feat(vk): Basic command list submit workflow

src/renderer/backend_api.h

@@ -11,7 +11,7 @@
 typedef struct rt_physical_resource_manager_i rt_physical_resource_manager_i;
 
 typedef rt_physical_resource_manager_i rt_render_device_get_physical_resource_manager_fn(void *o);
-typedef rt_result rt_render_device_submit_command_list_fn(void *o, rt_render_command_list *list);
+typedef rt_result rt_render_device_submit_command_list_fn(void *o, const rt_render_command_list *list);
 
 /* Interface for the render device.
  * The device is responsible for executing command lists. */

src/renderer/command_list.c

@@ -49,7 +49,7 @@ void CommandListsOnBeginFrame(void) {
 #define COMMAND_LIST_MAX_LENGTH (COMMAND_LIST_CAPACITY / AVERAGE_COMMAND_DATA_SIZE)
 
 /* Get a new render command list. */
-RT_DLLEXPORT rt_begin_render_command_list_result rtBeginRenderCommandList(void) {
+RT_DLLEXPORT rt_begin_render_command_list_result rtBeginRenderCommandList(rt_render_queue queue) {
     size_t mem_required = COMMAND_LIST_MAX_LENGTH * sizeof(rt_render_command_header) + COMMAND_LIST_CAPACITY;
     rtLockMutex(_mutex);
     void *mem = rtArenaPush(_current_arena, mem_required);
@@ -60,6 +60,7 @@ RT_DLLEXPORT rt_begin_render_command_list_result rtBeginRenderCommandList(void)
     }
     rt_render_command_list list = {
         .headers = mem,
+        .target_queue = queue,
         .data = (void *)((rt_render_command_header *)mem + COMMAND_LIST_MAX_LENGTH),
         .length = 0u,
         .data_capacity =  COMMAND_LIST_CAPACITY,
@@ -72,7 +73,7 @@ RT_DLLEXPORT rt_begin_render_command_list_result rtBeginRenderCommandList(void)
 }
 
 /* Lowlevel function that writes the data to the queue. */
-RT_DLLEXPORT rt_result rtEncodeRenderCommand(rt_render_command_list *list, rt_render_command_type type, rt_render_queue queue, const void *data) {
+RT_DLLEXPORT rt_result rtEncodeRenderCommand(rt_render_command_list *list, rt_render_command_type type, const void *data) {
     size_t data_size = 0u;
     switch (type) {
     case RT_RENDER_COMMAND_DRAW_INDIRECT:
@@ -87,9 +88,7 @@ RT_DLLEXPORT rt_result rtEncodeRenderCommand(rt_render_command_list *list, rt_re
         rtReportError("RENDERER", "Reached maximum lenght or capacity of command list.");
         return RT_OUT_OF_MEMORY;
     }
-
     list->headers[list->length].type = type;
-    list->headers[list->length].target_queue = queue;
     ++list->length;
     char *dest = (char *)list->data + list->data_end;
     memcpy(dest, data, data_size);
@@ -97,7 +96,7 @@ RT_DLLEXPORT rt_result rtEncodeRenderCommand(rt_render_command_list *list, rt_re
     return RT_SUCCESS;
 }
 
-/* Submit a finished command list to the graphics device. The list will not be usable after this function is done. */
-RT_DLLEXPORT rt_result rtSubmitCommandList(rt_render_command_list *list) {
+/* Submit a finished command list to the graphics device. */
+RT_DLLEXPORT rt_result rtSubmitCommandList(const rt_render_command_list *list) {
     return g_device_i.SubmitCommandList(g_device_i.o, list);
 }

src/renderer/command_list.h

@@ -8,6 +8,9 @@
 /* Types of render commands */
 typedef enum {
     RT_RENDER_COMMAND_DRAW_INDIRECT,
+
+
+    RT_RENDER_COMMAND_COUNT,
 } rt_render_command_type;
 
 typedef enum {
@@ -27,15 +30,21 @@ typedef struct {
 
 typedef struct {
     uint32_t type;
-    uint32_t target_queue;
 } rt_render_command_header;
 
 typedef struct {
+    /* One header per command */
     rt_render_command_header *headers;
+
+    /* Contains the command data */
     void *data;
+
     /* Number of encoded commands */
     uint32_t length;
 
