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Description: Support platforms without 64-bit atomic types
As explained in https://doc.rust-lang.org/std/sync/atomic/#portability,
some platforms don't have 64-bit atomic types. As a result of
`smallvec` being used by `pydantic-core`, this crate is involved in some
dependency chains in Debian where we currently support the armel and
powerpc architectures, neither of which have these types.
.
Since the `malloc_size_of_is_0!` macro just implements a trait on the
types it's called with, it should be fine to skip types that don't exist
on the target platform.
.
Bumps MSRV to 1.60 for `#[cfg(target_has_atomic = "...")]`.
Author: Colin Watson <cjwatson@debian.org>
Forwarded: https://github.com/servo/malloc_size_of/pull/12
Last-Update: 2025-08-22
---
This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
Index: b/Cargo.toml
===================================================================
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@
[package]
edition = "2021"
-rust-version = "1.56"
+rust-version = "1.60"
name = "malloc_size_of"
version = "0.1.1"
authors = ["The Servo Project Developers"]
Index: b/src/impls.rs
===================================================================
--- a/src/impls.rs
+++ b/src/impls.rs
@@ -18,8 +18,10 @@
use core::num::{NonZeroU128, NonZeroU16, NonZeroU32, NonZeroU64, NonZeroU8, NonZeroUsize};
use core::ops::{Range, RangeFrom, RangeInclusive, RangeTo};
use core::sync::atomic::AtomicBool;
-use core::sync::atomic::{AtomicI16, AtomicI32, AtomicI64, AtomicI8, AtomicIsize};
-use core::sync::atomic::{AtomicU16, AtomicU32, AtomicU64, AtomicU8, AtomicUsize};
+use core::sync::atomic::{AtomicI16, AtomicI32, AtomicI8, AtomicIsize};
+#[cfg(target_has_atomic = "64")]
+use core::sync::atomic::{AtomicI64, AtomicU64};
+use core::sync::atomic::{AtomicU16, AtomicU32, AtomicU8, AtomicUsize};
use alloc::borrow::{Cow, ToOwned};
use alloc::boxed::Box;
@@ -75,8 +77,11 @@
malloc_size_of_is_0!(f32, f64);
malloc_size_of_is_0!(AtomicBool);
-malloc_size_of_is_0!(AtomicU8, AtomicU16, AtomicU32, AtomicU64, AtomicUsize);
-malloc_size_of_is_0!(AtomicI8, AtomicI16, AtomicI32, AtomicI64, AtomicIsize);
+malloc_size_of_is_0!(AtomicU8, AtomicU16, AtomicU32, AtomicUsize);
+malloc_size_of_is_0!(AtomicI8, AtomicI16, AtomicI32, AtomicIsize);
+#[cfg(target_has_atomic = "64")]
+malloc_size_of_is_0!(AtomicU64, AtomicI64);
+
malloc_size_of_is_0!(
NonZeroU8,
NonZeroU16,
|
