working on Wayland surfaces

src/soft/SoftImage.zig

@@ -47,9 +47,9 @@ pub fn getMemoryRequirements(_: *Interface, requirements: *vk.MemoryRequirements
 }
 
 pub fn getClearFormat(self: *Self) VkError!vk.Format {
-    return if (base.vku.vkuFormatIsSINT(@intCast(@intFromEnum(self.interface.format))))
+    return if (base.c.vkuFormatIsSINT(@intCast(@intFromEnum(self.interface.format))))
         .r32g32b32a32_sint
-    else if (base.vku.vkuFormatIsUINT(@intCast(@intFromEnum(self.interface.format))))
+    else if (base.c.vkuFormatIsUINT(@intCast(@intFromEnum(self.interface.format))))
         .r32g32b32a32_uint
     else
         .r32g32b32a32_sfloat;

src/soft/SoftPhysicalDevice.zig

@@ -2,7 +2,7 @@ const std = @import("std");
 const vk = @import("vulkan");
 const base = @import("base");
 const lib = @import("lib.zig");
-const cpuinfo = @cImport(@cInclude("cpuinfo.h"));
+const cpuinfo = lib.c;
 
 const SoftDevice = @import("SoftDevice.zig");
 

src/soft/c_includes.h

@@ -0,0 +1 @@
+#include <cpuinfo.h>

src/soft/lib.zig

@@ -2,6 +2,8 @@ const std = @import("std");
 const vk = @import("vulkan");
 pub const base = @import("base");
 
+pub const c = @import("soft_c");
+
 pub const Device = @import("device/Device.zig");
 
 pub const SoftInstance = @import("SoftInstance.zig");

src/vulkan/Dispatchable.zig

@@ -1,8 +1,6 @@
 const std = @import("std");
 const vk = @import("vulkan");
-const c = @cImport({
-    @cInclude("vulkan/vk_icd.h");
-});
+const c = @import("lib.zig").c;
 
 const VkError = @import("error_set.zig").VkError;
 

src/vulkan/c_includes.h

@@ -0,0 +1,2 @@
+#include <vulkan/vk_icd.h>
+#include <vulkan/utility/vk_format_utils.h>

src/vulkan/format.zig

@@ -25,9 +25,9 @@ pub fn fromAspect(format: vk.Format, aspect: vk.ImageAspectFlags) vk.Format {
 
 pub fn toAspect(format: vk.Format) vk.ImageAspectFlags {
     var aspect: vk.ImageAspectFlags = .{};
-    if (lib.vku.vkuFormatHasDepth(@intCast(@intFromEnum(format))))
+    if (lib.c.vkuFormatHasDepth(@intCast(@intFromEnum(format))))
         aspect.depth_bit = true;
-    if (lib.vku.vkuFormatHasStencil(@intCast(@intFromEnum(format))))
+    if (lib.c.vkuFormatHasStencil(@intCast(@intFromEnum(format))))
         aspect.stencil_bit = true;
 
     if (aspect.toInt() == 0)
@@ -37,7 +37,7 @@ pub fn toAspect(format: vk.Format) vk.ImageAspectFlags {
 }
 
 pub inline fn texelSize(format: vk.Format) usize {
-    return lib.vku.vkuFormatTexelBlockSize(@intCast(@intFromEnum(format)));
+    return lib.c.vkuFormatTexelBlockSize(@intCast(@intFromEnum(format)));
 }
 
 pub inline fn supportsColorAttachemendBlend(format: vk.Format) bool {
@@ -89,43 +89,43 @@ pub inline fn sliceMemSize(format: vk.Format, width: usize, height: usize) usize
 }
 
 pub inline fn isDepthAndStencil(format: vk.Format) bool {
-    return lib.vku.vkuFormatIsDepthAndStencil(@intCast(@intFromEnum(format)));
+    return lib.c.vkuFormatIsDepthAndStencil(@intCast(@intFromEnum(format)));
 }
 
 pub inline fn isDepth(format: vk.Format) bool {
-    return lib.vku.vkuFormatHasDepth(@intCast(@intFromEnum(format)));
+    return lib.c.vkuFormatHasDepth(@intCast(@intFromEnum(format)));
 }
 
 pub inline fn isStencil(format: vk.Format) bool {
-    return lib.vku.vkuFormatHasStencil(@intCast(@intFromEnum(format)));
+    return lib.c.vkuFormatHasStencil(@intCast(@intFromEnum(format)));
 }
 
