1 files changed, 43 insertions, 0 deletions
diff --git a/third_party/rust/nix/src/sys/pthread.rs b/third_party/rust/nix/src/sys/pthread.rs
new file mode 100644
index 0000000000..6bad03a4d4
--- /dev/null
+++ b/third_party/rust/nix/src/sys/pthread.rs
@@ -0,0 +1,43 @@
+//! Low level threading primitives
+
+#[cfg(not(target_os = "redox"))]
+use crate::errno::Errno;
+#[cfg(not(target_os = "redox"))]
+use crate::Result;
+use libc::{self, pthread_t};
+
+/// Identifies an individual thread.
+pub type Pthread = pthread_t;
+
+/// Obtain ID of the calling thread (see
+/// [`pthread_self(3)`](https://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_self.html)
+///
+/// The thread ID returned by `pthread_self()` is not the same thing as
+/// the kernel thread ID returned by a call to `gettid(2)`.
+#[inline]
+pub fn pthread_self() -> Pthread {
+    unsafe { libc::pthread_self() }
+}
+
+feature! {
+#![feature = "signal"]
+
+/// Send a signal to a thread (see [`pthread_kill(3)`]).
+///
+/// If `signal` is `None`, `pthread_kill` will only preform error checking and
+/// won't send any signal.
+///
+/// [`pthread_kill(3)`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_kill.html
+#[allow(clippy::not_unsafe_ptr_arg_deref)]
+#[cfg(not(target_os = "redox"))]
+pub fn pthread_kill<T>(thread: Pthread, signal: T) -> Result<()>
+    where T: Into<Option<crate::sys::signal::Signal>>
+{
+    let sig = match signal.into() {
+        Some(s) => s as libc::c_int,
+        None => 0,
+    };
+    let res = unsafe { libc::pthread_kill(thread, sig) };
+    Errno::result(res).map(drop)
+}
+}