queue_vk.h

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#ifndef FLUTTER_IMPELLER_RENDERER_BACKEND_VULKAN_QUEUE_VK_H_
#define FLUTTER_IMPELLER_RENDERER_BACKEND_VULKAN_QUEUE_VK_H_
 
#include <memory>
 
#include "impeller/base/thread.h"
#include "impeller/renderer/backend/vulkan/vk.h"
 
namespace impeller {
 
struct QueueIndexVK {
  size_t family = 0;
  size_t index = 0;
 
  constexpr bool operator==(const QueueIndexVK& other) const {
    return family == other.family && index == other.index;
  }
};
 
//------------------------------------------------------------------------------
/// @brief      A thread safe object that can be used to access device queues.
///             If multiple objects are created with the same underlying queue,
///             then the external synchronization guarantees of Vulkan queues
///             cannot be met. So care must be taken the same device queue
///             doesn't form the basis of multiple `QueueVK`s.
///
class QueueVK {
 public:
  QueueVK(QueueIndexVK index, vk::Queue queue);
 
  ~QueueVK();
 
  const QueueIndexVK& GetIndex() const;
 
  vk::Result Submit(const vk::SubmitInfo& submit_info,
                    const vk::Fence& fence) const;
 
  vk::Result Present(const vk::PresentInfoKHR& present_info);
 
  void InsertDebugMarker(std::string_view label) const;
 
 private:
  mutable Mutex queue_mutex_;
 
  const QueueIndexVK index_;
  const vk::Queue queue_ IPLR_GUARDED_BY(queue_mutex_);
 
  QueueVK(const QueueVK&) = delete;
 
  QueueVK& operator=(const QueueVK&) = delete;
};
 
//------------------------------------------------------------------------------
/// @brief      The collection of queues used by the context. The queues may all
///             be the same.
///
struct QueuesVK {
  std::shared_ptr<QueueVK> graphics_queue;
  std::shared_ptr<QueueVK> compute_queue;
  std::shared_ptr<QueueVK> transfer_queue;
 
  QueuesVK();
 
  QueuesVK(const vk::Device& device,
           QueueIndexVK graphics,
           QueueIndexVK compute,
           QueueIndexVK transfer);
 
  bool IsValid() const;
};
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_RENDERER_BACKEND_VULKAN_QUEUE_VK_H_