114 lines
4.0 KiB
C
114 lines
4.0 KiB
C
/*
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* Copyright © 2022 Collabora Ltd
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef VK_PIPELINE_LAYOUT_H
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#define VK_PIPELINE_LAYOUT_H
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#include "vk_object.h"
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#include "util/u_atomic.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct vk_descriptor_set_layout;
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#define VK_MESA_PIPELINE_LAYOUT_MAX_SETS 32
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struct vk_pipeline_layout {
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struct vk_object_base base;
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/** Reference count
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*
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* It's often necessary to store a pointer to the descriptor set layout in
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* the descriptor so that any entrypoint which has access to a descriptor
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* set also has the layout. While layouts are often passed into various
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* entrypoints, they're notably missing from vkUpdateDescriptorSets(). In
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* order to implement descriptor writes, you either need to stash a pointer
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* to the descriptor set layout in the descriptor set or you need to copy
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* all of the relevant information. Storing a pointer is a lot cheaper.
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*
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* Because descriptor set layout lifetimes and descriptor set lifetimes are
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* not guaranteed to coincide, we have to reference count if we're going to
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* do this.
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*/
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uint32_t ref_cnt;
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/** VkPipelineLayoutCreateInfo::flags */
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VkPipelineLayoutCreateFlagBits create_flags;
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/** Number of descriptor set layouts in this pipeline layout */
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uint32_t set_count;
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/** Array of pointers to descriptor set layouts, indexed by set index */
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const struct vk_descriptor_set_layout *set_layouts[VK_MESA_PIPELINE_LAYOUT_MAX_SETS];
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/** Destroy callback
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*
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* Will be initially set to vk_pipeline_layout_destroy() but may be set to
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* a driver-specific callback which does driver-specific clean-up and then
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* calls vk_pipeline_layout_destroy().
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*/
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void (*destroy)(struct vk_device *device,
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struct vk_pipeline_layout *layout);
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};
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VK_DEFINE_NONDISP_HANDLE_CASTS(vk_pipeline_layout, base, VkPipelineLayout,
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VK_OBJECT_TYPE_PIPELINE_LAYOUT);
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void *
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vk_pipeline_layout_zalloc(struct vk_device *device, size_t size,
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const VkPipelineLayoutCreateInfo *pCreateInfo);
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void *
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vk_pipeline_layout_multizalloc(struct vk_device *device,
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struct vk_multialloc *ma,
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const VkPipelineLayoutCreateInfo *pCreateInfo);
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void vk_pipeline_layout_destroy(struct vk_device *device,
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struct vk_pipeline_layout *layout);
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static inline struct vk_pipeline_layout *
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vk_pipeline_layout_ref(struct vk_pipeline_layout *layout)
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{
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assert(layout && layout->ref_cnt >= 1);
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p_atomic_inc(&layout->ref_cnt);
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return layout;
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}
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static inline void
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vk_pipeline_layout_unref(struct vk_device *device,
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struct vk_pipeline_layout *layout)
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{
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assert(layout && layout->ref_cnt >= 1);
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if (p_atomic_dec_zero(&layout->ref_cnt))
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layout->destroy(device, layout);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* VK_PIPELINE_LAYOUT_H */
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