+    /* Tne device queue to which this list should be submitted*/
+    uint32_t target_queue;
+
     /* Information used while encoding.
      * In the future, it would be possible to move this to another struct that is discarded after
      * encoding is finished.
@@ -57,20 +66,20 @@ typedef struct {
 } rt_begin_render_command_list_result;
 
 /* Get a new render command list. */
-RT_DLLEXPORT rt_begin_render_command_list_result rtBeginRenderCommandList(void);
+RT_DLLEXPORT rt_begin_render_command_list_result rtBeginRenderCommandList(rt_render_queue queue);
 
 /* Lowlevel function that writes the data to the queue. */
-RT_DLLEXPORT rt_result rtEncodeRenderCommand(rt_render_command_list *list, rt_render_command_type type, rt_render_queue queue, const void *data);
+RT_DLLEXPORT rt_result rtEncodeRenderCommand(rt_render_command_list *list, rt_render_command_type type, const void *data);
 
 /* Helper functions for specific commands */
 RT_INLINE rt_result rtEncodeDrawIndirect(rt_render_command_list *list, const rt_draw_indirect_data *draw_indirect_data) {
-    return rtEncodeRenderCommand(list, RT_RENDER_COMMAND_DRAW_INDIRECT, RT_RENDER_QUEUE_GRAPHICS, draw_indirect_data);
+    return rtEncodeRenderCommand(list, RT_RENDER_COMMAND_DRAW_INDIRECT, draw_indirect_data);
 }
 
 /* *** Submission *** */
 
-/* Submit a finished command list to the graphics device. The list will not be usable after this function is done. */
-RT_DLLEXPORT rt_result rtSubmitCommandList(rt_render_command_list *list);
+/* Submit a finished command list to the graphics device. */
+RT_DLLEXPORT rt_result rtSubmitCommandList(const rt_render_command_list *list);
 
