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libcurl-thread.3: also mention threaded-resolver

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Reported-by: Alex Bligh
Bug: https://curl.haxx.se/mail/lib-2017-04/0044.html
This commit is contained in:
Daniel Stenberg 2017-04-09 23:09:50 +02:00
parent ced57e9a95
commit 1b9b90d94a
1 changed files with 5 additions and 4 deletions
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9
docs/libcurl/libcurl-thread.3
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@ -5,7 +5,7 @@
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 2015 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
.\" * Copyright (C) 2015 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
@ -77,9 +77,10 @@ without using either the c-ares or threaded resolver backends. When using
multiple threads you should set the \fICURLOPT_NOSIGNAL(3)\fP option to 1L for
all handles. Everything will or might work fine except that timeouts are not
honored during the DNS lookup - which you can work around by building libcurl
with c-ares support. c-ares is a library that provides asynchronous name
resolves. On some platforms, libcurl simply will not function properly
multi-threaded unless this option is set.
with c-ares or threaded-resolver support. c-ares is a library that provides
asynchronous name resolves. On some platforms, libcurl simply will not
function properly multi-threaded unless the \fICURLOPT_NOSIGNAL(3)\f option is
set.
.IP "Name resolving"
\fBgethostby* functions and other system calls.\fP These functions, provided
by your operating system, must be thread safe. It is very important that