Merge pull request #23 from Tim-Zhang/add-trait-bound-for-hierarchy

Add trait bound for hierarchy

Author: Tim-Zhang

Cargo.toml

@@ -5,7 +5,7 @@ repository = "https://github.com/kata-containers/cgroups-rs"
 keywords = ["linux", "cgroup", "containers", "isolation"]
 categories = ["os", "api-bindings", "os::unix-apis"]
 license = "MIT OR Apache-2.0"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["The Kata Containers community <[email protected]>", "Levente Kurusa <[email protected]>", "Sam Wilson <[email protected]>"]
 edition = "2018"
 

src/lib.rs

@@ -386,7 +386,7 @@ pub trait ControllIdentifier {
 
 /// Control group hierarchy (right now, only V1 is supported, but in the future Unified will be
 /// implemented as well).
-pub trait Hierarchy: std::fmt::Debug + Send {
+pub trait Hierarchy: std::fmt::Debug + Send + Sync {
     /// Returns what subsystems are supported by the hierarchy.
     fn subsystems(&self) -> Vec<Subsystem>;