CommandPool & CommandBuffer wrappers.

src/VulkanTutorial.cpp

@@ -184,7 +184,7 @@ void VulkanTutorial::shutdown() {
 
     destroy_swapchain_objects();
 
-    m_context.destroy_command_pool(m_command_pool);
+    m_command_pool.destroy();
     m_index_buffer.destroy();
     m_vertex_buffer.destroy();
     m_context.destroy_descriptor_set_layout(m_descriptor_set_layout);
@@ -260,13 +260,16 @@ void VulkanTutorial::draw_frame() {
     VkPipelineStageFlags stages[] = {
         VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT,
     };
+    VkCommandBuffer command_buffers[] = {
+        m_command_buffers[image_index],
+    };
     VkSubmitInfo submit_info {
         .sType = VK_STRUCTURE_TYPE_SUBMIT_INFO,
         .waitSemaphoreCount = 1,
         .pWaitSemaphores = wait_semaphores,
         .pWaitDstStageMask = stages,
         .commandBufferCount = 1,
-        .pCommandBuffers = &m_command_buffers[image_index],
+        .pCommandBuffers = command_buffers,
         .signalSemaphoreCount = 1,
         .pSignalSemaphores = done_semaphores,
     };
@@ -304,12 +307,6 @@ void VulkanTutorial::destroy_swapchain_objects() {
     if(m_command_pool == VK_NULL_HANDLE)
         return;
 
-    vkFreeCommandBuffers(
-        m_context.device(),
-        m_command_pool,
-        uint32_t(m_command_buffers.size()),
-        m_command_buffers.data()
-    );
     m_command_buffers.clear();
 
     for(auto& buffer: m_uniform_buffers)
@@ -561,22 +558,13 @@ void VulkanTutorial::create_framebuffers() {
 }
 
 void VulkanTutorial::create_command_pool() {
-    if(m_command_pool != VK_NULL_HANDLE)
+    if(!m_command_pool.is_null())
         return;
 
-    VkCommandPoolCreateInfo pool_info {
-        .sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO,
-        .flags = 0,
-        .queueFamilyIndex = m_context.queue_family(GRAPHIC_QUEUE),
-    };
-
-    if(vkCreateCommandPool(
-        m_context.device(),
-        &pool_info,
-        nullptr,
-        &m_command_pool
-    ) != VK_SUCCESS)
-        throw std::runtime_error("failed to create command pool");
+    m_command_pool = vk::CommandPool(
+        m_context,
+        m_context.queue_family(GRAPHIC_QUEUE)
+    );
 }
 
 void VulkanTutorial::create_vertex_buffer() {
@@ -704,23 +692,9 @@ void VulkanTutorial::create_descriptor_sets() {
 }
 
 void VulkanTutorial::create_command_buffers() {
-    m_command_buffers.resize(m_framebuffers.size());
-
-    VkCommandBufferAllocateInfo allocate_info {
-        .sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO,
-        .commandPool = m_command_pool,
-        .level = VK_COMMAND_BUFFER_LEVEL_PRIMARY,
-        .commandBufferCount = uint32_t(m_command_buffers.size()),
-    };
-
-    if(vkAllocateCommandBuffers(
-        m_context.device(),
-        &allocate_info,
-        m_command_buffers.data()
-    ) != VK_SUCCESS)
-        throw std::runtime_error("failed to allocate command buffers");
-
-    for(size_t index = 0; index < m_command_buffers.size(); index += 1) {
+    m_command_buffers.clear();
+    for(size_t index = 0; index < m_framebuffers.size(); index += 1) {
+        m_command_buffers.emplace_back(m_context, m_command_pool);
         VkCommandBuffer command_buffer = m_command_buffers[index];
 
         VkCommandBufferBeginInfo begin_info {

src/VulkanTutorial.h

@@ -1,12 +1,14 @@
 // Copyright 2022 Simon Boyé
 #pragma once
 
-#include <vk/Framebuffer.h>
-#include <vk/Semaphore.h>
-#include <vk/RenderPass.h>
-#include <vk/Pipeline.h>
-#include <vk/Buffer.h>
 #include <vk/Swapchain.h>
+#include <vk/Buffer.h>
+#include <vk/Pipeline.h>
+#include <vk/Framebuffer.h>
+#include <vk/RenderPass.h>
+#include <vk/Semaphore.h>
+#include <vk/CommandBuffer.h>
+#include <vk/CommandPool.h>
 #include <vk/Context.h>
 
