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std::pal::unix::thread fetching min stack size on netbsd. #125577

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Jun 2, 2024
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std::pal::unix::thread fetching min stack size on netbsd. #125577

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11 changes: 10 additions & 1 deletion library/std/src/sys/pal/unix/thread.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -717,5 +717,14 @@ unsafe fn min_stack_size(_: *const libc::pthread_attr_t) -> usize {

#[cfg(target_os = "netbsd")]
unsafe fn min_stack_size(_: *const libc::pthread_attr_t) -> usize {
2048 // just a guess
static STACK: crate::sync::OnceLock<usize> = crate::sync::OnceLock::new();

*STACK.get_or_init(|| {
let mut stack = unsafe { libc::sysconf(libc::_SC_THREAD_STACK_MIN) };
if stack < 0 {
stack = 2048; // just a guess
}

stack as usize
})
}
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