 pub inline fn isSrgb(format: vk.Format) bool {
-    return lib.vku.vkuFormatIsSRGB(@intCast(@intFromEnum(format)));
+    return lib.c.vkuFormatIsSRGB(@intCast(@intFromEnum(format)));
 }
 
 pub inline fn isSfloat(format: vk.Format) bool {
-    return lib.vku.vkuFormatIsSFLOAT(@intCast(@intFromEnum(format)));
+    return lib.c.vkuFormatIsSFLOAT(@intCast(@intFromEnum(format)));
 }
 
 pub inline fn isSint(format: vk.Format) bool {
-    return lib.vku.vkuFormatIsSINT(@intCast(@intFromEnum(format)));
+    return lib.c.vkuFormatIsSINT(@intCast(@intFromEnum(format)));
 }
 
 pub inline fn isSnorm(format: vk.Format) bool {
-    return lib.vku.vkuFormatIsSNORM(@intCast(@intFromEnum(format)));
+    return lib.c.vkuFormatIsSNORM(@intCast(@intFromEnum(format)));
 }
 
 pub inline fn isUfloat(format: vk.Format) bool {
-    return lib.vku.vkuFormatIsUFLOAT(@intCast(@intFromEnum(format)));
+    return lib.c.vkuFormatIsUFLOAT(@intCast(@intFromEnum(format)));
 }
 
 pub inline fn isUint(format: vk.Format) bool {
-    return lib.vku.vkuFormatIsUINT(@intCast(@intFromEnum(format)));
+    return lib.c.vkuFormatIsUINT(@intCast(@intFromEnum(format)));
 }
 
 pub inline fn isUnorm(format: vk.Format) bool {
-    return lib.vku.vkuFormatIsUNORM(@intCast(@intFromEnum(format)));
+    return lib.c.vkuFormatIsUNORM(@intCast(@intFromEnum(format)));
 }
 
 pub inline fn isFloat(format: vk.Format) bool {

src/vulkan/lib.zig

@@ -3,9 +3,7 @@
 const std = @import("std");
 const builtin = @import("builtin");
 const vk = @import("vulkan");
-pub const vku = @cImport({
-    @cInclude("vulkan/utility/vk_format_utils.h");
-});
+pub const c = @import("base_c");
 
 pub const zm = @import("zmath");
 
@@ -48,6 +46,9 @@ pub const RenderPass = @import("RenderPass.zig");
 pub const Sampler = @import("Sampler.zig");
 pub const ShaderModule = @import("ShaderModule.zig");
 
+pub const SurfaceKHR = @import("wsi/SurfaceKHR.zig");
+pub const SwapchainKHR = @import("wsi/SwapchainKHR.zig");
+
 pub const VULKAN_VENDOR_ID = @typeInfo(vk.VendorId).@"enum".fields[@typeInfo(vk.VendorId).@"enum".fields.len - 1].value + 1;
 
 pub const DRIVER_DEBUG_ALLOCATOR_ENV_NAME = "STROLL_DEBUG_ALLOCATOR";

src/vulkan/lib_vulkan.zig

@@ -2194,7 +2194,7 @@ pub export fn strollResetCommandBuffer(p_cmd: vk.CommandBuffer, flags: vk.Comman
 
 // WSI functions ===================================================================================================================================
 
-pub export fn strollCreateSwapchainKHR(p_device: vk.Device, info: *const vk.SwapchainCreateInfoKHR, callbacks: ?*const vk.AllocationCallbacks, p_swapchain: *vk.Swapchain) callconv(vk.vulkan_call_conv) vk.Result {
+pub export fn strollCreateSwapchainKHR(p_device: vk.Device, info: *const vk.SwapchainCreateInfoKHR, callbacks: ?*const vk.AllocationCallbacks, p_swapchain: *vk.SwapchainKHR) callconv(vk.vulkan_call_conv) vk.Result {
     entryPointBeginLogTrace(.vkCreateSwapchainKHR);
     defer entryPointEndLogTrace();
 
@@ -2208,7 +2208,7 @@ pub export fn strollCreateSwapchainKHR(p_device: vk.Device, info: *const vk.Swap
     return .success;
 }
 
