Refactor project structure

kernel/libs/comp-sys/controlled/src/lib.rs

@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: MPL-2.0
+
+//! This crate defines two attribute macros `controlled` and `uncontrolled`.
+//! This two macros are attached to functions or static variables to enable crate level access control.
+//! To use these two macros, a crate must at first registers a tool named `component_access_control`,
+//! because controlled used tool attribute internally.
+//!
+//! Below is a simple usage example.
+//! ```rust
+//! // crate-level tool registration
+//! #![feature(register_tool)]
+//! #![register_tool(component_access_control)]
+//!
+//! #[macro_use]
+//! extern crate controlled; // import this crate
+//!
+//! #[controlled]
+//! pub static FOO: usize = 0;
+//!
+//! #[uncontrolled]
+//! pub fn bar() {}
+//! ```
+use quote::quote;
+
+#[proc_macro_attribute]
+pub fn controlled(
+    attr: proc_macro::TokenStream,
+    item: proc_macro::TokenStream,
+) -> proc_macro::TokenStream {
+    let attr = attr.to_string();
+    if attr.len() != 0 {
+        panic!("controlled cannot accept inner tokens.")
+    }
+    let mut tokens: proc_macro::TokenStream = quote!(
+        #[component_access_control::controlled]
+    )
+    .into();
+    tokens.extend(item);
+    tokens
+}
+
+#[proc_macro_attribute]
+pub fn uncontrolled(
+    attr: proc_macro::TokenStream,
+    item: proc_macro::TokenStream,
+) -> proc_macro::TokenStream {
+    let attr = attr.to_string();
+    if attr.len() != 0 {
+        panic!("uncontrolled cannot accept inner tokens.")
+    }
+    let mut tokens: proc_macro::TokenStream = quote!(
+        #[component_access_control::uncontrolled]
+    )
+    .into();
+    tokens.extend(item);
+    tokens
+}