1 files changed, 18 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/thread/pthread_kill.c b/libc-top-half/musl/src/thread/pthread_kill.c
new file mode 100644
index 0000000..79ddb20
--- /dev/null
+++ b/libc-top-half/musl/src/thread/pthread_kill.c
@@ -0,0 +1,18 @@
+#include "pthread_impl.h"
+#include "lock.h"
+
+int pthread_kill(pthread_t t, int sig)
+{
+	int r;
+	sigset_t set;
+	/* Block not just app signals, but internal ones too, since
+	 * pthread_kill is used to implement pthread_cancel, which
+	 * must be async-cancel-safe. */
+	__block_all_sigs(&set);
+	LOCK(t->killlock);
+	r = t->tid ? -__syscall(SYS_tkill, t->tid, sig)
+		: (sig+0U >= _NSIG ? EINVAL : 0);
+	UNLOCK(t->killlock);
+	__restore_sigs(&set);
+	return r;
+}