util: Add helpers for iterating over Vulkan extension structs

Reviewed-by: Dave Airlie <[email protected]>

1 files changed, 43 insertions, 0 deletions

diff --git a/src/util/vk_util.h b/src/util/vk_util.h
new file mode 100644
index 00000000000..e0b5d0b22c0
--- /dev/null
+++ b/src/util/vk_util.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright © 2017 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+#ifndef VK_UTIL_H
+#define VK_UTIL_H
+
+/* common inlines and macros for vulkan drivers */
+
+#include <vulkan/vulkan.h>
+
+struct vk_struct_common {
+    VkStructureType sType;
+    struct vk_struct_common *pNext;
+};
+
+#define vk_foreach_struct(__iter, __start) \
+   for (struct vk_struct_common *__iter = (struct vk_struct_common *)(__start); \
+        __iter; __iter = __iter->pNext)
+
+#define vk_foreach_struct_const(__iter, __start) \
+   for (const struct vk_struct_common *__iter = (const struct vk_struct_common *)(__start); \
+        __iter; __iter = __iter->pNext)
+
+#endif /* VK_UTIL_H */