 #include <core/math.h>
@@ -78,7 +80,7 @@ private:
     VkPipelineLayout m_pipeline_layout = VK_NULL_HANDLE;
     vk::Pipeline m_pipeline;
     std::vector<vk::Framebuffer> m_framebuffers;
-    VkCommandPool m_command_pool = VK_NULL_HANDLE;
+    vk::CommandPool m_command_pool;
     vk::Buffer m_vertex_buffer;
     vk::Buffer m_index_buffer;
     std::vector<vk::Buffer> m_uniform_buffers;
@@ -86,7 +88,7 @@ private:
     vk::MemoryBlock m_uniform_buffer_memory;
     VkDescriptorPool m_descriptor_pool = VK_NULL_HANDLE;
     std::vector<VkDescriptorSet> m_descriptor_sets;
-    std::vector<VkCommandBuffer> m_command_buffers;
+    std::vector<vk::CommandBuffer> m_command_buffers;
     std::vector<vk::Semaphore> m_render_done;
 
     Vector3 m_camera_position = Vector3(0.0f, 0.0f, -3.0f);

src/vk/CommandBuffer.cpp

@@ -0,0 +1,70 @@
+// Copyright 2022 Simon Boyé
+
+#include <vk/CommandBuffer.h>
+#include <vk/Context.h>
+
+#include <cassert>
+
+
+namespace vk {
+
+
+CommandBuffer::CommandBuffer() noexcept {
+}
+
+CommandBuffer::CommandBuffer(Context& context, VkCommandPool command_pool, VkCommandBufferLevel level)
+    : m_context(&context)
+    , m_command_pool(command_pool)
+{
+    assert(m_context);
+    assert(m_command_pool != VK_NULL_HANDLE);
+
+    VkCommandBufferAllocateInfo allocate_info {
+        .sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO,
+        .commandPool = m_command_pool,
+        .level = level,
+        .commandBufferCount = 1,
+    };
+    if(vkAllocateCommandBuffers(
+        context.device(),
+        &allocate_info,
+        &m_command_buffer
+    ) != VK_SUCCESS)
+        throw std::runtime_error("failed to allocate command pool");
+}
+
+CommandBuffer::CommandBuffer(CommandBuffer&& other) noexcept
+{
+    swap(*this, other);
+}
+
+CommandBuffer::~CommandBuffer() noexcept {
+    if(!is_null())
+        destroy();
+}
+
+
+CommandBuffer& CommandBuffer::operator=(CommandBuffer&& other) noexcept {
+    swap(*this, other);
+    if(other)
+        other.destroy();
+    return *this;
+}
+
+
+void CommandBuffer::destroy() noexcept {
+    assert(!is_null());
+    assert(m_context);
+
+    vkFreeCommandBuffers(
+        m_context->device(),
+        m_command_pool,
+        1,
+        &m_command_buffer
+    );
+
+    m_command_buffer = nullptr;
+}
+
+
+}