-pub export fn strollDestroySwapchainKHR(p_device: vk.Device, p_swapchain: vk.Swapchain, callbacks: ?*const vk.AllocationCallbacks) callconv(vk.vulkan_call_conv) void {
+pub export fn strollDestroySwapchainKHR(p_device: vk.Device, p_swapchain: vk.SwapchainKHR, callbacks: ?*const vk.AllocationCallbacks) callconv(vk.vulkan_call_conv) void {
     entryPointBeginLogTrace(.vkDestroySwapchainKHR);
     defer entryPointEndLogTrace();
 
@@ -2223,7 +2223,7 @@ pub export fn strollCreateWaylandSurfaceKHR(p_device: vk.Device, info: *const vk
     entryPointBeginLogTrace(.vkCreateWaylandSurfaceKHR);
     defer entryPointEndLogTrace();
 
-    if (info.s_type != .surface_create_info_khr) {
+    if (info.s_type != .wayland_surface_create_info_khr) {
         return .error_validation_failed;
     }
     const allocator = VulkanAllocator.init(callbacks, .object).allocator();

src/vulkan/wsi/PresentImage.zig

@@ -23,7 +23,7 @@ pub fn init(device: *Device, allocator: std.mem.Allocator, info: *const vk.Image
     const image = try device.createImage(allocator, info);
     errdefer image.destroy(allocator);
 
-    const requirements: vk.MemoryRequirements = undefined;
+    var requirements: vk.MemoryRequirements = undefined;
     try image.getMemoryRequirements(&requirements);
 
     const memory = try device.allocateMemory(allocator, &.{

src/vulkan/wsi/SurfaceKHR.zig

@@ -1,11 +1,92 @@
 const std = @import("std");
 const vk = @import("vulkan");
-const lib = @import("lib.zig");
+const lib = @import("../lib.zig");
 
 const VkError = @import("../error_set.zig").VkError;
 
 const Device = @import("../Device.zig");
+const PresentImage = @import("PresentImage.zig");
+const SwapchainKHR = @import("SwapchainKHR.zig");
 
 const Self = @This();
-
 pub const ObjectType: vk.ObjectType = .surface_khr;
+
+const formats = [_]vk.SurfaceFormatKHR{
+    .{ .format = .b8g8r8a8_unorm, .color_space = .srgb_nonlinear_khr },
+    .{ .format = .b8g8r8a8_srgb, .color_space = .srgb_nonlinear_khr },
+};
+
+const present_modes = [_]vk.PresentModeKHR{
+    .immediate_khr,
+};
+
+owner: *Device,
+swapchain: ?*SwapchainKHR,
+
+vtable: *const VTable,
+
+pub const VTable = struct {
+    destroy: *const fn (*Self, std.mem.Allocator) void,
+    getCapabilities: *const fn (*const Self, *vk.SurfaceCapabilitiesKHR) VkError!void,
+    attachImage: *const fn (*Self, std.mem.Allocator, *PresentImage) VkError!void,
+    detachImage: *const fn (*Self, std.mem.Allocator, *PresentImage) VkError!void,
+    presentImage: *const fn (*Self, std.mem.Allocator, *PresentImage) VkError!void,
+};
+
+pub fn init(device: *Device, allocator: std.mem.Allocator) VkError!Self {
+    _ = allocator;
+    return .{
+        .owner = device,
+        .swapchain = null,
+        .vtable = undefined,
+    };
+}
+
+pub inline fn destroy(self: *Self, allocator: std.mem.Allocator) void {
+    self.vtable.destroy(self, allocator);
+}
+
+pub fn getCapabilities(self: *const Self) VkError!vk.SurfaceCapabilitiesKHR {
+    var capabilities: vk.SurfaceCapabilitiesKHR = .{
+        .min_image_count = 1,
+        .max_image_count = 0,
+        .current_extent = .{ .width = std.math.maxInt(u32), .height = std.math.maxInt(u32) },
+        .min_image_extent = .{ .width = 1, .height = 1 },
+        .max_image_extent = .{ .width = std.math.maxInt(u32), .height = std.math.maxInt(u32) },
+        .max_image_array_layers = 1,
+        .supported_transforms = .{ .identity_bit_khr = true },
+        .current_transform = .{ .identity_bit_khr = true },
+        .supported_composite_alpha = .{ .opaque_bit_khr = true },
+        .supported_usage_flags = .{
+            .color_attachment_bit = true,
+            .input_attachment_bit = true,
+            .transfer_src_bit = true,
+            .transfer_dst_bit = true,
+            .sampled_bit = true,
+            .storage_bit = true,
+        },
+    };
+
+    try self.vtable.getCapabilities(self, &capabilities);
+    return capabilities;
+}
+
+pub inline fn attachImage(self: *Self, allocator: std.mem.Allocator, image: *PresentImage) VkError!void {
+    try self.vtable.attachImage(self, allocator, image);
+}
+
+pub inline fn detachImage(self: *Self, allocator: std.mem.Allocator, image: *PresentImage) VkError!void {
+    try self.vtable.detachImage(self, allocator, image);
+}
+
+pub inline fn presentImage(self: *Self, allocator: std.mem.Allocator, image: *PresentImage) VkError!void {
+    try self.vtable.presentImage(self, allocator, image);
+}
+
+pub inline fn getFormats() []vk.SurfaceFormatKHR {
+    return formats;
+}
+
+pub inline fn getPresentModes() []vk.PresentModeKHR {
+    return present_modes;
+}

