reworking vulkan allocator

src/soft/SoftCommandBuffer.zig

@@ -0,0 +1,32 @@
+const std = @import("std");
+const vk = @import("vulkan");
+const base = @import("base");
+
+const VkError = base.VkError;
+const Device = base.Device;
+
+const Self = @This();
+pub const Interface = base.CommandBuffer;
+
+interface: Interface,
+
+pub fn create(device: *base.Device, allocator: std.mem.Allocator, info: *const vk.CommandBufferAllocateInfo) VkError!*Self {
+    const self = allocator.create(Self) catch return VkError.OutOfHostMemory;
+    errdefer allocator.destroy(self);
+
+    var interface = try Interface.init(device, allocator, info);
+
+    interface.vtable = &.{
+        .destroy = destroy,
+    };
+
+    self.* = .{
+        .interface = interface,
+    };
+    return self;
+}
+
+pub fn destroy(interface: *Interface, allocator: std.mem.Allocator) void {
+    const self: *Self = @alignCast(@fieldParentPtr("interface", interface));
+    allocator.destroy(self);
+}

src/soft/lib.zig

@@ -7,6 +7,7 @@ pub const SoftDevice = @import("SoftDevice.zig");
 pub const SoftPhysicalDevice = @import("SoftPhysicalDevice.zig");
 pub const SoftQueue = @import("SoftQueue.zig");
 
+pub const SoftCommandBuffer = @import("SoftCommandBuffer.zig");
 pub const SoftCommandPool = @import("SoftCommandPool.zig");
 pub const SoftDeviceMemory = @import("SoftDeviceMemory.zig");
 pub const SoftFence = @import("SoftFence.zig");