 
 #ifdef __cplusplus

src/renderer/vk/command_buffers.c

@@ -0,0 +1,196 @@
+#include "command_buffers.h"
+#include "device.h"
+
+/* We need one command pool per frame per thread. */
+#include <stdlib.h>
+#include <volk/volk.h>
+#include <runtime/runtime.h>
+#include <runtime/atomics.h>
+
+struct rt_vk_command_pool_set {
+    VkCommandPool graphics;
+    VkCommandPool compute;
+    VkCommandPool transfer;
+} ;
+
+typedef struct {
+    long indices[3];
+} rt_thread_pool_indices;
+
+static RT_THREAD_LOCAL rt_thread_pool_indices t_pool_indices;
+static RT_THREAD_LOCAL bool t_are_indices_initialized[3] = {false, false, false};
+
+rt_vk_command_pool_array rtReserveCommandPoolArray(long max_threads) {
+    rt_vk_command_pool_array array;
+    array.next_unused = 0;
+    array.capacity = 0;
+    array.pools = calloc(max_threads, sizeof(rt_vk_command_pool_set));
+    if (!array.pools)
+        return array;
+    array.capacity = max_threads;
+    return array;
+}
+
+void rtReleaseCommandPoolArray(rt_vk_command_pool_array *array) {
+    free(array->pools);
+    array->pools = NULL;
+    array->capacity = 0;
+    array->next_unused = 0;
+}
+
+static rt_vk_command_pool_set *GetThreadsPoolSet(rt_vk_device *dev, uint32_t frame_id) {
+    uint32_t slot = frame_id % dev->max_frames_in_flight;
+    if (!t_are_indices_initialized[slot]) {
+        /* Alloc the set */
+        rt_vk_command_pool_set *set = NULL;
+        long index = rtAtomic32Inc(&dev->frames[slot].command_pools.next_unused) - 1; /* Inc returns the new value */
+        if (index >= dev->frames[slot].command_pools.capacity) {
+            rtReportError("VK", "Ran out of space for per-thread command buffers. Try to increase r_VkMaxThreads");
+            return NULL;
+        }
+        set = &dev->frames[slot].command_pools.pools[index];
+
+        /* Create the pools */
+        {
+            VkCommandPoolCreateInfo pool_info = {
+                .sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO,
+                .flags = VK_COMMAND_POOL_CREATE_TRANSIENT_BIT,
+                .queueFamilyIndex = dev->graphics_family,
+            };
+            if (vkCreateCommandPool(dev->device, &pool_info, dev->alloc_cb, &set->graphics) != VK_SUCCESS) {
+                rtReportError("VK", "vkCreateCommandPool failed.");
+                return NULL;
+            }
+#ifdef RT_DEBUG
+            uint32_t thread_id = rtGetCurrentThreadId();
+            char name[128];
+            rtSPrint(name, 128, "Graphics Command Pool (FrameSlot %u, Thread %u)", slot, thread_id);
+            VkDebugUtilsObjectNameInfoEXT name_info = {
+                .sType        = VK_STRUCTURE_TYPE_DEBUG_UTILS_OBJECT_NAME_INFO_EXT,
+                .objectHandle = (uint64_t)set->graphics,
+                .objectType   = VK_OBJECT_TYPE_COMMAND_POOL,
+                .pObjectName  = name,
+            };
+            vkSetDebugUtilsObjectNameEXT(dev->device, &name_info);
+#endif
+        }
+        if (dev->compute_family != dev->graphics_family) {
+            VkCommandPoolCreateInfo pool_info = {
+                .sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO,
+                .flags = VK_COMMAND_POOL_CREATE_TRANSIENT_BIT,
+                .queueFamilyIndex = dev->compute_family,
+            };
+            if (vkCreateCommandPool(dev->device, &pool_info, dev->alloc_cb, &set->compute) != VK_SUCCESS) {
+                rtReportError("VK", "vkCreateCommandPool failed.");
+                return NULL;
+            }
+#ifdef RT_DEBUG
+            uint32_t thread_id = rtGetCurrentThreadId();
+            char name[128];
+            rtSPrint(name, 128, "Compute Command Pool (FrameSlot %u, Thread %u)", slot, thread_id);
+            VkDebugUtilsObjectNameInfoEXT name_info = {
+                .sType        = VK_STRUCTURE_TYPE_DEBUG_UTILS_OBJECT_NAME_INFO_EXT,
+                .objectHandle = (uint64_t)set->compute,
+                .objectType   = VK_OBJECT_TYPE_COMMAND_POOL,
+                .pObjectName  = name,
+            };
+            vkSetDebugUtilsObjectNameEXT(dev->device, &name_info);
+#endif
+        } else {
+            set->compute = set->graphics;
+        }
+        if (dev->transfer_family != dev->graphics_family && dev->transfer_family != dev->compute_family) {
+            VkCommandPoolCreateInfo pool_info = {
+                .sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO,
+                .flags = VK_COMMAND_POOL_CREATE_TRANSIENT_BIT,
+                .queueFamilyIndex = dev->transfer_family,
+            };
+            if (vkCreateCommandPool(dev->device, &pool_info, dev->alloc_cb, &set->transfer) != VK_SUCCESS) {
+                rtReportError("VK", "vkCreateCommandPool failed.");
+                return NULL;
+            }
+#ifdef RT_DEBUG
+            uint32_t thread_id = rtGetCurrentThreadId();
+            char name[128];
+            rtSPrint(name, 128, "Transfer Command Pool (FrameSlot %u, Thread %u)", slot, thread_id);
+            VkDebugUtilsObjectNameInfoEXT name_info = {
+                .sType        = VK_STRUCTURE_TYPE_DEBUG_UTILS_OBJECT_NAME_INFO_EXT,
+                .objectHandle = (uint64_t)set->transfer,
+                .objectType   = VK_OBJECT_TYPE_COMMAND_POOL,
+                .pObjectName  = name,
+            };
+            vkSetDebugUtilsObjectNameEXT(dev->device, &name_info);
+#endif
+        }
+        else if (dev->transfer_family == dev->graphics_family) {
+            set->transfer = set->graphics;
+        } else {
+            RT_ASSERT(dev->transfer_family == dev->compute_family, "");
+            set->transfer = set->compute;
+        }
+
+        t_pool_indices.indices[slot] = index;
+        t_are_indices_initialized[slot] = true;
+    }
+
+    long index = t_pool_indices.indices[slot];
+#ifdef RT_DEBUG
+    if (index >= dev->frames[slot].command_pools.next_unused)
+        return NULL;
+#endif
+    return &dev->frames[slot].command_pools.pools[index];
+}
+
+VkCommandPool rtGetGraphicsCommandPool(rt_vk_device *dev) {
+    rt_vk_command_pool_set *set = GetThreadsPoolSet(dev, dev->current_frame_id);
+    return RT_VERIFY(set)->graphics;
+}
+
+VkCommandPool rtGetComputeCommandPool(rt_vk_device *dev) {
+    rt_vk_command_pool_set *set = GetThreadsPoolSet(dev, dev->current_frame_id);
+    return RT_VERIFY(set)->compute;
+}
+
+VkCommandPool rtGetTransferCommandPool(rt_vk_device *dev) {
+    rt_vk_command_pool_set *set = GetThreadsPoolSet(dev, dev->current_frame_id);
+    return RT_VERIFY(set)->transfer;
+}
+
+VkCommandBuffer rtAllocateGraphicsCommandBuffer(rt_vk_device *dev) {
+    VkCommandPool pool = rtGetGraphicsCommandPool(dev);
+    VkCommandBufferAllocateInfo alloc_info = {
+        .sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO,
+        .commandPool =  pool,
+        .level = VK_COMMAND_BUFFER_LEVEL_PRIMARY,
+        .commandBufferCount = 1,
+    };
+    VkCommandBuffer cmdbuf = VK_NULL_HANDLE;
+    vkAllocateCommandBuffers(dev->device, &alloc_info, &cmdbuf);
+    return cmdbuf;
+}
+
+VkCommandBuffer rtAllocateComputeCommandBuffer(rt_vk_device *dev) {
+    VkCommandPool pool = rtGetComputeCommandPool(dev);
+    VkCommandBufferAllocateInfo alloc_info = {
+        .sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO,
+        .commandPool =  pool,
+        .level = VK_COMMAND_BUFFER_LEVEL_PRIMARY,
+        .commandBufferCount = 1,
+    };
+    VkCommandBuffer cmdbuf = VK_NULL_HANDLE;
+    vkAllocateCommandBuffers(dev->device, &alloc_info, &cmdbuf);
+    return cmdbuf;
+}
+
+VkCommandBuffer rtAllocateTransferCommandBuffer(rt_vk_device *dev) {
+    VkCommandPool pool = rtGetTransferCommandPool(dev);
+    VkCommandBufferAllocateInfo alloc_info = {
+        .sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO,
+        .commandPool =  pool,
+        .level = VK_COMMAND_BUFFER_LEVEL_PRIMARY,
+        .commandBufferCount = 1,
+    };
+    VkCommandBuffer cmdbuf = VK_NULL_HANDLE;
+    vkAllocateCommandBuffers(dev->device, &alloc_info, &cmdbuf);
+    return cmdbuf;
+}

