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a94d6fe706
Referring to Daniel's article [1], making the init function thread-safe was the last bit to make libcurl thread-safe as a whole. So the name of the feature may as well be the more concise 'threadsafe', also telling the story that libcurl is now fully thread-safe, not just its init function. Chances are high that libcurl wants to remain so in the future, so there is little likelihood of ever needing any other distinct `threadsafe-<name>` feature flags. For consistency we also shorten `CURL_VERSION_THREADSAFE_INIT` to `CURL_VERSION_THREADSAFE`, update its description and reference libcurl's thread safety documentation. [1]: https://daniel.haxx.se/blog/2022/06/08/making-libcurl-init-more-thread-safe/ Reviewed-by: Daniel Stenberg Reviewed-by: Jay Satiro Closes #8989
104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "test.h"
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#include "testutil.h"
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#include "warnless.h"
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#ifdef HAVE_PTHREAD_H
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#include <pthread.h>
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#include <unistd.h>
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#define NUM_THREADS 1000
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static void *run_thread(void *ptr)
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{
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CURLcode *result = ptr;
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*result = curl_global_init(CURL_GLOBAL_ALL);
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if(*result == CURLE_OK)
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curl_global_cleanup();
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return NULL;
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}
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int test(char *URL)
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{
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CURLcode results[NUM_THREADS];
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pthread_t tids[NUM_THREADS];
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unsigned tid_count = NUM_THREADS, i;
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int test_failure = 0;
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curl_version_info_data *ver;
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(void) URL;
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ver = curl_version_info(CURLVERSION_NOW);
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if((ver->features & CURL_VERSION_THREADSAFE) == 0) {
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fprintf(stderr, "%s:%d Have pthread but the "
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"CURL_VERSION_THREADSAFE feature flag is not set\n",
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__FILE__, __LINE__);
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return -1;
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}
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for(i = 0; i < tid_count; i++) {
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int res = pthread_create(&tids[i], NULL, run_thread, &results[i]);
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if(res) {
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fprintf(stderr, "%s:%d Couldn't create thread, errno %d\n",
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__FILE__, __LINE__, res);
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tid_count = i;
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test_failure = -1;
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goto cleanup;
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}
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}
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cleanup:
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for(i = 0; i < tid_count; i++) {
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pthread_join(tids[i], NULL);
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if(results[i] != CURLE_OK) {
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fprintf(stderr, "%s:%d thread[%u]: curl_global_init() failed,"
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"with code %d (%s)\n", __FILE__, __LINE__,
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i, (int) results[i], curl_easy_strerror(results[i]));
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test_failure = -1;
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}
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}
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return test_failure;
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}
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#else /* without pthread, this test doesn't work */
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int test(char *URL)
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{
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curl_version_info_data *ver;
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(void)URL;
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ver = curl_version_info(CURLVERSION_NOW);
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if((ver->features & CURL_VERSION_THREADSAFE) != 0) {
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fprintf(stderr, "%s:%d No pthread but the "
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"CURL_VERSION_THREADSAFE feature flag is set\n",
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__FILE__, __LINE__);
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return -1;
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}
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return 0;
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}
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#endif
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