From 69068165f49ca204025410ab02546318997edaa3 Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Wed, 15 Apr 2026 16:53:36 +0200
Subject: kernel: improve bht speed using memory mapping

---
 .../filesystem/storage_boot_module_fixture.hpp     | 32 ++++++++++++++++------
 .../filesystem/storage_boot_module_vfs_fixture.hpp |  9 +++---
 2 files changed, 28 insertions(+), 13 deletions(-)

(limited to 'kernel/include')

diff --git a/kernel/include/kernel/test_support/filesystem/storage_boot_module_fixture.hpp b/kernel/include/kernel/test_support/filesystem/storage_boot_module_fixture.hpp
index ee658e2..4b49684 100644
--- a/kernel/include/kernel/test_support/filesystem/storage_boot_module_fixture.hpp
+++ b/kernel/include/kernel/test_support/filesystem/storage_boot_module_fixture.hpp
@@ -3,11 +3,10 @@
 
 #include "kapi/boot_module/boot_module_registry.hpp"
 
-#include <kstd/string>
-#include <kstd/vector>
-
 #include <cstddef>
 #include <filesystem>
+#include <string>
+#include <vector>
 
 namespace kernel::tests::filesystem
 {
@@ -16,16 +15,33 @@ namespace kernel::tests::filesystem
     ~storage_boot_module_fixture();
 
     auto setup_modules(std::size_t module_count, std::size_t module_size = 4096) -> void;
-    auto setup_modules_from_img(kstd::vector<kstd::string> const & module_names,
-                                kstd::vector<std::filesystem::path> const & img_paths) -> void;
+    auto setup_modules_from_img(std::vector<std::string> const & module_names,
+                                std::vector<std::filesystem::path> const & img_paths) -> void;
 
   protected:
+    struct mapped_image
+    {
+      explicit mapped_image(std::filesystem::path path);
+      ~mapped_image();
+
+      mapped_image(mapped_image const &) = delete;
+      auto operator=(mapped_image const &) -> mapped_image & = delete;
+
+      mapped_image(mapped_image &&) noexcept;
+      auto operator=(mapped_image &&) noexcept -> mapped_image &;
+
+      int file_descriptor;
+      std::byte * mapping;
+      std::size_t size;
+    };
+
     kapi::boot_modules::boot_module_registry m_registry{};
-    kstd::vector<kstd::string> m_module_names{};
-    kstd::vector<kstd::vector<std::byte>> m_module_data{};
+    std::vector<std::string> m_module_names{};
+    std::vector<std::vector<std::byte>> m_module_data{};
+    std::vector<mapped_image> m_mapped_images{};
 
   private:
-    auto setup_module_from_img(kstd::string const & module_name, std::filesystem::path const & img_path) -> void;
+    auto setup_module_from_img(std::string const & module_name, std::filesystem::path const & img_path) -> void;
   };
 }  // namespace kernel::tests::filesystem
 
diff --git a/kernel/include/kernel/test_support/filesystem/storage_boot_module_vfs_fixture.hpp b/kernel/include/kernel/test_support/filesystem/storage_boot_module_vfs_fixture.hpp
index 98012b0..bd1c289 100644
--- a/kernel/include/kernel/test_support/filesystem/storage_boot_module_vfs_fixture.hpp
+++ b/kernel/include/kernel/test_support/filesystem/storage_boot_module_vfs_fixture.hpp
@@ -3,11 +3,10 @@
 
 #include "kernel/test_support/filesystem/storage_boot_module_fixture.hpp"
 
-#include <kstd/string>
-#include <kstd/vector>
-
 #include <cstddef>
 #include <filesystem>
+#include <string>
+#include <vector>
 
 namespace kernel::tests::filesystem
 {
@@ -16,8 +15,8 @@ namespace kernel::tests::filesystem
     ~storage_boot_module_vfs_fixture();
 
     auto setup_modules_and_init_vfs(std::size_t module_count, std::size_t module_size = 4096) -> void;
-    auto setup_modules_from_img_and_init_vfs(kstd::vector<kstd::string> const & module_names,
-                                             kstd::vector<std::filesystem::path> const & img_paths) -> void;
+    auto setup_modules_from_img_and_init_vfs(std::vector<std::string> const & module_names,
+                                             std::vector<std::filesystem::path> const & img_paths) -> void;
   };
 }  // namespace kernel::tests::filesystem
 
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