diff options
Diffstat (limited to 'erts/doc/src/erlang.xml')
| -rw-r--r-- | erts/doc/src/erlang.xml | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml index e78ded4ae1..0d94f83493 100644 --- a/erts/doc/src/erlang.xml +++ b/erts/doc/src/erlang.xml @@ -1269,6 +1269,42 @@ end</code> data is available by calling <seealso marker="erlang#dist_ctrl_get_data_notification/1"><c>erlang:dist_ctrl_get_data_notification(DHandle)</c></seealso>. </p> + <p>The returned value when there are data available depends + on the value of the <c>get_size</c> option configured on the + distribution channel identified by <c><anno>DHandle</anno></c>. + For more information see the documentation of the <c>get_size</c> + option for the + <seealso marker="#dist_ctrl_set_opt/3"><c>erlang:dist_ctrl_set_opt/3</c></seealso> + function.</p> + <note><p> + Only the process registered as distribution + controller for the distribution channel identified by + <c><anno>DHandle</anno></c> is allowed to call this + function. + </p></note> + <p> + This function is used when implementing an alternative + distribution carrier using processes as distribution + controllers. <c><anno>DHandle</anno></c> is retrived + via the callback + <seealso marker="erts:alt_dist#hs_data_f_handshake_complete"><c>f_handshake_complete</c></seealso>. + More information can be found in the documentation of + <seealso marker="erts:alt_dist#distribution_module">ERTS + User's Guide ➜ How to implement an Alternative Carrier + for the Erlang Distribution ➜ Distribution Module</seealso>. + </p> + </desc> + </func> + + <func> + <name name="dist_ctrl_get_opt" arity="2" clause_i="1" since="OTP @OTP-15617@"/> + <fsummary>Get value of the get_size option on a distribution channel</fsummary> + <desc> + <p>Returns the value of the <c>get_size</c> option on the distribution channel + identified by <c><anno>DHandle</anno></c>. For more information see the + documentation of the <c>get_size</c> option for the + <seealso marker="#dist_ctrl_set_opt/3"><c>erlang:dist_ctrl_set_opt/3</c></seealso> + function.</p> <note><p> Only the process registered as distribution controller for the distribution channel identified by @@ -1392,6 +1428,55 @@ end</code> </func> <func> + <name name="dist_ctrl_set_opt" arity="3" clause_i="1" since="OTP @OTP-15617@"/> + <fsummary>Set value of the get_size option on a distribution channel</fsummary> + <desc> + <p>Sets the value of the <c>get_size</c> option on the distribution channel + identified by <c><anno>DHandle</anno></c>. This option controls the return + value of calls to + <seealso marker="#dist_ctrl_get_data/1">erlang:dist_ctrl_get_data(<anno>DHandle</anno>)</seealso> + where <c><anno>DHandle</anno></c> equals <c><anno>DHandle</anno></c> used + when setting this option. + When the <c>get_size</c> option is:</p> + <taglist> + <tag><c>false</c></tag> + <item> + and there are distribution data available, a call to + <c>erlang:dist_ctrl_get_data(<anno>DHandle</anno>)</c> + will just return <c>Data</c> to pass over the channel. + This is the default value of the <c>get_size</c> option. + </item> + <tag><c>true</c></tag> + <item> + and there are distribution data available, a call to + <c>erlang:dist_ctrl_get_data(<anno>DHandle</anno>)</c> + will return <c>Data</c> to pass over the channel as well as + the <c>Size</c> of <c>Data</c> in bytes. This is returned as + a tuple on the form <c>{Size, Data}</c>. + </item> + </taglist> + <p>All options are set to default when a channel is closed.</p> + <note><p> + Only the process registered as distribution + controller for the distribution channel identified by + <c><anno>DHandle</anno></c> is allowed to call this + function. + </p></note> + <p> + This function is used when implementing an alternative + distribution carrier using processes as distribution + controllers. <c><anno>DHandle</anno></c> is retrived + via the callback + <seealso marker="erts:alt_dist#hs_data_f_handshake_complete"><c>f_handshake_complete</c></seealso>. + More information can be found in the documentation of + <seealso marker="erts:alt_dist#distribution_module">ERTS + User's Guide ➜ How to implement an Alternative Carrier + for the Erlang Distribution ➜ Distribution Module</seealso>. + </p> + </desc> + </func> + + <func> <name name="element" arity="2" since=""/> <fsummary>Return the Nth element of a tuple.</fsummary> <type_desc variable="N">1..tuple_size(<anno>Tuple</anno>)</type_desc> |