src/vulkan/wsi/SwapchainKHR.zig

@@ -1,12 +1,13 @@
 const std = @import("std");
 const vk = @import("vulkan");
-const lib = @import("lib.zig");
+const lib = @import("../lib.zig");
 
 const VkError = @import("../error_set.zig").VkError;
 
 const Device = @import("../Device.zig");
 const SurfaceKHR = @import("SurfaceKHR.zig");
 const PresentImage = @import("PresentImage.zig");
+const Image = @import("../Image.zig");
 
 const Self = @This();
 pub const ObjectType: vk.ObjectType = .swapchain_khr;
@@ -25,7 +26,7 @@ pub fn create(device: *Device, allocator: std.mem.Allocator, info: *const vk.Swa
     }
 
     for (images) |*image| {
-        image.* = try .init(device, allocator, .{
+        image.* = try .init(device, allocator, &.{
             .format = info.image_format,
             .image_type = .@"2d",
             .extent = .{
@@ -35,7 +36,7 @@ pub fn create(device: *Device, allocator: std.mem.Allocator, info: *const vk.Swa
             },
             .mip_levels = 1,
             .array_layers = info.image_array_layers,
-            .samples = .@"1_bit",
+            .samples = .{ .@"1_bit" = true },
             .tiling = .optimal,
             .usage = info.image_usage,
             .sharing_mode = info.image_sharing_mode,
@@ -47,7 +48,19 @@ pub fn create(device: *Device, allocator: std.mem.Allocator, info: *const vk.Swa
 
     self.* = .{
         .owner = device,
+        .surface = undefined,
         .images = images,
     };
     return self;
 }
+
+pub fn getImage(self: *const Self, index: usize) VkError!*Image {
+    return if (index < self.images.len) self.images[index].image else VkError.Incomplete;
+}
+
+pub fn destroy(self: *Self, allocator: std.mem.Allocator) void {
+    for (self.images) |*image| {
+        image.deinit(allocator);
+    }
+    allocator.destroy(self);
+}

