Commit fe6514e

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std::thread::available_parallelism merging linux/android/freebsd version

FreeBSD 13.1 had introduced a sched cpu affinity compatibility layer with Linux. 13.0 and even 13.1 being EOL, we can simplify here.

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

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+11

-22

lines changed

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

Lines changed: 11 additions & 22 deletions

Original file line number	Diff line number	Diff line change
`@@ -350,6 +350,7 @@ pub fn available_parallelism() -> io::Result<NonZero<usize>> {`
`350`	`350`	`target_os = "hurd",`
`351`	`351`	`target_os = "linux",`
`352`	`352`	`target_os = "aix",`
	`353`	`+ target_os = "freebsd",`
`353`	`354`	`target_vendor = "apple",`
`354`	`355`	`))] {`
`355`	`356`	`#[allow(unused_assignments)]`
`@@ -359,9 +360,17 @@ pub fn available_parallelism() -> io::Result<NonZero<usize>> {`
`359`	`360`	`#[cfg(any(target_os = "android", target_os = "linux"))]`
`360`	`361`	`{`
`361`	`362`	`quota = cgroups::quota().max(1);`
`362`		`- let mut set: libc::cpu_set_t = unsafe { mem::zeroed() };`
	`363`	`+ }`
	`364`	`+`
	`365`	`+ #[cfg(any(target_os = "android", target_os = "linux", target_os = "freebsd"))]`
	`366`	`+ {`
	`367`	`+ #[cfg(not(target_os = "freebsd"))]`
	`368`	`+ type cpuset = libc::cpu_set_t;`
	`369`	`+ #[cfg(target_os = "freebsd")]`
	`370`	`+ type cpuset = libc::cpuset_t;`
	`371`	`+ let mut set: cpuset = unsafe { mem::zeroed() };`
`363`	`372`	`unsafe {`
`364`		`- if libc::sched_getaffinity(0, mem::size_of::<libc::cpu_set_t>(), &mut set) == 0 {`
	`373`	`+ if libc::sched_getaffinity(0, mem::size_of::<cpuset>(), &mut set) == 0 {`
`365`	`374`	`let count = libc::CPU_COUNT(&set) as usize;`
`366`	`375`	`let count = count.min(quota);`
`367`	`376`
`@@ -386,32 +395,12 @@ pub fn available_parallelism() -> io::Result<NonZero<usize>> {`
`386`	`395`	`}`
`387`	`396`	`}`
`388`	`397`	`} else if #[cfg(any(`
`389`		`- target_os = "freebsd",`
`390`	`398`	`target_os = "dragonfly",`
`391`	`399`	`target_os = "openbsd",`
`392`	`400`	`target_os = "netbsd",`
`393`	`401`	`))] {`
`394`	`402`	`use crate::ptr;`
`395`	`403`
`396`		`- #[cfg(target_os = "freebsd")]`
`397`		`- {`
`398`		`- let mut set: libc::cpuset_t = unsafe { mem::zeroed() };`
`399`		`- unsafe {`
`400`		`- if libc::cpuset_getaffinity(`
`401`		`- libc::CPU_LEVEL_WHICH,`
`402`		`- libc::CPU_WHICH_PID,`
`403`		`- -1,`
`404`		`- mem::size_of::<libc::cpuset_t>(),`
`405`		`- &mut set,`
`406`		`- ) == 0 {`
`407`		`- let count = libc::CPU_COUNT(&set) as usize;`
`408`		`- if count > 0 {`
`409`		`- return Ok(NonZero::new_unchecked(count));`
`410`		`- }`
`411`		`- }`
`412`		`- }`
`413`		`- }`
`414`		`-`
`415`	`404`	`#[cfg(target_os = "netbsd")]`
`416`	`405`	`{`
`417`	`406`	`unsafe {`

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Commit fe6514e

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

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