Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/cycles/util/vector.h

@@ -0,0 +1,41 @@
+/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: Apache-2.0 */
+
+#pragma once
+
+#include <cstring>
+#include <vector>
+
+#include "util/guarded_allocator.h"
+
+CCL_NAMESPACE_BEGIN
+
+/* Own subclass-ed version of std::vector. Subclass is needed because:
+ *
+ * - Use own allocator which keeps track of used/peak memory.
+ * - Have method to ensure capacity is re-set to 0.
+ */
+template<typename value_type, typename allocator_type = GuardedAllocator<value_type>>
+class vector : public std::vector<value_type, allocator_type> {
+ public:
+  using BaseClass = std::vector<value_type, allocator_type>;
+
+  /* Inherit all constructors from base class. */
+  using BaseClass::vector;
+
+  /* Try as hard as possible to use zero memory. */
+  void free_memory()
+  {
+    vector<value_type, allocator_type> empty;
+    BaseClass::swap(empty);
+  }
+
+  /* Some external API might demand working with std::vector. */
+  operator std::vector<value_type>()
+  {
+    return std::vector<value_type>(this->begin(), this->end());
+  }
+};
+
+CCL_NAMESPACE_END