18a16ad956
have 64-bit atomics by using a Mutex<u64> on 32-bit architectures. Currently the usage of atomics are only in functions that support tests and benchmarks.
39 lines
916 B
Rust
39 lines
916 B
Rust
pub(crate) use implementation::AtomicU64;
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#[cfg(target_pointer_width = "64")]
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mod implementation {
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use std::sync::atomic;
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pub(crate) struct AtomicU64(atomic::AtomicU64);
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impl AtomicU64 {
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pub(crate) const fn new(initial: u64) -> Self {
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Self(atomic::AtomicU64::new(initial))
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}
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pub(crate) fn fetch_add(&self, v: u64) -> u64 {
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self.0.fetch_add(v, atomic::Ordering::Relaxed)
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}
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}
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}
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#[cfg(not(target_pointer_width = "64"))]
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mod implementation {
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use parking_lot::{const_mutex, Mutex};
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pub(crate) struct AtomicU64(Mutex<u64>);
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impl AtomicU64 {
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pub(crate) const fn new(initial: u64) -> Self {
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Self(const_mutex(initial))
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}
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pub(crate) fn fetch_add(&self, v: u64) -> u64 {
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let mut lock = self.0.lock();
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let i = *lock;
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*lock = i + v;
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i
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}
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}
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}
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