Vendor dependencies for 0.3.0 release

vendor/metal/examples/fence/main.rs

@@ -0,0 +1,30 @@
+// Copyright 2020 GFX developers
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use metal::*;
+
+fn main() {
+    let device = Device::system_default().expect("No device found");
+
+    let command_queue = device.new_command_queue();
+    let command_buffer = command_queue.new_command_buffer();
+
+    let fence = device.new_fence();
+
+    let blit_encoder = command_buffer.new_blit_command_encoder();
+    blit_encoder.update_fence(&fence);
+    blit_encoder.end_encoding();
+
+    let compute_encoder = command_buffer.new_compute_command_encoder();
+    compute_encoder.wait_for_fence(&fence);
+    compute_encoder.end_encoding();
+
+    command_buffer.commit();
+    command_buffer.wait_until_completed();
+
+    println!("Done");
+}