diff options
Diffstat (limited to 'erts/doc/src/socket.xml')
| -rw-r--r-- | erts/doc/src/socket.xml | 65 |
1 files changed, 53 insertions, 12 deletions
diff --git a/erts/doc/src/socket.xml b/erts/doc/src/socket.xml index b4e22e86a8..2f7ff2fc07 100644 --- a/erts/doc/src/socket.xml +++ b/erts/doc/src/socket.xml @@ -47,14 +47,16 @@ <seealso marker="#recv_async"><c>recv/3</c></seealso> function with Timeout set to <c>nowait</c> (<c>recv(Sock, 0, nowait)</c>) when there is actually nothing to read, it will return with - <c>{ok, </c> - <seealso marker="#type-select_info"><c>SelectInfo</c></seealso><c>}</c>. + <c>{select, </c> + <seealso marker="#type-select_info"><c>SelectInfo</c></seealso><c>}</c> + (<c>SelectInfo</c> contains the + <seealso marker="socket#type-select_ref">SelectRef</seealso>). When data eventually arrives a 'select' message will be sent to the caller: </p> <taglist> <!-- NOTE THAT THE EMPTY TAG IS INTENTIONAL --> <tag></tag> - <item><c>{'$socket', socket(), select, select_ref()}</c></item> + <item><c>{'$socket', socket(), select, SelectRef}</c></item> </taglist> <p>The caller can now make another call to the recv function and now expect data.</p> @@ -70,7 +72,7 @@ <p>This message indicates that the (asynchronous) operation has been aborted. If, for instance, the socket has been closed (by another process), - <c>Info</c> will be <c>{select_ref(), closed}</c>. </p> + <c>Info</c> will be <c>{SelectRef, closed}</c>. </p> </note> <note> <p>There is currently <em>no</em> support for Windows. </p> @@ -112,6 +114,15 @@ <name name="select_info"/> </datatype> <datatype> + <name name="socket_counters"/> + </datatype> + <datatype> + <name name="socket_counter"/> + </datatype> + <datatype> + <name name="socket_info"/> + </datatype> + <datatype> <name name="ip4_address"/> </datatype> <datatype> @@ -329,7 +340,9 @@ <p>In the case when there is no connections waiting, the function will return with the <c>SelectInfo</c>. The caller can then await a select message, <c>{'$socket', Socket, select, Info}</c> (where - <c>Info</c> is the <c>select_ref()</c> from the <c>SelectInfo</c>), + <c>Info</c> is the + <seealso marker="socket#type-select_ref"><c>ref</c></seealso> + field from the <c>SelectInfo</c>), when a client connects (a subsequent call to accept will then return the socket). </p> </desc> @@ -401,7 +414,9 @@ <seealso marker="#type-select_info"><c>SelectInfo</c></seealso>. The caller can then await a select message, <c>{'$socket', Socket, select, Info}</c> (where - <c>Info</c> is the <c>select_ref()</c> from the <c>SelectInfo</c>, + <c>Info</c> is the + <seealso marker="socket#type-select_ref"><c>ref</c></seealso> + field from the <c>SelectInfo</c>, a subsequent call to connect will then establish the connection). </p> </desc> @@ -456,6 +471,20 @@ </func> <func> + <name name="info" arity="1" since="OTP @OTP-15818@"/> + <fsummary>Get miscellaneous socket info.</fsummary> + <desc> + <p>Get miscellaneous info about the socket.</p> + <p>The function returns a map with each info item as a key-value + binding. It reflects the "current" state of the socket. </p> + <note> + <p>In order to ensure data integrity, mutex'es are taken when + needed. So, do not call this function often. </p> + </note> + </desc> + </func> + + <func> <name name="listen" arity="1" since="OTP 22.0"/> <name name="listen" arity="2" since="OTP 22.0"/> <fsummary>Listen for connections on a socket.</fsummary> @@ -528,7 +557,9 @@ <p>In the case when there is no data waiting, the function will return with the <c>SelectInfo</c>. The caller can then await a select message, <c>{'$socket', Socket, select, Info}</c> (where - <c>Info</c> is the <c>select_ref()</c> from the <c>SelectInfo</c>), + <c>Info</c> is the + <seealso marker="socket#type-select_ref"><c>ref</c></seealso> + field from the <c>SelectInfo</c>), when data has arrived (a subsequent call to recv will then return the data). </p> <p>Note that if a length (<c>> 0</c>) is specified, and only part @@ -587,7 +618,9 @@ <p>In the case when there is no data waiting, the function will return with the <c>SelectInfo</c>. The caller can then await a select message, <c>{'$socket', Socket, select, Info}</c> (where - <c>Info</c> is the <c>select_ref()</c> from the <c>SelectInfo</c>), + <c>Info</c> is the + <seealso marker="socket#type-select_ref"><c>ref</c></seealso> + field from the <c>SelectInfo</c>), when data has arrived (a subsequent call to recvfrom will then return the data). </p> </desc> @@ -663,7 +696,9 @@ <p>In the case when there is no data waiting, the function will return with the <c>SelectInfo</c>. The caller can then await a select message, <c>{'$socket', Socket, select, Info}</c> (where - <c>Info</c> is the <c>select_ref()</c> from the <c>SelectInfo</c>), + <c>Info</c> is the + <seealso marker="socket#type-select_ref"><c>ref</c></seealso> + field from the <c>SelectInfo</c>), when data has arrived (a subsequent call to recvmsg will then return the data). </p> </desc> @@ -691,7 +726,9 @@ the function will return with the <c>SelectInfo</c>. The caller can then await a select message, <c>{'$socket', Socket, select, Info}</c> - (where <c>Info</c> is the <c>select_ref()</c> from the + (where <c>Info</c> is the + <seealso marker="socket#type-select_ref"><c>ref</c></seealso> + field from the <c>SelectInfo</c>), when there is room for more data (a subsequent call to send will then send the data). </p> <p>Note that if not all the data was sent, the function will return @@ -749,7 +786,9 @@ the function will return with the <c>SelectInfo</c>. The caller can then await a select message, <c>{'$socket', Socket, select, Info}</c> - (where <c>Info</c> is the <c>select_ref()</c> from the + (where <c>Info</c> is the + <seealso marker="socket#type-select_ref"><c>ref</c></seealso> + field from the <c>SelectInfo</c>), when there is room for more data (a subsequent call to sendmsg will then send the data). </p> </desc> @@ -777,7 +816,9 @@ the function will return with the <c>SelectInfo</c>. The caller can then await a select message, <c>{'$socket', Socket, select, Info}</c> - (where <c>Info</c> is the <c>select_ref()</c> from the + (where <c>Info</c> is the + <seealso marker="socket#type-select_ref"><c>ref</c></seealso> + field from the <c>SelectInfo</c>), when there is room for more data (a subsequent call to sendto will then send the data). </p> </desc> |