src/vulkan/wsi/WaylandSurfaceKHR.zig

@@ -0,0 +1,104 @@
+const std = @import("std");
+const vk = @import("vulkan");
+
+const lib = @import("../lib.zig");
+const wayland = @import("clients/wayland.zig");
+const PresentImage = @import("PresentImage.zig");
+
+const VkError = @import("../error_set.zig").VkError;
+const Device = @import("../Device.zig");
+
+const Self = @This();
+pub const Interface = @import("SurfaceKHR.zig");
+
+const WaylandImage = struct {
+    buffer: *wayland.wl_buffer,
+    data: []u8,
+};
+
+fn wlRegistryHandleGlobal(data: *anyopaque, registry: *wayland.wl_registry, name: c_uint, interface: [*:0]const u8, _: c_uint) callconv(.c) void {
+    const pshm: **wayland.wl_shm = @ptrCast(@alignCast(data));
+    if (std.mem.eql(u8, std.mem.span(interface), "wl_shm")) {
+        if (wayland.wl_registry_bind(registry, name, wayland.wl_shm_interface, 1)) |shm| {
+            pshm.* = @ptrCast(@alignCast(shm));
+        }
+    }
+}
+
+fn wlRegistryHandleGlobalRemove(_: *anyopaque, _: *wayland.wl_registry, _: c_uint) callconv(.c) void {}
+
+const wl_registry_listener: wayland.wl_registry_listener = .{
+    .global = wlRegistryHandleGlobal,
+    .global_remove = wlRegistryHandleGlobalRemove,
+};
+
+interface: Interface,
+display: *wayland.wl_display,
+surface: *wayland.wl_surface,
+shm: *wayland.wl_shm,
+image_map: std.AutoHashMapUnmanaged(*PresentImage, *WaylandImage),
+
+pub fn create(device: *Device, allocator: std.mem.Allocator, info: *const vk.WaylandSurfaceCreateInfoKHR) VkError!*Interface {
+    const self = allocator.create(Self) catch return VkError.OutOfHostMemory;
+    errdefer allocator.destroy(self);
+
+    try wayland.load();
+
+    var interface = try Interface.init(device, allocator);
+
+    interface.vtable = &.{
+        .destroy = destroy,
+        .getCapabilities = getCapabilities,
+        .attachImage = attachImage,
+        .detachImage = detachImage,
+        .presentImage = presentImage,
+    };
+
+    self.* = .{
+        .interface = interface,
+        .display = info.display,
+        .surface = info.surface,
+        .shm = undefined,
+        .image_map = .empty,
+    };
+
+    const registry = wayland.wl_display_get_registry(self.display) orelse return VkError.Unknown;
+    _ = wayland.wl_registry_add_listener(registry, &wl_registry_listener, @ptrCast(&self.shm));
+    _ = wayland.wl_display_dispatch(self.display);
+
+    return &self.interface;
+}
+
+pub fn destroy(interface: *Interface, allocator: std.mem.Allocator) void {
+    const self: *Self = @alignCast(@fieldParentPtr("interface", interface));
+    self.image_map.deinit(allocator);
+    allocator.destroy(self);
+    wayland.unload();
+}
+
+pub fn getCapabilities(interface: *const Interface, capabilities: *vk.SurfaceCapabilitiesKHR) VkError!void {
+    // No-op
+    _ = interface;
+    _ = capabilities;
+}
+
+pub fn attachImage(interface: *Interface, allocator: std.mem.Allocator, image: *PresentImage) VkError!void {
+    const self: *Self = @alignCast(@fieldParentPtr("interface", interface));
+    _ = self;
+    _ = image;
+    _ = allocator;
+}
+
+pub fn detachImage(interface: *Interface, allocator: std.mem.Allocator, image: *PresentImage) VkError!void {
+    const self: *Self = @alignCast(@fieldParentPtr("interface", interface));
+    _ = self;
+    _ = image;
+    _ = allocator;
+}
+
+pub fn presentImage(interface: *Interface, allocator: std.mem.Allocator, image: *PresentImage) VkError!void {
+    const self: *Self = @alignCast(@fieldParentPtr("interface", interface));
+    _ = self;
+    _ = image;
+    _ = allocator;
+}

