jroesch commented on a change in pull request #5526: URL: https://github.com/apache/incubator-tvm/pull/5526#discussion_r420950375
########## File path: rust/tvm-sys/src/context.rs ########## @@ -0,0 +1,293 @@ +/* + * 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::{TVMDeviceType, Context}; +//! let cpu = TVMDeviceType::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 crate::ffi::{self, *}; +use crate::packed_func::{ArgValue, RetValue}; + +use std::convert::TryFrom; +use std::str::FromStr; +use thiserror::Error; + +use std::fmt::{self, Display, Formatter}; + +use anyhow::Result; + +/// Device type can be from a supported device name. See the supported devices +/// in [TVM](https://github.com/apache/incubator-tvm). +/// +/// ## Example +/// +/// ``` +/// use tvm_sys::TVMDeviceType; +/// let cpu = TVMDeviceType::from("cpu"); +/// println!("device is: {}", cpu); +///``` + +#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] +pub struct TVMDeviceType(pub i64); + +impl Default for TVMDeviceType { + /// default device is cpu. + fn default() -> Self { + TVMDeviceType(1) + } +} + +impl From<TVMDeviceType> for ffi::DLDeviceType { + fn from(device_type: TVMDeviceType) -> Self { + match device_type.0 { + 1 => ffi::DLDeviceType_kDLCPU, + 2 => ffi::DLDeviceType_kDLGPU, + 3 => ffi::DLDeviceType_kDLCPUPinned, + 4 => ffi::DLDeviceType_kDLOpenCL, + 7 => ffi::DLDeviceType_kDLVulkan, + 8 => ffi::DLDeviceType_kDLMetal, + 9 => ffi::DLDeviceType_kDLVPI, + 10 => ffi::DLDeviceType_kDLROCM, + 12 => ffi::DLDeviceType_kDLExtDev, + _ => panic!("device type not found!"), + } + } +} + +impl From<ffi::DLDeviceType> for TVMDeviceType { + fn from(device_type: ffi::DLDeviceType) -> Self { + match device_type { + ffi::DLDeviceType_kDLCPU => TVMDeviceType(1), Review comment: Yeah sounds good, another example of leaving existing code alone and rewriting everything in one go :) ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