src/vk/CommandBuffer.h

@@ -0,0 +1,71 @@
+// Copyright 2022 Simon Boyé
+#pragma once
+
+#include <vk/forward.h>
+
+#include <vulkan/vulkan.h>
+
+
+namespace vk {
+
+
+class CommandBuffer {
+public:
+    CommandBuffer() noexcept;
+    CommandBuffer(Context& context, VkCommandPool command_pool, VkCommandBufferLevel level=VK_COMMAND_BUFFER_LEVEL_PRIMARY);
+    CommandBuffer(const CommandBuffer&) = delete;
+    CommandBuffer(CommandBuffer&& other) noexcept;
+    ~CommandBuffer() noexcept;
+
+    CommandBuffer& operator=(const CommandBuffer&) = delete;
+    CommandBuffer& operator=(CommandBuffer&& other) noexcept;
+
+    explicit inline operator bool() const noexcept {
+        return !is_null();
+    }
+
+    inline bool is_null() const noexcept {
+        return m_command_buffer == VK_NULL_HANDLE;
+    }
+
+    inline const Context* context() const noexcept {
+        return m_context;
+    }
+
+    inline Context* context() noexcept {
+        return m_context;
+    }
+
+    inline const VkCommandPool command_pool() const noexcept {
+        return m_command_pool;
+    }
+
+    inline VkCommandPool command_pool() noexcept {
+        return m_command_pool;
+    }
+
+    inline operator VkCommandBuffer() noexcept {
+        return m_command_buffer;
+    }
+
+    inline VkCommandBuffer command_buffer() noexcept {
+        return m_command_buffer;
+    }
+
+    friend inline void swap(CommandBuffer& command_buffer_0, CommandBuffer& command_buffer_1) noexcept {
+        using std::swap;
+        swap(command_buffer_0.m_context, command_buffer_1.m_context);
+        swap(command_buffer_0.m_command_pool, command_buffer_1.m_command_pool);
+        swap(command_buffer_0.m_command_buffer, command_buffer_1.m_command_buffer);
+    }
+
+    void destroy() noexcept;
+
+private:
+    Context* m_context = nullptr;
+    VkCommandPool m_command_pool = VK_NULL_HANDLE;
+    VkCommandBuffer m_command_buffer = VK_NULL_HANDLE;
+};
+
+
+}

src/vk/CommandPool.cpp

@@ -0,0 +1,67 @@
+// Copyright 2022 Simon Boyé
+
+#include <vk/CommandPool.h>
+#include <vk/Context.h>
+
+#include <cassert>
+
+
+namespace vk {
+
+
+CommandPool::CommandPool() noexcept {
+}
+
+CommandPool::CommandPool(Context& context, uint32_t queue_family, VkCommandPoolCreateFlags flags)
+    : m_context(&context)
+{
+    assert(m_context);
+
+    VkCommandPoolCreateInfo create_info {
+        .sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO,
+        .flags = flags,
+        .queueFamilyIndex = queue_family,
+    };
+    if(vkCreateCommandPool(
+        context.device(),
+        &create_info,
+        nullptr,
+        &m_command_pool
+    ) != VK_SUCCESS)
+        throw std::runtime_error("failed to create command pool");
+}
+
+CommandPool::CommandPool(CommandPool&& other) noexcept
+{
+    swap(*this, other);
+}
+
+CommandPool::~CommandPool() noexcept {
+    if(!is_null())
+        destroy();
+}
+
+
+CommandPool& CommandPool::operator=(CommandPool&& other) noexcept {
+    swap(*this, other);
+    if(other)
+        other.destroy();
+    return *this;
+}
+
+
+void CommandPool::destroy() noexcept {
+    assert(!is_null());
+    assert(m_context);
+
+    vkDestroyCommandPool(
+        m_context->device(),
+        m_command_pool,
+        nullptr
+    );
+
+    m_command_pool = nullptr;
+}
+
+
+}

src/vk/CommandPool.h

@@ -0,0 +1,61 @@
+// Copyright 2022 Simon Boyé
+#pragma once
+
+#include <vk/forward.h>
+
+#include <vulkan/vulkan.h>
+
+
+namespace vk {
+
+
+class CommandPool {
+public:
+    CommandPool() noexcept;
+    CommandPool(Context& context, uint32_t queue_family, VkCommandPoolCreateFlags flags=0);
+    CommandPool(const CommandPool&) = delete;
+    CommandPool(CommandPool&& other) noexcept;
+    ~CommandPool() noexcept;
+
+    CommandPool& operator=(const CommandPool&) = delete;
+    CommandPool& operator=(CommandPool&& other) noexcept;
+
+    explicit inline operator bool() const noexcept {
+        return !is_null();
+    }
+
+    inline bool is_null() const noexcept {
+        return m_command_pool == VK_NULL_HANDLE;
+    }
+
+    inline const Context* context() const noexcept {
+        return m_context;
+    }
+
+    inline Context* context() noexcept {
+        return m_context;
+    }
+
+    inline operator VkCommandPool() noexcept {
+        return m_command_pool;
+    }
+
+    inline VkCommandPool command_pool() noexcept {
+        return m_command_pool;
+    }
+
+    friend inline void swap(CommandPool& command_pool_0, CommandPool& command_pool_1) noexcept {
+        using std::swap;
+        swap(command_pool_0.m_context, command_pool_1.m_context);
+        swap(command_pool_0.m_command_pool, command_pool_1.m_command_pool);
+    }
+
+    void destroy() noexcept;
+
+private:
+    Context* m_context = nullptr;
+    VkCommandPool m_command_pool = VK_NULL_HANDLE;
+};
+
+
+}

