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Add a comment for UserMode

This commit is contained in:
Tate, Hongliang Tian 2024-08-14 11:34:00 +08:00
parent b6e4b36a51
commit 6df0a3073c
1 changed files with 3 additions and 1 deletions
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4
ostd/src/user.rs
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@ -109,8 +109,10 @@ pub struct UserMode<'a> {
context: UserContext, context: UserContext,
} }
// An instance of `UserMode` is bound to the current task. So it cannot be [`Send`]. // An instance of `UserMode` is bound to the current task. So it must not be sent to other tasks.
impl<'a> !Send for UserMode<'a> {} impl<'a> !Send for UserMode<'a> {}
// Note that implementing `!Sync` is unnecessary
// because entering the user space via `UserMode` requires taking a mutable reference.
impl<'a> UserMode<'a> { impl<'a> UserMode<'a> {
/// Creates a new `UserMode`. /// Creates a new `UserMode`.