From aca8e66854658fc513b49f3f7464f3cea1d7fc1f Mon Sep 17 00:00:00 2001
From: Josh Triplett <josh@joshtriplett.org>
Date: Sat, 4 Jan 2025 18:04:45 +0200
Subject: [PATCH] Implement `raise`

---
 src/runtime.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/runtime.rs b/src/runtime.rs
index 0b2fc0649..382e940df 100644
--- a/src/runtime.rs
+++ b/src/runtime.rs
@@ -450,6 +450,17 @@ pub unsafe fn tgkill(tid: Pid, sig: Signal) -> io::Result<()> {
     backend::runtime::syscalls::tgkill(tid, sig)
 }
 
+/// `raise(sig)`—Send a signal to the current thread.
+///
+/// # References
+///  - [Linux]
+///
+/// [Linux]: https://man7.org/linux/man-pages/man3/raise.3.html
+#[inline]
+pub fn raise(sig: Signal) -> io::Result<()> {
+    // SAFETY: This sends a signal to the current thread, and our own thread ID can't be recycled.
+    unsafe { backend::runtime::syscalls::tkill(backend::thread::syscalls::gettid(), sig) }
+}
 
 /// `rt_sigprocmask(how, set, oldset)`—Adjust the process signal mask.
 ///