vulkan: Add an emulated binary vk_sync type

This wraps a timeline vk_sync type and turns it into a binary one. This is useful for, for instance, driver layered on D3D12. Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Acked-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13427>
2021-11-02 10:20:00 -05:00
parent 36ea90a361
commit c5ac1d1669
4 changed files with 234 additions and 0 deletions
@@ -0,0 +1,79 @@
+/*
+ * Copyright © 2021 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_SYNC_BINARY_H
+#define VK_SYNC_BINARY_H
+
+#include "vk_sync.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct vk_sync_binary_type {
+   struct vk_sync_type sync;
+   const struct vk_sync_type *timeline_type;
+};
+
+struct vk_sync_binary_type
+vk_sync_binary_get_type(const struct vk_sync_type *timeline_type);
+
+/** Implements a binary vk_sync type on top of a timeline vk_sync
+ *
+ * This is useful when targeting Windows APIs such as D3D12 which only have
+ * timelines and have no concept of a binary synchronization object.  Because
+ * binary vk_sync emulation requires tracking additional state (the next time
+ * point), fences and semaphores created from this type cannot support any of
+ * the sharing APIs.
+ */
+struct vk_sync_binary {
+   struct vk_sync sync;
+
+   uint64_t next_point;
+
+   struct vk_sync timeline;
+};
+
+VkResult vk_sync_binary_init(struct vk_device *device,
+                             struct vk_sync *sync,
+                             uint64_t initial_value);
+
+static inline bool
+vk_sync_type_is_vk_sync_binary(const struct vk_sync_type *type)
+{
+   return type->init == vk_sync_binary_init;
+}
+
+static inline struct vk_sync_binary *
+vk_sync_as_binary(struct vk_sync *sync)
+{
+   if (!vk_sync_type_is_vk_sync_binary(sync->type))
+      return NULL;
+
+   return container_of(sync, struct vk_sync_binary, sync);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* VK_TIMELINE_H */