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Use WL_SOCKET_CLOSED for client_connection_check_interval.

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Previously we used poll() directly to check for a POLLRDHUP event.
Instead, use the WaitEventSet API to poll the socket for
WL_SOCKET_CLOSED, which knows how to detect this condition on many more
operating systems.

Reviewed-by: Zhihong Yu <zyu@yugabyte.com>
Reviewed-by: Maksim Milyutin <milyutinma@gmail.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/77def86b27e41f0efcba411460e929ae%40postgrespro.ru
This commit is contained in:
Thomas Munro
2022-02-14 16:29:44 +13:00
parent 50e570a59e
commit cba5b994c9
4 changed files with 29 additions and 31 deletions
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6
doc/src/sgml/config.sgml
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@ -1012,9 +1012,9 @@ include_dir 'conf.d'
the kernel reports that the connection is closed.
</para>
<para>
This option is currently available only on systems that support the
non-standard <symbol>POLLRDHUP</symbol> extension to the
<symbol>poll</symbol> system call, including Linux.
This option relies on kernel events exposed by Linux, macOS, illumos
and the BSD family of operating systems, and is not currently available
on other systems.
</para>
<para>
If the value is specified without units, it is taken as milliseconds.