--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/curl/lib/curl_threads.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,64 @@
+#ifndef HEADER_CURL_THREADS_H
+#define HEADER_CURL_THREADS_H
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  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"
+
+#if defined(USE_THREADS_POSIX)
+#  define CURL_STDCALL
+#  define curl_mutex_t           pthread_mutex_t
+#  define curl_thread_t          pthread_t *
+#  define curl_thread_t_null     (pthread_t *)0
+#  define Curl_mutex_init(m)     pthread_mutex_init(m, NULL)
+#  define Curl_mutex_acquire(m)  pthread_mutex_lock(m)
+#  define Curl_mutex_release(m)  pthread_mutex_unlock(m)
+#  define Curl_mutex_destroy(m)  pthread_mutex_destroy(m)
+#elif defined(USE_THREADS_WIN32)
+#  define CURL_STDCALL           __stdcall
+#  define curl_mutex_t           CRITICAL_SECTION
+#  define curl_thread_t          HANDLE
+#  define curl_thread_t_null     (HANDLE)0
+#  if !defined(_WIN32_WINNT) || !defined(_WIN32_WINNT_VISTA) || \
+      (_WIN32_WINNT < _WIN32_WINNT_VISTA) || \
+      (defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR))
+#    define Curl_mutex_init(m)   InitializeCriticalSection(m)
+#  else
+#    define Curl_mutex_init(m)   InitializeCriticalSectionEx(m, 0, 1)
+#  endif
+#  define Curl_mutex_acquire(m)  EnterCriticalSection(m)
+#  define Curl_mutex_release(m)  LeaveCriticalSection(m)
+#  define Curl_mutex_destroy(m)  DeleteCriticalSection(m)
+#endif
+
+#if defined(USE_THREADS_POSIX) || defined(USE_THREADS_WIN32)
+
+/* !checksrc! disable SPACEBEFOREPAREN 1 */
+curl_thread_t Curl_thread_create(unsigned int (CURL_STDCALL *func) (void *),
+                                 void *arg);
+
+void Curl_thread_destroy(curl_thread_t hnd);
+
+int Curl_thread_join(curl_thread_t *hnd);
+
+#endif /* USE_THREADS_POSIX || USE_THREADS_WIN32 */
+
+#endif /* HEADER_CURL_THREADS_H */