src/vulkan/wsi/clients/wayland.zig

@@ -0,0 +1,73 @@
+const std = @import("std");
+const vk = @import("vulkan");
+const lib = @import("../../lib.zig");
+
+const VkError = lib.VkError;
+
+pub const wl_registry_listener = extern struct {
+    global: *const fn (*anyopaque, *wl_registry, c_uint, [*:0]const u8, c_uint) callconv(.c) void,
+    global_remove: *const fn (*anyopaque, *wl_registry, c_uint) callconv(.c) void,
+};
+
+pub const wl_buffer = opaque {};
+pub const wl_callback = opaque {};
+pub const wl_display = vk.wl_display;
+pub const wl_interface = opaque {};
+pub const wl_registry = opaque {};
+pub const wl_shm = opaque {};
+pub const wl_shm_pool = opaque {};
+pub const wl_surface = vk.wl_surface;
+
+pub var wl_display_dispatch: *const fn (d: *wl_display) callconv(.c) c_int = undefined;
+pub var wl_display_get_registry: *const fn (d: *wl_display) callconv(.c) ?*wl_registry = undefined;
+pub var wl_display_roundtrip: *const fn (d: *wl_display) callconv(.c) c_int = undefined;
+pub var wl_display_sync: *const fn (d: *wl_display) callconv(.c) ?*wl_callback = undefined;
+pub var wl_registry_add_listener: *const fn (r: *wl_registry, l: *const wl_registry_listener, data: *anyopaque) callconv(.c) c_int = undefined;
+pub var wl_registry_bind: *const fn (r: *wl_registry, name: u32, i: *const wl_interface, version: u32) callconv(.c) ?*anyopaque = undefined;
+pub var wl_buffer_destroy: *const fn (b: *wl_buffer) callconv(.c) void = undefined;
+pub var wl_shm_create_pool: *const fn (shm: *wl_shm, fd: i32, size: i32) callconv(.c) ?*wl_shm_pool = undefined;
+pub var wl_shm_pool_create_buffer: *const fn (p: *wl_shm_pool, offset: i32, width: i32, height: i32, stride: i32, format: u32) callconv(.c) ?*wl_buffer = undefined;
+pub var wl_shm_pool_destroy: *const fn (p: *wl_shm_pool) callconv(.c) void = undefined;
+pub var wl_surface_attach: *const fn (s: *wl_surface, b: *wl_buffer, x: i32, y: i32) callconv(.c) void = undefined;
+pub var wl_surface_damage: *const fn (s: *wl_surface, x: i32, y: i32, width: i32, height: i32) callconv(.c) void = undefined;
+pub var wl_surface_commit: *const fn (s: *wl_surface) callconv(.c) void = undefined;
+
+pub var wl_shm_interface: *wl_interface = undefined;
+
+pub var module: std.DynLib = undefined;
+
+pub var ref_count = std.atomic.Value(usize).init(0);
+
+pub fn load() VkError!void {
+    if (ref_count.load(.monotonic) != 0)
+        return;
+
+    module = std.DynLib.open("libwayland-client.so.0") catch return VkError.Unknown;
+    errdefer module.close();
+
+    // zig fmt: off
+    wl_display_dispatch       = module.lookup(@TypeOf(wl_display_dispatch),       "wl_display_dispatch"       ) orelse return VkError.Unknown;
+    wl_display_get_registry   = module.lookup(@TypeOf(wl_display_get_registry),   "wl_display_get_registry"   ) orelse return VkError.Unknown;
+    wl_display_roundtrip      = module.lookup(@TypeOf(wl_display_roundtrip),      "wl_display_roundtrip"      ) orelse return VkError.Unknown;
+    wl_display_sync           = module.lookup(@TypeOf(wl_display_sync),           "wl_display_sync"           ) orelse return VkError.Unknown;
+    wl_registry_add_listener  = module.lookup(@TypeOf(wl_registry_add_listener),  "wl_registry_add_listener"  ) orelse return VkError.Unknown;
+    wl_registry_bind          = module.lookup(@TypeOf(wl_registry_bind),          "wl_registry_bind"          ) orelse return VkError.Unknown;
+    wl_buffer_destroy         = module.lookup(@TypeOf(wl_buffer_destroy),         "wl_buffer_destroy"         ) orelse return VkError.Unknown;
+    wl_shm_create_pool        = module.lookup(@TypeOf(wl_shm_create_pool),        "wl_shm_create_pool"        ) orelse return VkError.Unknown;
+    wl_shm_pool_create_buffer = module.lookup(@TypeOf(wl_shm_pool_create_buffer), "wl_shm_pool_create_buffer" ) orelse return VkError.Unknown;
+    wl_shm_pool_destroy       = module.lookup(@TypeOf(wl_shm_pool_destroy),       "wl_shm_pool_destroy"       ) orelse return VkError.Unknown;
+    wl_surface_attach         = module.lookup(@TypeOf(wl_surface_attach),         "wl_surface_attach"         ) orelse return VkError.Unknown;
+    wl_surface_damage         = module.lookup(@TypeOf(wl_surface_damage),         "wl_surface_damage"         ) orelse return VkError.Unknown;
+    wl_surface_commit         = module.lookup(@TypeOf(wl_surface_commit),         "wl_surface_commit"         ) orelse return VkError.Unknown;
+    // zig fmt: on
+
+    wl_shm_interface = module.lookup(*wl_interface, "wl_shm_interface") orelse return VkError.Unknown;
+
+    _ = ref_count.fetchAdd(1, .monotonic);
+}
+
+pub fn unload() void {
+    if (ref_count.fetchSub(1, .release) == 1) {
+        module.close();
+    }
+}