adding base for Xeon Phi driver

src/phi/PhiDeviceMemory.zig

@@ -0,0 +1,60 @@
+const std = @import("std");
+const vk = @import("vulkan");
+const base = @import("base");
+const lib = @import("lib.zig");
+
+const PhiDevice = @import("PhiDevice.zig");
+
+const VkError = base.VkError;
+
+const Self = @This();
+pub const Interface = base.DeviceMemory;
+
+interface: Interface,
+
+pub fn create(device: *PhiDevice, allocator: std.mem.Allocator, size: vk.DeviceSize, memory_type_index: u32) VkError!*Self {
+    const self = allocator.create(Self) catch return VkError.OutOfHostMemory;
+    errdefer allocator.destroy(self);
+
+    var interface = try Interface.init(&device.interface, size, memory_type_index);
+
+    interface.vtable = &.{
+        .destroy = destroy,
+        .map = map,
+        .unmap = unmap,
+        .flushRange = flushRange,
+        .invalidateRange = invalidateRange,
+    };
+
+    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);
+}
+
+pub fn flushRange(interface: *Interface, offset: vk.DeviceSize, size: vk.DeviceSize) VkError!void {
+    _ = interface;
+    _ = offset;
+    _ = size;
+}
+
+pub fn invalidateRange(interface: *Interface, offset: vk.DeviceSize, size: vk.DeviceSize) VkError!void {
+    _ = interface;
+    _ = offset;
+    _ = size;
+}
+
+pub fn map(interface: *Interface, offset: vk.DeviceSize, size: vk.DeviceSize) VkError![]u8 {
+    const self: *Self = @alignCast(@fieldParentPtr("interface", interface));
+    _ = self;
+    _ = offset;
+    _ = size;
+    return VkError.Unknown;
+}
+
+pub fn unmap(_: *Interface) void {}