zmq:msg-data-as-array msg)
-
-returns #(1 2 3) for message from previous example.
-
-It is possible to access underlying foreign object via class slot
-named `raw'.
-
-* (slot-value obj 'zmq:raw)
-
-or, if `obj' is of known type `msg':
-
-* (zmq:msg-raw obj)
-
-.SH Macros
-There are several macroses to help with managing zeromq objects:
-
-.SH with-context
-Macro
-.IR with-context
-creates 0MQ context and requires 3 obligatory arguments: context name,
-number of application threads and number of input/output
-threads. Optional parameter `flags' can be also supplied, see
-.BR zmq_init(3) .
-Context is terminated implicitly at the end of macro block.
-
-.SH with-socket
-Macro
-.IR with-socket
-creates 0MQ socket within given context. Requires 3 arguments: socket
-name, context name and socket type. See
-.BR zmq_socket(3) .
-Socket is closed implicitly at the end of macro block.
-
-.SH with-polls
-Macro
-.IR with-polls
-creates 0MQ polls, containing different sets of pollitems. For
-example, to create two poll sets for network pipes:
-
-* (zmq:with-polls ((poll1 . ((sock1 . zmq:pollin)
- (sock2 . zmq:pollout)))
- (poll2 . ((sock1 . zmq:pollout)
- (sock2 . zmq:pollin))))
-
- (process-sockets (zmq:poll poll-set1))
-
- (process-sockets (zmq:poll poll-set2)))
-
-Note,
-.IR zmq:poll
-returns list of revents for sockets from given poll set.
-
-Polls are closed implicitly at the end of macro block.
-
-.SH EXAMPLE
-.nf
-
-(zmq::with-context (ctx 1 1)
- (zmq:with-socket (s ctx zmq:pub)
- (zmq:connect s "tcp://192.168.0.115:5555")
- (zmq:send s (make-instance 'zmq:msg :data "Hello, world!"))))
-
-.SH "SEE ALSO"
-.BR zmq(7)
-.SH AUTHOR
-Martin Sustrik <sustrik at 250bpm dot com>,
-Vitaly Mayatskikh <v dot mayatskih at gmail dot com>