mirror of
https://github.com/curl/curl.git
synced 2026-04-15 02:01:40 +03:00
82009c4220
Replace the `volatile int dirty` with a reference counter protected by a mutex when available. Solve the problem of when to call application's lock function by adding a volatile flag that indicates a share has been added to easy handles in its lifetime. That flag ever goes from FALSE to TRUE, so volatile might work (in the absence of a mutex). (The problem is that the lock/unlock functions need 2-3 `curl_share_setopt()` invocations to become usable and there is no way of telling if the third will ever happen. Calling the lock function before the 3rd setopt may crash the application.) When removing a share from an easy handle (or replacing it with another share), detach the easy connection on a share with a connection pool. When cleaning up a share, allow this even if it is still used in easy handles. It will be destroyed when the reference count drops to 0. Closes #20870
134 lines
3.1 KiB
C
134 lines
3.1 KiB
C
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
*
|
|
* 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 "curl_setup.h"
|
|
#include "curl_threads.h"
|
|
|
|
#ifdef USE_THREADS
|
|
|
|
#ifdef HAVE_THREADS_POSIX
|
|
|
|
struct Curl_actual_call {
|
|
unsigned int (*func)(void *);
|
|
void *arg;
|
|
};
|
|
|
|
static void *curl_thread_create_thunk(void *arg)
|
|
{
|
|
struct Curl_actual_call *ac = arg;
|
|
unsigned int (*func)(void *) = ac->func;
|
|
void *real_arg = ac->arg;
|
|
|
|
curlx_free(ac);
|
|
|
|
(*func)(real_arg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
curl_thread_t Curl_thread_create(CURL_THREAD_RETURN_T
|
|
(CURL_STDCALL *func) (void *), void *arg)
|
|
{
|
|
curl_thread_t t = curlx_malloc(sizeof(pthread_t));
|
|
struct Curl_actual_call *ac = NULL;
|
|
int rc;
|
|
|
|
if(t)
|
|
ac = curlx_malloc(sizeof(struct Curl_actual_call));
|
|
if(!(ac && t))
|
|
goto err;
|
|
|
|
ac->func = func;
|
|
ac->arg = arg;
|
|
|
|
rc = pthread_create(t, NULL, curl_thread_create_thunk, ac);
|
|
if(rc) {
|
|
errno = rc;
|
|
goto err;
|
|
}
|
|
|
|
return t;
|
|
|
|
err:
|
|
curlx_free(t);
|
|
curlx_free(ac);
|
|
return curl_thread_t_null;
|
|
}
|
|
|
|
void Curl_thread_destroy(curl_thread_t *hnd)
|
|
{
|
|
if(*hnd != curl_thread_t_null) {
|
|
pthread_detach(**hnd);
|
|
curlx_free(*hnd);
|
|
*hnd = curl_thread_t_null;
|
|
}
|
|
}
|
|
|
|
int Curl_thread_join(curl_thread_t *hnd)
|
|
{
|
|
int ret = (pthread_join(**hnd, NULL) == 0);
|
|
|
|
curlx_free(*hnd);
|
|
*hnd = curl_thread_t_null;
|
|
|
|
return ret;
|
|
}
|
|
|
|
#elif defined(_WIN32)
|
|
|
|
curl_thread_t Curl_thread_create(CURL_THREAD_RETURN_T
|
|
(CURL_STDCALL *func) (void *), void *arg)
|
|
{
|
|
curl_thread_t t = CreateThread(NULL, 0, func, arg, 0, NULL);
|
|
if(!t) {
|
|
DWORD gle = GetLastError();
|
|
/* !checksrc! disable ERRNOVAR 1 */
|
|
errno = (gle == ERROR_ACCESS_DENIED ||
|
|
gle == ERROR_NOT_ENOUGH_MEMORY) ?
|
|
EACCES : EINVAL;
|
|
return curl_thread_t_null;
|
|
}
|
|
return t;
|
|
}
|
|
|
|
void Curl_thread_destroy(curl_thread_t *hnd)
|
|
{
|
|
if(*hnd != curl_thread_t_null) {
|
|
CloseHandle(*hnd);
|
|
*hnd = curl_thread_t_null;
|
|
}
|
|
}
|
|
|
|
int Curl_thread_join(curl_thread_t *hnd)
|
|
{
|
|
int ret = (WaitForSingleObjectEx(*hnd, INFINITE, FALSE) == WAIT_OBJECT_0);
|
|
|
|
Curl_thread_destroy(hnd);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#else
|
|
#error neither HAVE_THREADS_POSIX nor _WIN32 defined
|
|
#endif
|
|
#endif /* USE_THREADS */
|