diff options
Diffstat (limited to 'lib/kernel/doc/src/gen_tcp.xml')
| -rw-r--r-- | lib/kernel/doc/src/gen_tcp.xml | 31 |
1 files changed, 26 insertions, 5 deletions
diff --git a/lib/kernel/doc/src/gen_tcp.xml b/lib/kernel/doc/src/gen_tcp.xml index 83242c2df8..070782e1f3 100644 --- a/lib/kernel/doc/src/gen_tcp.xml +++ b/lib/kernel/doc/src/gen_tcp.xml @@ -4,7 +4,7 @@ <erlref> <header> <copyright> - <year>1997</year><year>2016</year> + <year>1997</year><year>2017</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -140,6 +140,23 @@ do_recv(Sock, Bs) -> <fsummary>Close a TCP socket.</fsummary> <desc> <p>Closes a TCP socket.</p> + <p>Note that in most implementations of TCP, doing a <c>close</c> does + not guarantee that any data sent is delivered to the recipient before + the close is detected at the remote side. If you want to guarantee + delivery of the data to the recipient there are two common ways to + achieve this.</p> + <list type="ordered"> + <item><p>Use <seealso marker="#shutdown/2"> + <c>gen_tcp:shutdown(Sock, write)</c></seealso> to signal that + no more data is to be sent and wait for the read side of the + socket to be closed.</p> + </item> + <item><p>Use the socket option <seealso marker="inet#packet"> + <c>{packet, N}</c></seealso> (or something similar) to make + it possible for the receiver to close the connection when it + knowns it has received all the data.</p> + </item> + </list> </desc> </func> @@ -216,7 +233,7 @@ do_recv(Sock, Bs) -> time-out in milliseconds. Defaults to <c>infinity</c>.</p> <note> <p>The default values for options specified to <c>connect</c> can - be affected by the <c>Kernel</c> configuration parameter + be affected by the Kernel configuration parameter <c>inet_default_connect_options</c>. For details, see <seealso marker="inet"><c>inet(3)</c></seealso>.</p> </note> @@ -231,7 +248,11 @@ do_recv(Sock, Bs) -> <c><anno>Socket</anno></c>. The controlling process is the process that receives messages from the socket. If called by any other process than the current controlling process, - <c>{error, not_owner}</c> is returned.</p> + <c>{error, not_owner}</c> is returned. If the process identified + by <c><anno>Pid</anno></c> is not an existing local pid, + <c>{error, badarg}</c> is returned. <c>{error, badarg}</c> may also + be returned in some cases when <c><anno>Socket</anno></c> is closed + during the execution of this function.</p> <p>If the socket is set in active mode, this function will transfer any messages in the mailbox of the caller to the new controlling process. @@ -293,7 +314,7 @@ do_recv(Sock, Bs) -> <seealso marker="#accept/1"><c>accept/1,2</c></seealso>.</p> <note> <p>The default values for options specified to <c>listen</c> can - be affected by the <c>Kernel</c> configuration parameter + be affected by the Kernel configuration parameter <c>inet_default_listen_options</c>. For details, see <seealso marker="inet"><c>inet(3)</c></seealso>.</p> </note> @@ -307,7 +328,7 @@ do_recv(Sock, Bs) -> <type_desc variable="HttpPacket">See the description of <c>HttpPacket</c> in <seealso marker="erts:erlang#decode_packet/3"><c>erlang:decode_packet/3</c></seealso> - in <c>ERTS</c>. + in ERTS. </type_desc> <desc> <p>Receives a packet from a socket in passive |