xref: /linux/rust/kernel/sync/atomic/predefine.rs (revision d132054360baf0d127a463bbf853e43dd6eb0dd9)

// SPDX-License-Identifier: GPL-2.0

//! Pre-defined atomic types

// SAFETY: `i32` has the same size and alignment with itself, and is round-trip transmutable to
// itself.
unsafe impl super::AtomicType for i32 {
    type Repr = i32;
}

// SAFETY: The wrapping add result of two `i32`s is a valid `i32`.
unsafe impl super::AtomicAdd<i32> for i32 {
    fn rhs_into_delta(rhs: i32) -> i32 {
        rhs
    }
}

// SAFETY: `i64` has the same size and alignment with itself, and is round-trip transmutable to
// itself.
unsafe impl super::AtomicType for i64 {
    type Repr = i64;
}

// SAFETY: The wrapping add result of two `i64`s is a valid `i64`.
unsafe impl super::AtomicAdd<i64> for i64 {
    fn rhs_into_delta(rhs: i64) -> i64 {
        rhs
    }
}