90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/* Multi-threaded test for resolver initialization.
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Copyright (C) 2017-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <netdb.h>
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#include <resolv.h>
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#include <stdlib.h>
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#include <support/check.h>
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#include <support/support.h>
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#include <support/xthread.h>
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/* Whether name lookups succeed does not really matter. We use this
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to trigger initialization of the resolver. */
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static const char *test_hostname = "www.gnu.org";
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/* The different initialization methods. */
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enum test_type { init, byname, gai };
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enum { type_count = 3 };
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/* Thread function. Perform a few resolver options. */
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static void *
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thread_func (void *closure)
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{
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enum test_type *ptype = closure;
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/* Perform a few calls to the requested operation. */
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TEST_VERIFY (*ptype >= 0);
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TEST_VERIFY (*ptype < (int) type_count);
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for (int i = 0; i < 3; ++i)
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switch (*ptype)
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{
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case init:
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res_init ();
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break;
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case byname:
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gethostbyname (test_hostname);
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break;
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case gai:
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{
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struct addrinfo hints = { 0, };
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struct addrinfo *ai = NULL;
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if (getaddrinfo (test_hostname, "80", &hints, &ai) == 0)
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freeaddrinfo (ai);
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}
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break;
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}
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free (ptype);
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return NULL;
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}
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static int
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do_test (void)
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{
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/* Start a small number of threads which perform resolver
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operations. */
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enum { thread_count = 30 };
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pthread_t threads[thread_count];
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for (int i = 0; i < thread_count; ++i)
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{
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enum test_type *ptype = xmalloc (sizeof (*ptype));
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*ptype = i % type_count;
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threads[i] = xpthread_create (NULL, thread_func, ptype);
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}
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for (int i = 0; i < type_count; ++i)
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{
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enum test_type *ptype = xmalloc (sizeof (*ptype));
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*ptype = i;
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thread_func (ptype);
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}
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for (int i = 0; i < thread_count; ++i)
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xpthread_join (threads[i]);
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return 0;
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}
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#include <support/test-driver.c>
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