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authorMartin Sustrik <sustrik@250bpm.com>2012-02-16 10:01:47 +0900
committerMartin Sustrik <sustrik@250bpm.com>2012-02-16 10:01:47 +0900
commit4a7aad06d95701cf232198093ce396dcdbb53e5b (patch)
tree8ced8929e603a179d9434099244dfd782e705d5e /doc/xs_msg_copy.txt
parent1fc63e4dbcf1438eb571d720f57be68852f820f7 (diff)
ZeroMQ renamed to Crossroads
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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+xs_msg_copy(3)
+==============
+
+
+NAME
+----
+xs_msg_copy - copy content of a message to another message
+
+
+SYNOPSIS
+--------
+*int xs_msg_copy (xs_msg_t '*dest', xs_msg_t '*src');*
+
+
+DESCRIPTION
+-----------
+The _xs_msg_copy()_ function shall copy the message object referenced by 'src'
+to the message object referenced by 'dest'. The original content of 'dest', if
+any, shall be released.
+
+CAUTION: The implementation may choose not to physically copy the message
+content, rather to share the underlying buffer between 'src' and 'dest'. Avoid
+modifying message content after a message has been copied with
+_xs_msg_copy()_, doing so can result in undefined behaviour. If what you need
+is an actual hard copy, allocate a new message using _xs_msg_init_size()_ and
+copy the message content using _memcpy()_.
+
+CAUTION: Never access 'xs_msg_t' members directly, instead always use the
+_xs_msg_ family of functions.
+
+
+RETURN VALUE
+------------
+The _xs_msg_copy()_ function shall return zero if successful. Otherwise it
+shall return `-1` and set 'errno' to one of the values defined below.
+
+
+ERRORS
+------
+*EFAULT*::
+Invalid message.
+
+
+SEE ALSO
+--------
+linkxs:xs_msg_move[3]
+linkxs:xs_msg_init[3]
+linkxs:xs_msg_init_size[3]
+linkxs:xs_msg_init_data[3]
+linkxs:xs_msg_close[3]
+linkxs:xs[7]
+
+
+AUTHORS
+-------
+The Crossroads documentation was written by Martin Sustrik <sustrik@250bpm.com>
+and Martin Lucina <martin@lucina.net>.