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#[cfg(target_arch = "x86")]
pub const CACHE_LINE_SIZE: usize = 64;
#[cfg(target_arch = "x86_64")]
pub const CACHE_LINE_SIZE: usize = 64;
#[cfg(target_arch = "mips")]
pub const CACHE_LINE_SIZE: usize = 32;
#[cfg(target_arch = "powerpc")]
pub const CACHE_LINE_SIZE: usize = 64;
#[cfg(target_arch = "powerpc64")]
pub const CACHE_LINE_SIZE: usize = 128;
#[cfg(target_arch = "arm")]
pub const CACHE_LINE_SIZE: usize = 32;
#[cfg(target_arch = "aarch64")]
pub const CACHE_LINE_SIZE: usize = 32;
#[cfg(target_arch = "s390x")]
pub const CACHE_LINE_SIZE: usize = 256;
#[cfg_attr(
any(
target_arch = "x86_64",
target_arch = "x86",
target_arch = "powerpc"
),
repr(align(64))
)]
#[cfg_attr(
any(
target_arch = "mips",
target_arch = "arm",
target_arch = "aarch64"
),
repr(align(32))
)]
#[cfg_attr(any(target_arch = "powerpc64"), repr(align(128)))]
#[cfg_attr(any(target_arch = "s390x"), repr(align(256)))]
pub struct CacheAligned<T: Sized>(pub T);
impl<T> CacheAligned<T> {
pub fn new(v: T) -> CacheAligned<T> {
CacheAligned { 0: v }
}
}
#[cfg(test)]
mod tests {
use super::{CacheAligned, CACHE_LINE_SIZE};
use std::mem::size_of;
#[test]
fn it_works() {
assert_eq!(size_of::<u8>(), 1);
assert_eq!(size_of::<CacheAligned<u8>>(), CACHE_LINE_SIZE);
}
struct ThreeLineStruct {
pub line_1: CacheAligned<u8>,
pub line_2: CacheAligned<u8>,
pub line_3: CacheAligned<u8>,
}
#[test]
fn it_is_three_lines() {
assert_eq!(size_of::<ThreeLineStruct>(), 3*CACHE_LINE_SIZE);
}
}