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https://gitlab.freedesktop.org/mesa/vulkan-wsi-layer.git
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ba0684b5e0
The VK_KHR_external_[fence|semaphore]_fd extensions allow sync primitives to be signalled without the use of QueueSubmit. Using these extensions in AcquireNextImage instead of using QueueSubmit offers two advantages: (1) there is no waiting for work to complete in the queue before the primitives are signalled and (2) there is no data race if the application happens to call QueueSubmit on the same queue at the same time. The QueueSubmit method of signalling sync primitives continues to be used for ICDs that do not support the external FD extensions. Signed-off-by: David Harvey-Macaulay <david.harvey-macaulay@arm.com> Change-Id: Ib4a922d44430110e2353a4e0221e27017e72abab
116 lines
3.8 KiB
C++
116 lines
3.8 KiB
C++
/*
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* Copyright (c) 2019, 2021-2022 Arm Limited.
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*
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* 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 shall be included in all
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* copies or substantial portions of the 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 THE
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* 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 FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#pragma once
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#include "custom_allocator.hpp"
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#include "helpers.hpp"
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#include <vector>
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#include <algorithm>
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#include <vulkan/vulkan.h>
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namespace util
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{
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/**
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* @brief A helper class for storing a vector of extension names
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*
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* @note This class does not store the extension versions.
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*/
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class extension_list : private noncopyable
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{
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public:
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extension_list(const util::allocator& allocator);
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/**
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* @brief Get the allocator used to manage the memory of this object.
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*/
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const util::allocator get_allocator() const
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{
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return m_alloc;
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}
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/**
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* @brief Append pointers to extension strings to the given vector.
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*
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* @warning Pointers in the vector are referring to string allocated in this extension_list and will become invalid
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* if the extension_list is modified (e.g. by adding/removing elements.)
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*
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* @param[out] out A vector of C strings to which all extension are appended.
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*
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* @return Indicates whether the operation was successful. If this is @c VK_ERROR_OUT_OF_HOST_MEMORY,
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* then @p out is unmodified.
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*/
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VkResult get_extension_strings(util::vector<const char*> &out) const;
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/**
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* @brief Check if this extension list contains all the extensions listed in req.
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*/
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bool contains(const extension_list &req) const;
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/**
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* @brief Check if this extension list contains the extension specified by ext.
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*/
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bool contains(const char *ext) const;
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/**
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* @brief Remove an extension from a extension list
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*/
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void remove(const char *ext);
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VkResult add(VkExtensionProperties ext_prop);
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VkResult add(const VkExtensionProperties *props, uint32_t count);
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VkResult add(const extension_list &ext_list);
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VkResult add(const char *const *extensions, uint32_t count);
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VkResult add(const char *extension)
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{
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return add(&extension, 1);
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}
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/**
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* @brief Perform intersection between extensions and add them to the list.
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*
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* Adds the extensions from @p extensions that are also part of @p extensions_subset.
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*
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* @param extensions A list with the names of the extensions to be added.
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* @param count Length of the extensions list.
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* @param extensions_subset A list with the names of the target extensions.
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* @param subset_count Length of the target list.
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*
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* @return VK_SUCCESS on success, otherwise an error.
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*/
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VkResult add(const char *const *extensions, uint32_t count, const char *const *extensions_subset,
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uint32_t subset_count);
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private:
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util::allocator m_alloc;
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/**
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* @note We are using VkExtensionProperties to store the extension name only
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*/
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util::vector<VkExtensionProperties> m_ext_props;
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};
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} // namespace util
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