src/renderer/vk/command_buffers.h

@@ -0,0 +1,29 @@
+#ifndef RT_VK_COMMAND_LISTS_H
+#define RT_VK_COMMAND_LISTS_H
+
+#include <volk/volk.h>
+
+struct rt_vk_device;
+
+typedef struct rt_vk_command_pool_set rt_vk_command_pool_set;
+
+/* Contains an array of command pools. Threads safe an index into the array
+ * to access their own command pool set. */
+typedef struct {
+    rt_vk_command_pool_set *pools;
+    long capacity;
+    long next_unused;
+} rt_vk_command_pool_array;
+
+rt_vk_command_pool_array rtReserveCommandPoolArray(long max_threads);
+void rtReleaseCommandPoolArray(rt_vk_command_pool_array *array);
+
+VkCommandPool rtGetGraphicsCommandPool(struct rt_vk_device *dev);
+VkCommandPool rtGetComputeCommandPool(struct rt_vk_device *dev);
+VkCommandPool rtGetTransferCommandPool(struct rt_vk_device *dev);
+
+VkCommandBuffer rtAllocateGraphicsCommandBuffer(struct rt_vk_device *dev);
+VkCommandBuffer rtAllocateComputeCommandBuffer(struct rt_vk_device *dev);
+VkCommandBuffer rtAllocateTransferCommandBuffer(struct rt_vk_device *dev);
+
+#endif

src/renderer/vk/device.c

@@ -19,6 +19,7 @@ RT_CVAR_I(r_VkEnableAPIAllocTracking,
 RT_CVAR_S(r_VkPhysDeviceName, "Name of the selected physical device. Default: \"\"", "");
 