src/vk/Context.cpp

@@ -1,6 +1,7 @@
 // Copyright 2022 Simon Boyé
 #include <vk/Context.h>
 #include <vk/Memory.h>
+#include <vk/CommandBuffer.h>
 
 #include <core/utils.h>
 #include <core/Logger.h>
@@ -141,7 +142,7 @@ void Context::shutdown() {
     m_allocator.reset();
 
     m_transfer_fence.destroy();
-    destroy_command_pool(m_transfer_command_pool);
+    m_transfer_command_pool.destroy();
 
     destroy_device(m_device);
     destroy_surface(m_surface);
@@ -282,18 +283,7 @@ VkShaderModule Context::create_shader_module_from_file(const char* path) {
 }
 
 void Context::copy_buffer(VkBuffer dst, VkBuffer src, uint32_t dst_queue_family, VkDeviceSize size) {
-    VkCommandBufferAllocateInfo alloc_info {
-        .sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO,
-        .commandPool = m_transfer_command_pool,
-        .level = VK_COMMAND_BUFFER_LEVEL_PRIMARY,
-        .commandBufferCount = 1,
-    };
-
-    VkCommandBuffer command_buffer;
-    vkAllocateCommandBuffers(m_device, &alloc_info, &command_buffer);
-    auto const command_buffer_guard = make_guard([this, command_buffer]() {
-        vkFreeCommandBuffers(m_device, m_transfer_command_pool, 1, &command_buffer);
-    });
+    CommandBuffer command_buffer(*this, m_transfer_command_pool);
 
     VkCommandBufferBeginInfo begin_info {
         .sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO,
@@ -332,10 +322,13 @@ void Context::copy_buffer(VkBuffer dst, VkBuffer src, uint32_t dst_queue_family,
 
     m_transfer_fence.reset();
 
+    VkCommandBuffer command_buffers[] = {
+        command_buffer
+    };
     VkSubmitInfo submit_info {
         .sType = VK_STRUCTURE_TYPE_SUBMIT_INFO,
         .commandBufferCount = 1,
-        .pCommandBuffers = &command_buffer,
+        .pCommandBuffers = command_buffers,
     };
     vkQueueSubmit(
         queue(m_transfer_queue_index),
@@ -776,20 +769,11 @@ void Context::create_device(const ContextSettings& settings) {
 }
 
 void Context::create_internal_objects() {
-    VkCommandPoolCreateInfo pool_info {
-        .sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO,
-        .flags = 0,
-        .queueFamilyIndex = queue_family(m_transfer_queue_index),
-    };
-    if(vkCreateCommandPool(
-        m_device,
-        &pool_info,
-        nullptr,
-        &m_transfer_command_pool
-    ) != VK_SUCCESS) {
-        throw std::runtime_error("failed to create command pool");
-    }
-
+    m_transfer_command_pool = CommandPool(
+        *this,
+        queue_family(m_transfer_queue_index),
+        VK_COMMAND_POOL_CREATE_TRANSIENT_BIT
+    );
     m_transfer_fence = Fence(*this);
 }
 

src/vk/Context.h

@@ -2,6 +2,7 @@
 #pragma once
 
 #include <vk/forward.h>
+#include <vk/CommandPool.h>
 #include <vk/Fence.h>
 
 #include <core/utils.h>
@@ -194,7 +195,7 @@ private:
     VkPresentModeKHR m_present_mode;
 
     uint32_t m_transfer_queue_index = UINT32_MAX;
-    VkCommandPool m_transfer_command_pool = VK_NULL_HANDLE;
+    CommandPool m_transfer_command_pool;
     Fence m_transfer_fence;
 
     std::vector<ContextDestructionCallback> m_context_destruction_callbacks;