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curl-curl/docs/libcurl
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Stefan Eissing 88fc6c491f
threaded-resolver: fix shutdown 
Changed strategy to start up and terminate resolver thread.

When starting up:

Start the thread with mutex acquired, wait for signal from thread that
it started and has incremented the ref counter. Thread set
pthread_cancel() to disabled before that and only enables cancelling
during resolving itself. This assure that the ref counter is correct and
the unlinking of the resolve context always happens.

When shutting down resolving:

If ref counting shows thread has finished, join it, free everything. If
thread has not finished, try pthread_cancel() (non Windows), but keep
the thread handle around.

When destroying resolving:

Shutdown first, then, if the thread is still there and 'quick_exit' is
not set, join it and free everything. This might occur a delay if
getaddrinfo() hangs and cannot be interrupted by pthread_cancel().

Destroying resolving happens when another resolve is started on an
easy handle or when the easy handle is closed.

Add test795 to check that connect timeout triggers correctly
when resolving is delayed. Add debug env var `CURL_DNS_DELAY_MS`
to simulate delays in resolving.

Fix test1557 to set `quick_exit` and use `xxx.invalid` as domain
instead of `nothing` that was leading to hangers in CI.

Closes #18263
2025-08-21 09:26:49 +02:00
..
opts openssl: auto-pause on verify callback retry 2025-08-15 13:50:28 +02:00
.gitignore gitignore: the generated libcurl-symbols.md 2024-01-25 16:34:06 +01:00
ABI.md docs: use present tense 2024-02-27 09:47:21 +01:00
CMakeLists.txt tests: always make bundles, adapt build and tests 2025-06-14 21:08:23 +02:00
curl_easy_cleanup.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_easy_duphandle.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_easy_escape.md curl_easy_escape.md: move historic details to HISTORY 2024-07-23 11:24:19 +02:00
curl_easy_getinfo.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_easy_header.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_easy_init.md docs: use lowercase curl and libcurl 2025-01-02 17:15:54 +01:00
curl_easy_nextheader.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_easy_option_by_id.md docs: minor edits to please the new spellchecker regime 2025-02-27 13:15:21 +01:00
curl_easy_option_by_name.md docs: minor edits to please the new spellchecker regime 2025-02-27 13:15:21 +01:00
curl_easy_option_next.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_easy_pause.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_easy_perform.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_easy_recv.md docs/libcurl: fix type and prototype problems in examples 2025-04-29 22:44:05 +02:00
curl_easy_reset.md docs: use lowercase curl and libcurl 2025-01-02 17:15:54 +01:00
curl_easy_send.md docs/libcurl: fix type and prototype problems in examples 2025-04-29 22:44:05 +02:00
curl_easy_setopt.md docs: mention the as-is concept generically 2025-07-09 15:32:46 +02:00
curl_easy_ssls_export.md curl_easy_ssls_export: make the example more clear 2025-08-01 10:49:56 +02:00
curl_easy_ssls_import.md docs: fix name in curl_easy_ssls_export man page 2025-07-23 00:56:11 +02:00
curl_easy_strerror.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_easy_unescape.md GHA: silence proselint warnings and an error 2024-10-15 16:44:17 +02:00
curl_easy_upkeep.md mqtt: send ping at upkeep interval 2025-04-16 09:36:19 +02:00
curl_escape.md GHA: silence proselint warnings and an error 2024-10-15 16:44:17 +02:00
curl_formadd.md spelling: call it null-terminate consistently 2025-05-30 17:29:45 +02:00
curl_formfree.md GHA: silence proselint warnings and an error 2024-10-15 16:44:17 +02:00
curl_formget.md docs: minor edits to please the new spellchecker regime 2025-02-27 13:15:21 +01:00
curl_free.md GHA: silence proselint warnings and an error 2024-10-15 16:44:17 +02:00
curl_getdate.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_getenv.md GHA: silence proselint warnings and an error 2024-10-15 16:44:17 +02:00
curl_global_cleanup.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_global_init_mem.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_global_init.md tidy-up: OS names 2024-08-04 19:17:45 +02:00
curl_global_sslset.md TLS: remove support for Secure Transport and BearSSL 2025-06-11 07:54:19 +02:00
curl_global_trace.md VERSIONS: list all past releases 2025-04-03 08:26:33 +02:00
curl_mime_addpart.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_mime_data_cb.md curl_mime_data_cb.md: mention what datasize is for 2025-07-31 10:48:53 +02:00
curl_mime_data.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_mime_encoder.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_mime_filedata.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_mime_filename.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_mime_free.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_mime_headers.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_mime_init.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_mime_name.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_mime_subparts.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_mime_type.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_mprintf.md spacecheck.pl: drop more exceptions 2025-05-13 16:01:07 +02:00
