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https://issues.apache.org/jira/browse/PROTON-1823?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16432676#comment-16432676
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ASF subversion and git services commented on PROTON-1823:
---------------------------------------------------------

Commit c7717a47d675bae12fcfbf31244009ddb247787c in qpid-proton's branch 
refs/heads/master from [~aconway]
[ https://git-wip-us.apache.org/repos/asf?p=qpid-proton.git;h=c7717a4 ]

PROTON-1823: [c] pn_message_send() calls pn_link_advance()

Call pn_link_advance() at the end of pn_message_send()

Since pn_message_send() can only send complete messages, it makes no sense to
call it without calling pn_link_advance().


> [c] make it easier to send a message
> ------------------------------------
>
>                 Key: PROTON-1823
>                 URL: https://issues.apache.org/jira/browse/PROTON-1823
>             Project: Qpid Proton
>          Issue Type: Improvement
>          Components: proton-c
>    Affects Versions: proton-c-0.22.0
>            Reporter: Alan Conway
>            Assignee: Alan Conway
>            Priority: Minor
>             Fix For: proton-c-0.23.0
>
>
> Encapsulates the awkward allocate-encode-expand dance required by 
> pn_message_encode()
> Supports the following 2 scenarios:
> 1. Simple: don't care about allocations, just send `pn_message_t *msg` and 
> forget it:
>     pn_message_send(msg, sender, NULL)
> 2. Efficient: re-use a buffer, buffer is allocated and expanded as required:
>     pn_rwbytes_t buffer=\{0};     // Zero initialize, libary will do the 
> allocation
>     ...
>     pn_message_send(msg, sender, &buffer); // Expand as needed
>     pn_message_send(msg2, sender2, &buffer); // etc.
>     ...
>     free(buffer->start);        // Application must do final free of buffer



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