MSRV 1.60: Conditionally import lasy.rs module

This simplifies lib.rs and allows for our testing code to be less
convoluted.

The MSRV for rand 0.9 is 1.61 and Debian stable is 1.63, so this is a
fine MSRV bump.

Signed-off-by: Joe Richey <[email protected]>

Author: josephlr

.clippy.toml

@@ -1 +1 @@
-msrv = "1.57"
+msrv = "1.60"

.github/workflows/tests.yml

@@ -44,7 +44,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-22.04, windows-2022]
-        toolchain: [nightly, beta, stable, 1.57]
+        toolchain: [nightly, beta, stable, "1.60"]
         # Only Test macOS on stable to reduce macOS CI jobs
         include:
           # x86_64-apple-darwin.

Cargo.toml

@@ -2,7 +2,7 @@
 name = "getrandom"
 version = "0.2.15" # Also update html_root_url in lib.rs when bumping this
 edition = "2021"
-rust-version = "1.57" # Sync .clippy.toml, tests.yml, and README.md.
+rust-version = "1.60" # Sync .clippy.toml, tests.yml, and README.md.
 authors = ["The Rand Project Developers"]
 license = "MIT OR Apache-2.0"
 description = "A small cross-platform library for retrieving random data from system source"

README.md

@@ -52,7 +52,7 @@ crate features, WASM support and Custom RNGs see the
 
 ## Minimum Supported Rust Version
 
-This crate requires Rust 1.57.0 or later.
+This crate requires Rust 1.60.0 or later.
 
 ## Platform Support
 

src/lazy.rs

@@ -1,3 +1,5 @@
+//! Helpers built around pointer-sized atomics.
+#![cfg(target_has_atomic = "ptr")]
 #![allow(dead_code)]
 use core::{
     ffi::c_void,

src/lib.rs

@@ -216,6 +216,7 @@ use crate::util::{slice_as_uninit_mut, slice_assume_init_mut};
 use core::mem::MaybeUninit;
 
 mod error;
+mod lazy;
 mod util;
 // To prevent a breaking change when targets are added, we always export the
 // register_custom_getrandom macro, so old Custom RNG crates continue to build.
@@ -298,7 +299,6 @@ cfg_if! {
     ))] {
         mod util_libc;
         mod use_file;
-        mod lazy;
         mod linux_android;
         #[path = "linux_android_with_fallback.rs"] mod imp;
     } else if #[cfg(any(target_os = "android", target_os = "linux"))] {
@@ -309,7 +309,6 @@ cfg_if! {
         #[path = "solaris.rs"] mod imp;
     } else if #[cfg(target_os = "netbsd")] {
         mod util_libc;
-        mod lazy;
         #[path = "netbsd.rs"] mod imp;
     } else if #[cfg(target_os = "fuchsia")] {
         #[path = "fuchsia.rs"] mod imp;
@@ -331,11 +330,9 @@ cfg_if! {
     } else if #[cfg(windows)] {
         #[path = "windows.rs"] mod imp;
     } else if #[cfg(all(target_arch = "x86_64", target_env = "sgx"))] {
-        mod lazy;
         #[path = "rdrand.rs"] mod imp;
     } else if #[cfg(all(feature = "rdrand",
                         any(target_arch = "x86_64", target_arch = "x86")))] {
-        mod lazy;
         #[path = "rdrand.rs"] mod imp;
     } else if #[cfg(all(feature = "js",
                         any(target_arch = "wasm32", target_arch = "wasm64"),