adding device memory base

src/vulkan/DeviceMemory.zig

@@ -0,0 +1,37 @@
+const std = @import("std");
+const vk = @import("vulkan");
+
+const VkError = @import("error_set.zig").VkError;
+const Device = @import("Device.zig");
+
+const Self = @This();
+pub const ObjectType: vk.ObjectType = .device_memory;
+
+owner: *const Device,
+size: vk.DeviceSize,
+memory_type_index: u32,
+is_mapped: bool,
+
+vtable: *const VTable,
+
+pub const VTable = struct {
+    map: *const fn (*Self, vk.DeviceSize, vk.DeviceSize) VkError!?*anyopaque,
+    unmap: *const fn (*Self) void,
+};
+
+pub fn init(device: *const Device, size: vk.DeviceSize, memory_type_index: u32) VkError!Self {
+    return .{
+        .owner = device,
+        .size = size,
+        .memory_type_index = memory_type_index,
+        .is_mapped = false,
+    };
+}
+
+pub inline fn map(self: *Self, offset: vk.DeviceSize, size: vk.DeviceSize) VkError!?*anyopaque {
+    return self.vtable.map(self, offset, size);
+}
+
+pub inline fn unmap(self: *Self) void {
+    return self.vtable.unmap(self);
+}