Add Chromium-only Blender WebEngine parity work

blender-5.2.0/source/blender/blenlib/BLI_gsqueue.h

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+/* SPDX-FileCopyrightText: 2001-2002 NaN Holding BV. All rights reserved.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+#pragma once
+
+/** \file
+ * \ingroup bli
+ */
+
+#include "BLI_utildefines.h"
+
+namespace blender {
+
+struct GSQueue;
+
+GSQueue *BLI_gsqueue_new(size_t elem_size);
+/**
+ * Returns true if the queue is empty, false otherwise.
+ */
+bool BLI_gsqueue_is_empty(const GSQueue *queue);
+size_t BLI_gsqueue_len(const GSQueue *queue);
+/**
+ * Retrieves and removes the first element from the queue.
+ * The value is copies to \a r_item, which must be at least \a elem_size bytes.
+ *
+ * Does not reduce amount of allocated memory.
+ */
+void BLI_gsqueue_pop(GSQueue *queue, void *r_item);
+/**
+ * Copies the source value onto the end of the queue
+ *
+ * \note This copies #GSQueue.elem_size bytes from \a item,
+ * (the pointer itself is not stored).
+ *
+ * \param item: source data to be copied to the queue.
+ */
+void BLI_gsqueue_push(GSQueue *queue, const void *item);
+/**
+ * Free the queue's data and the queue itself.
+ */
+void BLI_gsqueue_free(GSQueue *queue);
+
+}  // namespace blender