 RT_CVAR_I(r_VkMaxFramesInFlight, "Maximum number of frames in flight. [2/3] Default: 2", 2);
+RT_CVAR_UI(r_VkMaxThreads, "Maximum number of threads used. (Default: 128)", 128);
 
 static VkAllocationCallbacks _tracking_alloc_cbs;
 
@@ -564,6 +565,8 @@ static rt_result CreatePerFrameObjects(rt_vk_device *dev) {
         name_info.objectHandle = (uint64_t)dev->frames[i].swapchain_transitioned;
         vkSetDebugUtilsObjectNameEXT(dev->device, &name_info);
 #endif
+
+        dev->frames[i].command_pools = rtReserveCommandPoolArray(r_VkMaxThreads.ui);
     }
     return RT_SUCCESS;
 }
@@ -627,6 +630,10 @@ rt_create_vk_device_result rtCreateVkDevice(const rt_renderer_window_info *info)
         goto out;
     dev.bindless_registry = bindless_registry_result.bindless_registry;
 
+    dev.created_pools = calloc(128 * 9, sizeof(VkCommandPool));
+    dev.created_pool_count = 0;
+    dev.max_created_pools = 128 * 9;
+
     rt_time_delta initTime = rtTimeBetween(initBegin, rtTimeNow());
     rtLog("VK", "Init complete. Took %lf seconds.", initTime);
 
@@ -637,6 +644,7 @@ out:
 void rtDestroyVkDevice(rt_vk_device *dev) {
     rtLog("VK", "Shutdown");
     vkDeviceWaitIdle(dev->device);
+    free(dev->created_pools);
     rtDestroyVkBindlessRegistry(&dev->bindless_registry);
     rtDestroyVkPhysicalResourceManager(&dev->phys_res_mgr);
     DestroySwapchain(dev);
@@ -662,25 +670,98 @@ rt_physical_resource_manager_i rtVkDevGetPhysicalResourceManager(void *o) {
     return iface;
 }
 
-rt_result rtVkDevSubmitCommandList(void *o, rt_render_command_list *list) {
-    /* Dummy implementation */
-    RT_UNUSED(o);
 
