Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/curl/docs/libcurl/curl_share_setopt.3 @ 17:dd9cdb856310

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Remove PKG-INFO from the because it is regenerated automatically for the sdist
author Franz Glasner <fzglas.hg@dom66.de>
date Thu, 18 Sep 2025 17:40:40 +0200
parents b50eed0cc0ef
children
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1 .\" **************************************************************************
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2 .\" * _ _ ____ _
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3 .\" * Project ___| | | | _ \| |
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4 .\" * / __| | | | |_) | |
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5 .\" * | (__| |_| | _ <| |___
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6 .\" * \___|\___/|_| \_\_____|
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7 .\" *
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8 .\" * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
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9 .\" *
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10 .\" * This software is licensed as described in the file COPYING, which
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11 .\" * you should have received as part of this distribution. The terms
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12 .\" * are also available at https://curl.haxx.se/docs/copyright.html.
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13 .\" *
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14 .\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 .\" * copies of the Software, and permit persons to whom the Software is
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16 .\" * furnished to do so, under the terms of the COPYING file.
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17 .\" *
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18 .\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 .\" * KIND, either express or implied.
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20 .\" *
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21 .\" **************************************************************************
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22 .TH curl_share_setopt 3 "8 Aug 2003" "libcurl 7.10.7" "libcurl Manual"
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23 .SH NAME
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24 curl_share_setopt - Set options for a shared object
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25 .SH SYNOPSIS
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26 .B #include <curl/curl.h>
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27 .sp
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28 CURLSHcode curl_share_setopt(CURLSH *share, CURLSHoption option, parameter);
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29 .ad
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30 .SH DESCRIPTION
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31 Set the \fIoption\fP to \fIparameter\fP for the given \fIshare\fP.
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32 .SH OPTIONS
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33 .IP CURLSHOPT_LOCKFUNC
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34 The \fIparameter\fP must be a pointer to a function matching the following
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35 prototype:
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36
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37 void lock_function(CURL *handle, curl_lock_data data, curl_lock_access access,
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38 void *userptr);
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39
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40 The \fIdata\fP argument tells what kind of data libcurl wants to lock. Make
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41 sure that the callback uses a different lock for each kind of data.
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42
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43 \fIaccess\fP defines what access type libcurl wants, shared or single.
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45 \fIuserptr\fP is the pointer you set with \fICURLSHOPT_USERDATA\fP.
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46 .IP CURLSHOPT_UNLOCKFUNC
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47 The \fIparameter\fP must be a pointer to a function matching the following
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48 prototype:
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49
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50 void unlock_function(CURL *handle, curl_lock_data data, void *userptr);
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51
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52 \fIdata\fP defines what data libcurl wants to unlock, and you must make sure
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53 that only one lock is given at any time for each kind of data.
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54
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55 \fIuserptr\fP is the pointer you set with \fICURLSHOPT_USERDATA\fP.
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56 .IP CURLSHOPT_SHARE
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57 The \fIparameter\fP specifies a type of data that should be shared. This may
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58 be set to one of the values described below.
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59 .RS
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60 .IP CURL_LOCK_DATA_COOKIE
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61 Cookie data will be shared across the easy handles using this shared object.
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62 .IP CURL_LOCK_DATA_DNS
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63 Cached DNS hosts will be shared across the easy handles using this shared
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64 object. Note that when you use the multi interface, all easy handles added to
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65 the same multi handle will share DNS cache by default without using this
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66 option.
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67 .IP CURL_LOCK_DATA_SSL_SESSION
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68 SSL session IDs will be shared across the easy handles using this shared
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69 object. This will reduce the time spent in the SSL handshake when reconnecting
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70 to the same server. Note SSL session IDs are reused within the same easy handle
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71 by default. Note this symbol was added in 7.10.3 but was not implemented until
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72 7.23.0.
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73 .IP CURL_LOCK_DATA_CONNECT
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74 Put the connection cache in the share object and make all easy handles using
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75 this share object share the connection cache. Using this, you can for example
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76 do multi-threaded libcurl use with one handle in each thread, and yet have a
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77 shared pool of unused connections and this way get way better connection
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78 re-use than if you use one separate pool in each thread.
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79
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80 Connections that are used for HTTP/1.1 Pipelining or HTTP/2 multiplexing only
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81 get additional transfers added to them if the existing connection is held by
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82 the same multi or easy handle. libcurl does not support doing HTTP/2 streams
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83 in different threads using a shared connection.
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84
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85 Support for \fBCURL_LOCK_DATA_CONNECT\fP was added in 7.57.0, but the symbol
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86 existed before this.
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87
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88 Note that when you use the multi interface, all easy handles added to the same
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89 multi handle will share connection cache by default without using this option.
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90 .IP CURL_LOCK_DATA_PSL
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91 The Public Suffix List stored in the share object is made available to all
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92 easy handle bound to the later. Since the Public Suffix List is periodically
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93 refreshed, this avoids updates in too many different contexts.
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94
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95 \fBCURL_LOCK_DATA_PSL\fP exists since 7.61.0.
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96
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97 Note that when you use the multi interface, all easy handles added to the same
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98 multi handle will share PSL cache by default without using this option.
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99 .RE
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100 .IP CURLSHOPT_UNSHARE
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101 This option does the opposite of \fICURLSHOPT_SHARE\fP. It specifies that
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102 the specified \fIparameter\fP will no longer be shared. Valid values are
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103 the same as those for \fICURLSHOPT_SHARE\fP.
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104 .IP CURLSHOPT_USERDATA
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105 The \fIparameter\fP allows you to specify a pointer to data that will be passed
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106 to the lock_function and unlock_function each time it is called.
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107 .SH RETURN VALUE
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108 CURLSHE_OK (zero) means that the option was set properly, non-zero means an
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109 error occurred as \fI<curl/curl.h>\fP defines. See the \fIlibcurl-errors.3\fP
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110 man page for the full list with descriptions.
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111 .SH "SEE ALSO"
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112 .BR curl_share_cleanup "(3), " curl_share_init "(3)"