Update networking layer w/ CURL and emscripten impl

2025-11-08 01:50:36 +11:00
parent a17925904d
commit f6874dc55a
4105 changed files with 694617 additions and 179 deletions
@@ -0,0 +1,105 @@
+#ifndef HEADER_CURL_EASY_LOCK_H
+#define HEADER_CURL_EASY_LOCK_H
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  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"
+
+#define GLOBAL_INIT_IS_THREADSAFE
+
+#if defined(_WIN32_WINNT) && _WIN32_WINNT >= 0x600
+
+#define curl_simple_lock SRWLOCK
+#define CURL_SIMPLE_LOCK_INIT SRWLOCK_INIT
+
+#define curl_simple_lock_lock(m) AcquireSRWLockExclusive(m)
+#define curl_simple_lock_unlock(m) ReleaseSRWLockExclusive(m)
+
+#elif defined(HAVE_ATOMIC) && defined(HAVE_STDATOMIC_H)
+#include <stdatomic.h>
+#ifdef HAVE_SCHED_YIELD
+#include <sched.h>
+#endif
+
+#define curl_simple_lock atomic_int
+#define CURL_SIMPLE_LOCK_INIT 0
+
+#ifndef __INTEL_COMPILER
+/* The Intel compiler tries to look like GCC *and* clang *and* lies in its
+   __has_builtin() function, so override it. */
+
+/* if GCC on i386/x86_64 or if the built-in is present */
+#if (defined(__GNUC__) && !defined(__clang__)) &&     \
+    (defined(__i386__) || defined(__x86_64__))
+#define HAVE_BUILTIN_IA32_PAUSE
+#elif defined(__has_builtin)  /* Keep this PP check separate from others */
+#if __has_builtin(__builtin_ia32_pause)
+#define HAVE_BUILTIN_IA32_PAUSE
+#endif
+#endif
+
+#endif
+
+static CURL_INLINE void curl_simple_lock_lock(curl_simple_lock *lock)
+{
+  for(;;) {
+    if(!atomic_exchange_explicit(lock, true, memory_order_acquire))
+      break;
+    /* Reduce cache coherency traffic */
+    while(atomic_load_explicit(lock, memory_order_relaxed)) {
+      /* Reduce load (not mandatory) */
+#ifdef HAVE_BUILTIN_IA32_PAUSE
+      __builtin_ia32_pause();
+#elif defined(__aarch64__)
+      __asm__ volatile("yield" ::: "memory");
+#elif defined(_WIN32)
+      Sleep(1);
+#elif defined(HAVE_SCHED_YIELD)
+      sched_yield();
+#endif
+    }
+  }
+}
+
+static CURL_INLINE void curl_simple_lock_unlock(curl_simple_lock *lock)
+{
+  atomic_store_explicit(lock, false, memory_order_release);
+}
+
+#elif defined(USE_THREADS_POSIX) && defined(HAVE_PTHREAD_H)
+
+#include <pthread.h>
+
+#define curl_simple_lock pthread_mutex_t
+#define CURL_SIMPLE_LOCK_INIT PTHREAD_MUTEX_INITIALIZER
+#define curl_simple_lock_lock(m) pthread_mutex_lock(m)
+#define curl_simple_lock_unlock(m) pthread_mutex_unlock(m)
+
+#else
+
+#undef  GLOBAL_INIT_IS_THREADSAFE
+
+#endif
+
+#endif /* HEADER_CURL_EASY_LOCK_H */