-    size_t data_off = 0;
-    for (uint32_t i = 0; i < list->length; ++i) {
-        if (list->headers[i].type != RT_RENDER_COMMAND_DRAW_INDIRECT)
-            break;
-        rtLog("VK", "DrawIndirect %u", i);
-        rtLog("VK", "Target queue: %u", list->headers[i].target_queue);
-
-        RT_VERIFY(data_off < list->data_end);
-        rt_draw_indirect_data *data = (rt_draw_indirect_data *)((char *)list->data + data_off);
-        rtLog("VK", "buffer %u draw_count %u offset %u stride %u",
-            data->buffer.value,
-            data->draw_count,
-            data->offset,
-            data->stride);
-        data_off += sizeof(rt_draw_indirect_data);
+/* Commands */
+static rt_result DrawIndirectImpl(rt_vk_device *dev, VkCommandBuffer cmdbuf, const void *_data) {
+    const rt_draw_indirect_data *data = _data;
+    const rt_vk_physical_resource *buffer_resource = rtGetVkPhysicalResource(&dev->phys_res_mgr, data->buffer);
+    if (!buffer_resource) {
+        rtLog("VK", "Invalid buffer in draw indirect data");
+        return RT_INVALID_VALUE;
     }
+    RT_ASSERT(buffer_resource->type == RT_RENDER_RESOURCE_TYPE_BUFFER,
+        "Buffer handle in draw indirect data does not reference a buffer object");
+    vkCmdDrawIndirect(cmdbuf, buffer_resource->buffer, data->offset, data->draw_count, data->stride);
     return RT_SUCCESS;
+}
+
+typedef rt_result rt_vk_render_command_impl_fn(rt_vk_device *dev, VkCommandBuffer cmdbuf, const void *data);
+
+static size_t _command_data_sizes[RT_RENDER_COMMAND_COUNT] = {
+    sizeof(rt_draw_indirect_data),
+};
+
+static rt_vk_render_command_impl_fn *_command_impls[RT_RENDER_COMMAND_COUNT] = {
+    DrawIndirectImpl,
+};
+
+rt_result rtVkDevSubmitCommandList(void *o, const rt_render_command_list *list) {
+    rt_vk_device *dev = o;
+    size_t data_off = 0;
+    rt_result res = RT_SUCCESS;
+
+    /* Prepare command buffer */
+    VkQueue queue = VK_NULL_HANDLE;
+    VkCommandBuffer cmdbuf = VK_NULL_HANDLE;
+    if (list->target_queue == RT_RENDER_QUEUE_GRAPHICS) {
+        cmdbuf = rtAllocateComputeCommandBuffer(dev);
+        queue = dev->graphics_queue;
+    }
+    else if (list->target_queue == RT_RENDER_QUEUE_COMPUTE) {
+        cmdbuf = rtAllocateComputeCommandBuffer(dev);
+        queue = dev->compute_queue;
+    }
+    else if (list->target_queue == RT_RENDER_QUEUE_TRANSFER) {
+        cmdbuf = rtAllocateTransferCommandBuffer(dev);
+        queue = dev->transfer_queue;
+    }
+    else {
+        RT_ASSERT("VK", "Invalid target queue");
+        return RT_INVALID_VALUE;
+    }
+    VkCommandBufferBeginInfo begin_info = {.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO,
+    .flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT};
+    if (vkBeginCommandBuffer(cmdbuf, &begin_info) != VK_SUCCESS) {
+        rtLog("VK", "vkBeginCommandBuffer failed");
+        return RT_UNKNOWN_ERROR;
+    }
+
+    /* Iterate over all commands and decode them */
+    for (uint32_t i = 0; i < list->length; ++i) {
+        rt_render_command_header header = list->headers[i];
+        RT_ASSERT(header.type < RT_RENDER_COMMAND_COUNT,
+            "Invalid render command type.");
+        const void *data = (const char *)list->data + data_off;
+        res = _command_impls[header.type](dev, cmdbuf, data);
+        if (res != RT_SUCCESS)
+            break;
+        data_off += _command_data_sizes[header.type];
+    }
+    if (res != RT_SUCCESS) {
+        return res;
+    }
+
+    /* End the command buffers and create submit info */
+    vkEndCommandBuffer(cmdbuf);
+
+    /* Submit it! */
+    VkCommandBufferSubmitInfo cmdbuf_info = {
+        .sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_SUBMIT_INFO,
+        .commandBuffer = cmdbuf
+    };
+
+    VkSubmitInfo2 submit_info = {
+        .sType = VK_STRUCTURE_TYPE_SUBMIT_INFO_2,
+        .commandBufferInfoCount = 1,
+        .pCommandBufferInfos = &cmdbuf_info,
+        .waitSemaphoreInfoCount = 0,
+        .pWaitSemaphoreInfos = NULL,
+        .signalSemaphoreInfoCount = 0,
+        .pSignalSemaphoreInfos = NULL,
+    };
+    if (vkQueueSubmit2(queue, 1, &submit_info, VK_NULL_HANDLE) != VK_SUCCESS) {
+        rtLog("VK"," vkQueueSubmit2 failed");
+        res = RT_UNKNOWN_ERROR;
+    }
+    return res;
 }

src/renderer/vk/device.h

@@ -8,6 +8,7 @@
 
 #include "physical_resource_manager.h"
 #include "bindless_registry.h"
+#include "command_buffers.h"
 
 #ifdef _WIN32
 struct HINSTANCE__;
@@ -31,6 +32,8 @@ typedef struct {
     VkSemaphore render_finished;
     VkSemaphore image_available;
     VkSemaphore swapchain_transitioned;
+
+    rt_vk_command_pool_array command_pools;
 } rt_vk_frame_data;
 
 typedef struct rt_vk_device {
@@ -76,6 +79,11 @@ typedef struct rt_vk_device {
     rt_vk_physical_resource_manager phys_res_mgr;
     rt_vk_bindless_registry bindless_registry;
 
