| /* |
| * Copyright © 2022 Collabora Ltd |
| * |
| * 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_DESCRIPTOR_SET_LAYOUT_H |
| #define VK_DESCRIPTOR_SET_LAYOUT_H |
| |
| #include "vk_object.h" |
| |
| #include "util/u_atomic.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| struct vk_descriptor_set_layout { |
| struct vk_object_base base; |
| |
| /** Reference count |
| * |
| * It's often necessary to store a pointer to the descriptor set layout in |
| * the descriptor so that any entrypoint which has access to a descriptor |
| * set also has the layout. While layouts are often passed into various |
| * entrypoints, they're notably missing from vkUpdateDescriptorSets(). In |
| * order to implement descriptor writes, you either need to stash a pointer |
| * to the descriptor set layout in the descriptor set or you need to copy |
| * all of the relevant information. Storing a pointer is a lot cheaper. |
| * |
| * Because descriptor set layout lifetimes and descriptor set lifetimes are |
| * not guaranteed to coincide, we have to reference count if we're going to |
| * do this. |
| */ |
| uint32_t ref_cnt; |
| }; |
| |
| VK_DEFINE_NONDISP_HANDLE_CASTS(vk_descriptor_set_layout, base, |
| VkDescriptorSetLayout, |
| VK_OBJECT_TYPE_DESCRIPTOR_SET_LAYOUT); |
| |
| void *vk_descriptor_set_layout_zalloc(struct vk_device *device, size_t size); |
| |
| void *vk_descriptor_set_layout_multizalloc(struct vk_device *device, |
| struct vk_multialloc *ma); |
| |
| static inline struct vk_descriptor_set_layout * |
| vk_descriptor_set_layout_ref(struct vk_descriptor_set_layout *layout) |
| { |
| assert(layout && layout->ref_cnt >= 1); |
| p_atomic_inc(&layout->ref_cnt); |
| return layout; |
| } |
| |
| static inline void |
| vk_descriptor_set_layout_unref(struct vk_device *device, |
| struct vk_descriptor_set_layout *layout) |
| { |
| assert(layout && layout->ref_cnt >= 1); |
| if (p_atomic_dec_zero(&layout->ref_cnt)) |
| vk_object_free(device, NULL, layout); |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* VK_DESCRIPTOR_SET_LAYOUT_H */ |
| |