From 5ab5046b643b04b9c31fd41cdfca39b9d5f6b99e Mon Sep 17 00:00:00 2001
From: Nicolas James <nj3ahxac@gmail.com>
Date: Sun, 8 Feb 2026 17:49:48 +1100
Subject: track queue submits WIP

---
 src/queue_context.cc | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 src/queue_context.cc

(limited to 'src/queue_context.cc')

diff --git a/src/queue_context.cc b/src/queue_context.cc
new file mode 100644
index 0000000..dbae4c0
--- /dev/null
+++ b/src/queue_context.cc
@@ -0,0 +1,51 @@
+#include "queue_context.hh"
+
+namespace low_latency {
+
+static VkCommandPool make_command_pool(const VkDevice& device,
+                                       const std::uint32_t& queue_family_index,
+                                       const VkuDeviceDispatchTable& vtable) {
+
+    const auto cpci = VkCommandPoolCreateInfo{
+        .sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO,
+        .flags = VK_COMMAND_POOL_CREATE_TRANSIENT_BIT |
+                 VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT,
+        .queueFamilyIndex = queue_family_index,
+    };
+
+    auto command_pool = VkCommandPool{};
+    vtable.CreateCommandPool(device, &cpci, nullptr, &command_pool);
+    return command_pool;
+}
+
+QueueContext::QueueContext(const VkDevice& device, const VkQueue queue,
+                           const std::uint32_t& queue_family_index,
+                           const VkuDeviceDispatchTable& vtable)
+    : device(device), queue(queue), queue_family_index(queue_family_index),
+      vtable(vtable),
+      // Important we make the command pool before the timestamp pool, because it's a dependency.
+      command_pool(make_command_pool(device, queue_family_index, vtable)),
+      timestamp_pool(device, vtable, command_pool) {
+
+    this->semaphore = [&]() -> VkSemaphore {
+        const auto stci = VkSemaphoreTypeCreateInfo{
+            .sType = VK_STRUCTURE_TYPE_SEMAPHORE_TYPE_CREATE_INFO,
+            .semaphoreType = VK_SEMAPHORE_TYPE_TIMELINE,
+            .initialValue = 0,
+        };
+
+        const auto sci = VkSemaphoreCreateInfo{
+            .sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO,
+            .pNext = &stci,
+        };
+
+        auto semaphore = VkSemaphore{};
+        vtable.CreateSemaphore(device, &sci, nullptr, &semaphore);
+        return semaphore;
+    }();
+}
+
+QueueContext::~QueueContext() {
+}
+
+} // namespace low_latency
\ No newline at end of file
-- 
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