--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/curl/lib/curl_threads.c	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,155 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2016, 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.haxx.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.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#include <curl/curl.h>
+
+#if defined(USE_THREADS_POSIX)
+#  ifdef HAVE_PTHREAD_H
+#    include <pthread.h>
+#  endif
+#elif defined(USE_THREADS_WIN32)
+#  ifdef HAVE_PROCESS_H
+#    include <process.h>
+#  endif
+#endif
+
+#include "curl_threads.h"
+#include "curl_memory.h"
+/* The last #include file should be: */
+#include "memdebug.h"
+
+#if defined(USE_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;
+
+  free(ac);
+
+  (*func)(real_arg);
+
+  return 0;
+}
+
+curl_thread_t Curl_thread_create(unsigned int (*func) (void *), void *arg)
+{
+  curl_thread_t t = malloc(sizeof(pthread_t));
+  struct curl_actual_call *ac = malloc(sizeof(struct curl_actual_call));
+  if(!(ac && t))
+    goto err;
+
+  ac->func = func;
+  ac->arg = arg;
+
+  if(pthread_create(t, NULL, curl_thread_create_thunk, ac) != 0)
+    goto err;
+
+  return t;
+
+err:
+  free(t);
+  free(ac);
+  return curl_thread_t_null;
+}
+
+void Curl_thread_destroy(curl_thread_t hnd)
+{
+  if(hnd != curl_thread_t_null) {
+    pthread_detach(*hnd);
+    free(hnd);
+  }
+}
+
+int Curl_thread_join(curl_thread_t *hnd)
+{
+  int ret = (pthread_join(**hnd, NULL) == 0);
+
+  free(*hnd);
+  *hnd = curl_thread_t_null;
+
+  return ret;
+}
+
+#elif defined(USE_THREADS_WIN32)
+
+/* !checksrc! disable SPACEBEFOREPAREN 1 */
+curl_thread_t Curl_thread_create(unsigned int (CURL_STDCALL *func) (void *),
+                                 void *arg)
+{
+#ifdef _WIN32_WCE
+  typedef HANDLE curl_win_thread_handle_t;
+#elif defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR)
+  typedef unsigned long curl_win_thread_handle_t;
+#else
+  typedef uintptr_t curl_win_thread_handle_t;
+#endif
+  curl_thread_t t;
+  curl_win_thread_handle_t thread_handle;
+#ifdef _WIN32_WCE
+  thread_handle = CreateThread(NULL, 0, func, arg, 0, NULL);
+#else
+  thread_handle = _beginthreadex(NULL, 0, func, arg, 0, NULL);
+#endif
+  t = (curl_thread_t)thread_handle;
+  if((t == 0) || (t == LongToHandle(-1L))) {
+#ifdef _WIN32_WCE
+    DWORD gle = GetLastError();
+    errno = ((gle == ERROR_ACCESS_DENIED ||
+              gle == ERROR_NOT_ENOUGH_MEMORY) ?
+             EACCES : EINVAL);
+#endif
+    return curl_thread_t_null;
+  }
+  return t;
+}
+
+void Curl_thread_destroy(curl_thread_t hnd)
+{
+  CloseHandle(hnd);
+}
+
+int Curl_thread_join(curl_thread_t *hnd)
+{
+#if !defined(_WIN32_WINNT) || !defined(_WIN32_WINNT_VISTA) || \
+    (_WIN32_WINNT < _WIN32_WINNT_VISTA)
+  int ret = (WaitForSingleObject(*hnd, INFINITE) == WAIT_OBJECT_0);
+#else
+  int ret = (WaitForSingleObjectEx(*hnd, INFINITE, FALSE) == WAIT_OBJECT_0);
+#endif
+
+  Curl_thread_destroy(*hnd);
+
+  *hnd = curl_thread_t_null;
+
+  return ret;
+}
+
+#endif /* USE_THREADS_* */