curl_multi_add_handle.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_multi_assign.md docs/libcurl: make examples build with picky compiler options 2025-04-11 15:23:51 +02:00
curl_multi_cleanup.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_multi_fdset.md docs: add FD_ZERO to curl_multi_fdset example 2025-02-14 08:21:42 +01:00
curl_multi_get_handles.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_multi_get_offt.md curl_multi_get_offt: language fix 2025-08-05 11:48:31 +02:00
curl_multi_info_read.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_multi_init.md docs/libcurl: expand multi documentation 2024-10-01 15:17:17 +02:00
curl_multi_perform.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_multi_poll.md docs/libcurl: make examples build with picky compiler options 2025-04-11 15:23:51 +02:00
curl_multi_remove_handle.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_multi_setopt.md multi: add CURLMOPT_NETWORK_CHANGED to signal network changed 2025-07-29 11:18:26 +02:00
curl_multi_socket_action.md docs/libcurl: make examples build with picky compiler options 2025-04-11 15:23:51 +02:00
curl_multi_socket_all.md docs/libcurl: make examples build with picky compiler options 2025-04-11 15:23:51 +02:00
curl_multi_socket.md docs/libcurl: make examples build with picky compiler options 2025-04-11 15:23:51 +02:00
curl_multi_strerror.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_multi_timeout.md docs/libcurl: make examples build with picky compiler options 2025-04-11 15:23:51 +02:00
curl_multi_wait.md docs/libcurl: make examples build with picky compiler options 2025-04-11 15:23:51 +02:00
curl_multi_waitfds.md curl_multi_waitfds.md: tidy up the example 2025-01-19 11:45:25 +01:00
curl_multi_wakeup.md docs/libcurl: make examples build with picky compiler options 2025-04-11 15:23:51 +02:00
curl_pushheader_byname.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_pushheader_bynum.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_share_cleanup.md docs/libcurl: add to cleanup docs that their inputs go invalid 2024-07-23 11:18:46 +02:00
curl_share_init.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_share_setopt.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_share_strerror.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_slist_append.md docs/libcurl: make examples build with picky compiler options 2025-04-11 15:23:51 +02:00
curl_slist_free_all.md docs/libcurl: make examples build with picky compiler options 2025-04-11 15:23:51 +02:00
curl_strequal.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_strnequal.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_unescape.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_url_cleanup.md GHA: silence proselint warnings and an error 2024-10-15 16:44:17 +02:00
curl_url_dup.md docs/libcurl: return value overhall 2025-01-02 16:58:05 +01:00
curl_url_get.md spelling: call it null-terminate consistently 2025-05-30 17:29:45 +02:00
curl_url_set.md urlapi: allow more path characters "raw" when asked to URL encode 2025-08-01 23:22:32 +02:00
curl_url_strerror.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_url.md curldown: fixups 2024-07-19 17:03:25 +02:00
curl_version_info.md curl_version_info.md: clarify ssl_version for MultiSSL 2025-05-11 12:23:36 -04:00
curl_version.md curl_version_info.md: clarify ssl_version for MultiSSL 2025-05-11 12:23:36 -04:00
curl_ws_meta.md docs/libcurl: fix type and prototype problems in examples 2025-04-29 22:44:05 +02:00
curl_ws_recv.md curl_ws_recv.md: expand a little on the fragments the API delivers 2025-03-14 13:36:02 +01:00
curl_ws_send.md websocket: support CURLOPT_READFUNCTION 2025-08-11 23:28:54 +02:00
curl_ws_start_frame.md websocket: support CURLOPT_READFUNCTION 2025-08-11 23:28:54 +02:00
libcurl-easy.md curldown: make 'added-in:' a mandatory header field 2024-07-18 18:04:09 +02:00
libcurl-env-dbg.md threaded-resolver: fix shutdown 2025-08-21 09:26:49 +02:00
libcurl-env.md netrc: use the NETRC environment variable (first) if set 2025-07-27 18:26:43 +02:00
libcurl-errors.md test1175: fix to run, and fix documentation issues detected 2025-07-11 12:28:46 +02:00
libcurl-multi.md curldown: make 'added-in:' a mandatory header field 2024-07-18 18:04:09 +02:00
libcurl-security.md GHA: silence proselint warnings and an error 2024-10-15 16:44:17 +02:00
libcurl-share.md GHA: silence proselint warnings and an error 2024-10-15 16:44:17 +02:00
libcurl-thread.md tidy-up: URL updates 2024-07-30 21:27:12 +02:00
libcurl-tutorial.md libcurl-tutorial.md: fix read callback explanation 2025-04-23 23:23:59 +02:00
libcurl-url.md GHA: silence proselint warnings and an error 2024-10-15 16:44:17 +02:00
libcurl-ws.md websocket: support CURLOPT_READFUNCTION 2025-08-11 23:28:54 +02:00
libcurl.m4 GHA/checksrc: expand spellcheck, fix issues found 2025-07-21 16:09:01 +02:00
libcurl.md GHA: silence proselint warnings and an error 2024-10-15 16:44:17 +02:00
Makefile.am tests: always make bundles, adapt build and tests 2025-06-14 21:08:23 +02:00
Makefile.inc websocket: support CURLOPT_READFUNCTION 2025-08-11 23:28:54 +02:00
mksymbolsmanpage.pl scripts: enable strict warnings in Perl where missing, fix fallouts 2025-07-27 22:35:18 +02:00
symbols-in-versions multi: change prefix for the network change bits to CURLMNWC_ 2025-08-05 13:05:59 +02:00
symbols.pl scripts: enable strict warnings in Perl where missing, fix fallouts 2025-07-27 22:35:18 +02:00