Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/cycles/util/thread.cpp

@@ -0,0 +1,64 @@
+/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: Apache-2.0 */
+
+#include "util/thread.h"
+
+#if defined(__APPLE__) || defined(__linux__) && !defined(__GLIBC__)
+#else
+#  include "util/system.h"
+#  ifdef _WIN32
+#    include "util/windows.h"
+#  endif
+
+#  include <system_error>
+#endif
+
+CCL_NAMESPACE_BEGIN
+
+thread::thread(std::function<void()> run_cb) : run_cb_(run_cb), joined_(false)
+{
+#if defined(__APPLE__) || defined(__linux__) && !defined(__GLIBC__)
+  /* Set the stack size to 2MB to match GLIBC. The default 512KB on macOS is
+   * too small for Embree, and consistent stack size also makes things more
+   * predictable in general. */
+  pthread_attr_t attribute;
+  pthread_attr_init(&attribute);
+  pthread_attr_setstacksize(&attribute, 1024 * 1024 * 2);
+  pthread_create(&pthread_id, &attribute, run, (void *)this);
+#else
+  std_thread = std::thread(&thread::run, this);
+#endif
+}
+
+thread::~thread()
+{
+  if (!joined_) {
+    join();
+  }
+}
+
+void *thread::run(void *arg)
+{
+  thread *self = (thread *)(arg);
+  self->run_cb_();
+  return nullptr;
+}
+
+bool thread::join()
+{
+  joined_ = true;
+#if defined(__APPLE__) || defined(__linux__) && !defined(__GLIBC__)
+  return pthread_join(pthread_id, nullptr) == 0;
+#else
+  try {
+    std_thread.join();
+    return true;
+  }
+  catch (const std::system_error &) {
+    return false;
+  }
+#endif
+}
+
+CCL_NAMESPACE_END