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lib: add multi_wakeup_internal

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For threaded resolving, added an additional socket/eventfd pair to the
multi handle for notifications from threads. The original "double use"
of the standard wakeup pair did lead to regressions for apps.

The API definition of curl_multi_poll/wait/wakeup is pretty tight
regarding what effects what and adding notifications on top of that
broke what apps perceived to be the contract.

Fixes #22272
Reported-by: Sergei Zimmerman
Closes #22274
This commit is contained in:
Stefan Eissing 2026-07-08 10:34:51 +02:00 • committed by Daniel Stenberg
parent bd58857201
commit 009fd378e8
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GPG key ID: 5CC908FDB71E12C2
8 changed files with 136 additions and 12 deletions
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2
tests/libtest/Makefile.inc
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@ -119,7 +119,7 @@ TESTS_C = \
lib2023.c lib2032.c lib2082.c \
lib2301.c lib2302.c lib2304.c lib2306.c lib2308.c lib2309.c \
lib2402.c lib2404.c lib2405.c \
lib2412.c \
lib2412.c lib2414.c \
lib2502.c lib2504.c lib2505.c lib2506.c \
lib2700.c \
lib3010.c lib3025.c lib3026.c lib3027.c lib3033.c lib3034.c \

53
tests/libtest/lib2414.c Normal file
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@ -0,0 +1,53 @@
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Dmitry Karpov <dkarpov1970@gmail.com>
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#include "first.h"
#include "testtrace.h"
static CURLcode test_lib2414(const char *URL)
{
CURLM *multi = NULL;
CURLcode result = CURLE_OK;
int running;
(void)URL;
global_init(CURL_GLOBAL_ALL);
multi = curl_multi_init();
if(!multi) {
curl_mfprintf(stderr, "curl_multi_init() failed\n");
result = TEST_ERR_MAJOR_BAD;
goto test_cleanup;
}
curl_multi_wakeup(multi);
curl_multi_perform(multi, &running);
curl_multi_poll(multi, NULL, 0, INT_MAX, NULL);
test_cleanup:
if(multi)
curl_multi_cleanup(multi);
curl_global_cleanup();
return result;
}