rust/kernel/sync/barrier.rs

Source file repositories/reference/linux-study-clean/rust/kernel/sync/barrier.rs

File Facts

System
Linux kernel
Corpus path
rust/kernel/sync/barrier.rs
Extension
.rs
Size
1621 bytes
Lines
62
Domain
Rust Kernel Layer
Bucket
Rust API Membrane
Inferred role
Rust Kernel Layer: implementation source
Status
source implementation candidate

Why This File Exists

Rust-side wrappers and abstractions around kernel C APIs, ownership contracts, allocation, synchronization, and module integration.

Dependency Surface

Detected Declarations

Annotated Snippet

pub fn smp_mb() {
    if cfg!(CONFIG_SMP) {
        // SAFETY: `smp_mb()` is safe to call.
        unsafe { bindings::smp_mb() };
    } else {
        barrier();
    }
}

/// A write-write memory barrier.
///
/// A barrier that prevents compiler and CPU from reordering memory write accesses across the
/// barrier.
#[inline(always)]
pub fn smp_wmb() {
    if cfg!(CONFIG_SMP) {
        // SAFETY: `smp_wmb()` is safe to call.
        unsafe { bindings::smp_wmb() };
    } else {
        barrier();
    }
}

/// A read-read memory barrier.
///
/// A barrier that prevents compiler and CPU from reordering memory read accesses across the
/// barrier.
#[inline(always)]
pub fn smp_rmb() {
    if cfg!(CONFIG_SMP) {
        // SAFETY: `smp_rmb()` is safe to call.
        unsafe { bindings::smp_rmb() };
    } else {
        barrier();
    }
}

Annotation

Implementation Notes