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Subject [GitHub] [incubator-tvm] jroesch commented on a change in pull request #5526: [Rust] Add first stage of updating and rewriting Rust bindings.
Date Fri, 08 May 2020 18:19:27 GMT

jroesch commented on a change in pull request #5526:
URL: https://github.com/apache/incubator-tvm/pull/5526#discussion_r422295900



##########
File path: rust/tvm-sys/src/context.rs
##########
@@ -0,0 +1,285 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+//! Provides [`Context`] and related device queries.
+//!
+//! Create a new context for device type and device id.
+//!
+//! # Example
+//!
+//! ```
+//! # use tvm_sys::{DeviceType, Context};
+//! let cpu = DeviceType::from("cpu");
+//! let ctx = Context::new(cpu , 0);
+//! let cpu0 = Context::cpu(0);
+//! assert_eq!(ctx, cpu0);
+//! ```
+//!
+//! Or from a supported device name.
+//!
+//! ```
+//! use tvm_sys::Context;
+//! let cpu0 = Context::from("cpu");
+//! println!("{}", cpu0);
+//! ```
+
+use std::convert::TryFrom;
+use std::str::FromStr;
+use std::fmt::{self, Display, Formatter};
+
+use crate::ffi::{self, *};
+use crate::packed_func::{ArgValue, RetValue};
+
+use thiserror::Error;
+use anyhow::Result;
+use enumn::N;
+
+/// Device type represents the set of devices supported by
+/// [TVM](https://github.com/apache/incubator-tvm).
+///
+/// ## Example
+///
+/// ```
+/// use tvm_sys::DeviceType;
+/// let cpu = DeviceType::from("cpu");
+/// println!("device is: {}", cpu);
+///```
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, N)]
+#[repr(i64)]
+pub enum DeviceType {
+    CPU = 1,
+    GPU,
+    CPUPinned,
+    OpenCL,
+    Vulkan,
+    Metal,
+    VPI,
+    ROCM,
+    ExtDev,
+}

Review comment:
       The `tvm-sys` stands alone from all other crates right now. The goal is to fix the
above issues in the higher level crates by wrapping standard low-level constructs with better
designs and then incrementally bubbling up to other crates, see my other open PR for more
examples. 




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