diff --git a/src/command/compute.rs b/src/command/compute.rs
index 044880348..df2f0c01a 100644
--- a/src/command/compute.rs
+++ b/src/command/compute.rs
@@ -1,5 +1,25 @@
 use hal;
 
+use {CommandBuffer, CommandBufferHandle, ComputePassHandle};
+
+
 pub struct ComputePass<B: hal::Backend> {
     raw: B::CommandBuffer,
 }
+
+pub extern "C"
+fn compute_pass_dispatch(
+    pass: ComputePassHandle, groups_x: u32, groups_y: u32, groups_z: u32
+) {
+    unimplemented!()
+}
+
+pub extern "C"
+fn compute_pass_end(pass: ComputePassHandle) -> CommandBufferHandle {
+    match pass.unbox() {
+        Some(pass) => CommandBufferHandle::new(CommandBuffer {
+            raw: pass.raw,
+        }),
+        None => CommandBufferHandle::null(),
+    }
+}
diff --git a/src/command/render.rs b/src/command/render.rs
index 701386a16..a6c1e19a5 100644
--- a/src/command/render.rs
+++ b/src/command/render.rs
@@ -1,6 +1,6 @@
 use hal;
 
-use {CommandBufferHandle, RenderPassHandle};
+use {CommandBuffer, CommandBufferHandle, RenderPassHandle};
 
 
 pub struct RenderPass<B: hal::Backend> {
@@ -23,5 +23,10 @@ fn render_pass_draw_indexed(
 
 pub extern "C"
 fn render_pass_end(pass: RenderPassHandle) -> CommandBufferHandle {
-    unimplemented!()
+    match pass.unbox() {
+        Some(pass) => CommandBufferHandle::new(CommandBuffer {
+            raw: pass.raw,
+        }),
+        None => CommandBufferHandle::null(),
+    }
 }
diff --git a/src/device.rs b/src/device.rs
index 90775deb2..646e6278a 100644
--- a/src/device.rs
+++ b/src/device.rs
@@ -1,4 +1,5 @@
 use hal::{self, Device as _Device};
+use memory;
 
 use {BufferHandle, CommandBufferHandle, DeviceHandle};
 
@@ -17,6 +18,7 @@ pub struct CommandBufferDescriptor {
 
 pub struct Device<B: hal::Backend> {
     pub gpu: hal::Gpu<B>,
+    pub memory_properties: hal::MemoryProperties,
 }
 
 pub struct Buffer<B: hal::Backend> {
diff --git a/src/instance.rs b/src/instance.rs
index 388d9f160..1616ef3ec 100644
--- a/src/instance.rs
+++ b/src/instance.rs
@@ -61,5 +61,6 @@ fn adapter_create_device(
     let gpu = adapter.physical_device.open(&[(queue_family, &[1f32])]).unwrap();
     DeviceHandle::new(Device {
         gpu,
+        memory_properties: adapter.physical_device.memory_properties(),
     })
 }
diff --git a/src/lib.rs b/src/lib.rs
index aed275dd4..48e943f16 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -5,6 +5,7 @@ extern crate gfx_backend_vulkan as back;
 extern crate gfx_backend_dx12 as back;
 #[cfg(feature = "gfx-backend-metal")]
 extern crate gfx_backend_metal as back;
+extern crate gfx_memory as memory;
 
 mod command;
 mod device;