Rename std::thread::available_conccurrency to std::thread::available_parallelism

library/std/src/sys/hermit/thread.rs

@@ -97,7 +97,7 @@ impl Thread {
     }
 }
 
-pub fn available_concurrency() -> io::Result<NonZeroUsize> {
+pub fn available_parallelism() -> io::Result<NonZeroUsize> {
     unsupported()
 }
 

library/std/src/sys/sgx/thread.rs

@@ -137,7 +137,7 @@ impl Thread {
     }
 }
 
-pub fn available_concurrency() -> io::Result<NonZeroUsize> {
+pub fn available_parallelism() -> io::Result<NonZeroUsize> {
     unsupported()
 }
 

library/std/src/sys/unix/thread.rs

@@ -263,7 +263,7 @@ impl Drop for Thread {
     }
 }
 
-pub fn available_concurrency() -> io::Result<NonZeroUsize> {
+pub fn available_parallelism() -> io::Result<NonZeroUsize> {
     cfg_if::cfg_if! {
         if #[cfg(any(
             target_os = "android",

library/std/src/sys/unsupported/thread.rs

@@ -31,7 +31,7 @@ impl Thread {
     }
 }
 
-pub fn available_concurrency() -> io::Result<NonZeroUsize> {
+pub fn available_parallelism() -> io::Result<NonZeroUsize> {
     unsupported()
 }
 

library/std/src/sys/wasi/thread.rs

@@ -64,7 +64,7 @@ impl Thread {
     }
 }
 
-pub fn available_concurrency() -> io::Result<NonZeroUsize> {
+pub fn available_parallelism() -> io::Result<NonZeroUsize> {
     unsupported()
 }
 

library/std/src/sys/wasm/atomics/thread.rs

@@ -40,7 +40,7 @@ impl Thread {
     pub fn join(self) {}
 }
 
-pub fn available_concurrency() -> io::Result<NonZeroUsize> {
+pub fn available_parallelism() -> io::Result<NonZeroUsize> {
     unsupported()
 }
 

library/std/src/sys/windows/thread.rs

@@ -100,7 +100,7 @@ impl Thread {
     }
 }
 
-pub fn available_concurrency() -> io::Result<NonZeroUsize> {
+pub fn available_parallelism() -> io::Result<NonZeroUsize> {
     let res = unsafe {
         let mut sysinfo: c::SYSTEM_INFO = crate::mem::zeroed();
         c::GetSystemInfo(&mut sysinfo);

library/std/src/thread/mod.rs

@@ -1455,12 +1455,14 @@ fn _assert_sync_and_send() {
 ///
 /// ```
 /// # #![allow(dead_code)]
-/// #![feature(available_concurrency)]
+/// #![feature(available_parallelism)]
 /// use std::thread;
 ///
-/// let count = thread::available_concurrency().map(|n| n.get()).unwrap_or(1);
+/// let count = thread::available_parallelism().map(|n| n.get()).unwrap_or(1);
 /// ```
-#[unstable(feature = "available_concurrency", issue = "74479")]
-pub fn available_concurrency() -> io::Result<NonZeroUsize> {
-    imp::available_concurrency()
+#[doc(alias = "hardware_concurrency")] // Alias for C++ `std::thread::hardware_concurrency`.
+#[doc(alias = "available_concurrency")] // Alias for a name we gave this API on unstable.
+#[unstable(feature = "available_parallelism", issue = "74479")]
+pub fn available_parallelism() -> io::Result<NonZeroUsize> {
+    imp::available_parallelism()
 }

library/test/src/helpers/concurrency.rs

@@ -9,6 +9,6 @@ pub fn get_concurrency() -> usize {
             _ => panic!("RUST_TEST_THREADS is `{}`, should be a positive integer.", value),
         }
     } else {
-        thread::available_concurrency().map(|n| n.get()).unwrap_or(1)
+        thread::available_parallelism().map(|n| n.get()).unwrap_or(1)
     }
 }

library/test/src/lib.rs

@@ -23,7 +23,7 @@
 #![feature(libc)]
 #![feature(rustc_private)]
 #![feature(nll)]
-#![feature(available_concurrency)]
+#![feature(available_parallelism)]
 #![feature(bench_black_box)]
 #![feature(internal_output_capture)]
 #![feature(panic_unwind)]

src/doc/rustc/src/tests/index.md

@@ -161,7 +161,7 @@ The following options affect how tests are executed.
 
 Sets the number of threads to use for running tests in parallel. By default,
 uses the amount of concurrency available on the hardware as indicated by
-[`available_concurrency`].
+[`available_parallelism`].
 
 This can also be specified with the `RUST_TEST_THREADS` environment variable.
 
@@ -265,7 +265,7 @@ Experimental support for using custom test harnesses is available on the
 
 [`--test` option]: ../command-line-arguments.md#option-test
 [`-Z panic-abort-tests`]: https://github.com/rust-lang/rust/issues/67650
-[`available_concurrency`]: ../../std/thread/fn.available_concurrency.html
+[`available_parallelism`]: ../../std/thread/fn.available_parallelism.html
 [`cargo test`]: ../../cargo/commands/cargo-test.html
 [`libtest`]: ../../test/index.html
 [`main` function]: ../../reference/crates-and-source-files.html#main-functions