From 94b49a2d60d4612219d3509ea6fb47cf5bedc0eb Mon Sep 17 00:00:00 2001
From: Josh Triplett <josh@joshtriplett.org>
Date: Fri, 29 Apr 2022 10:11:02 -0700
Subject: [PATCH] Use `std::thread::available_parallelism` in place of num_cpus
 (#199)

---
 Cargo.toml     | 1 -
 rust-toolchain | 2 +-
 src/lib.rs     | 2 +-
 3 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 7907254..0ef6208 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,7 +18,6 @@ raw-api = []
 send_guard = ["parking_lot/send_guard"]
 
 [dependencies]
-num_cpus = "1.13.1"
 parking_lot = "0.12.0"
 hashbrown = "0.11.2"
 serde = { version = "1.0.136", optional = true, features = ["derive"] }
diff --git a/rust-toolchain b/rust-toolchain
index e4528cb..62d03d5 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1,4 +1,4 @@
 [toolchain]
-channel = "stable-2020-12-31"
+channel = "1.59"
 components = [ "rustfmt", "clippy" ]
 profile = "minimal"
diff --git a/src/lib.rs b/src/lib.rs
index 836b70c..53a46d2 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -46,7 +46,7 @@ cfg_if! {
 pub(crate) type HashMap<K, V, S> = hashbrown::HashMap<K, SharedValue<V>, S>;
 
 fn default_shard_amount() -> usize {
-    (num_cpus::get() * 4).next_power_of_two()
+    (std::thread::available_parallelism().map_or(1, usize::from) * 4).next_power_of_two()
 }
 
 fn ncb(shard_amount: usize) -> usize {