+    /* *** Save created command pools in a list to clean them up at exit */
+    VkCommandPool *created_pools;
+    long created_pool_count;
+    long max_created_pools;
+
     /* *** Debug utils *** */
 #ifdef RT_DEBUG
     VkDebugUtilsMessengerEXT messenger;
@@ -93,6 +101,6 @@ void rtDestroyVkDevice(rt_vk_device *dev);
 
 /* rt_render_device_i functions */
 rt_physical_resource_manager_i rtVkDevGetPhysicalResourceManager(void *o);
-rt_result rtVkDevSubmitCommandList(void *o, rt_render_command_list *list);
+rt_result rtVkDevSubmitCommandList(void *o, const rt_render_command_list *list);
 
 #endif

src/renderer/vk/init.c

@@ -7,6 +7,7 @@
 extern rt_cvar r_VkEnableAPIAllocTracking;
 extern rt_cvar r_VkPhysDeviceName;
 extern rt_cvar r_VkMaxFramesInFlight;
+extern rt_cvar r_VkMaxThreads;
 extern rt_cvar r_VkPreferMailboxMode;
 extern rt_cvar r_VkPreferRelaxedMode;
 extern rt_cvar r_VkEnableVSync;
@@ -21,6 +22,7 @@ void VkRegisterCVARs(void) {
     rtRegisterCVAR(&r_VkEnableAPIAllocTracking);
     rtRegisterCVAR(&r_VkPhysDeviceName);
     rtRegisterCVAR(&r_VkMaxFramesInFlight);
+    rtRegisterCVAR(&r_VkMaxThreads);
     rtRegisterCVAR(&r_VkPreferMailboxMode);
     rtRegisterCVAR(&r_VkPreferRelaxedMode);
     rtRegisterCVAR(&r_VkEnableVSync);

src/renderer/vk/meson.build

@@ -14,10 +14,12 @@ if get_option('build_vk')
 
   vk_renderer_lib = library('rtvk',
     'bindless_registry.h',
+    'command_buffers.h',
     'device.h',
     'physical_resource_manager.h',
 
     'bindless_registry.c',
+    'command_buffers.c',
     'device.c',
     'init.c',
     'physical_resource_manager.c',

src/renderer/vk/physical_resource_manager.c

@@ -147,6 +147,17 @@ void rtVkPhysicalResourceManagerDestroy(void *o, rt_render_resource_handle handl
     rtUnlockWrite(&phys_res_mgr->lock);
 }
 
+rt_vk_physical_resource *rtGetVkPhysicalResource(rt_vk_physical_resource_manager *phys_res_mgr, rt_render_resource_handle handle) {
+    rt_vk_physical_resource *resource = NULL;
+    rtLockRead(&phys_res_mgr->lock);
+    uint32_t slot = rtHashtableLookup(&phys_res_mgr->resource_lut, handle.value, UINT32_MAX);
+    if (slot != UINT32_MAX) {
+        resource = &phys_res_mgr->resources[slot];
+    }
+    rtUnlockRead(&phys_res_mgr->lock);
+    return resource;
+}
+
 /* Call this with a held write lock! */
 static uint32_t AllocStorageSlot(rt_vk_physical_resource_manager *phys_res_mgr, rt_render_resource_handle h) {
     if (phys_res_mgr->free_slot_count > 0u) {

src/renderer/vk/physical_resource_manager.h

@@ -52,6 +52,8 @@ rt_create_vk_physical_resource_manager_result rtCreateVkPhysicalResourceManager(
 
 void rtDestroyVkPhysicalResourceManager(rt_vk_physical_resource_manager *phys_res_mgr);
 
+rt_vk_physical_resource *rtGetVkPhysicalResource(rt_vk_physical_resource_manager *phys_res_mgr, rt_render_resource_handle handle);
+
 /* rt_physical_resource_manager_i functions */
 bool rtVkPhysicalResourceManagerIsPresent(void *o, rt_render_resource_handle handle);
 void rtVkPhysicalResourceManagerDestroy(void *o, rt_render_resource_handle handle);