sched: Add sched_sleep_until

include/zinnia/sched.h

@@ -132,6 +132,8 @@ void sched_wake_locked(struct task* task);
 
 void sched_notify(struct task* task);
 
+void sched_sleep_until(uint64_t deadline_ns);
+
 [[noreturn]]
 void sched_exit();
 

sched/core.c

@@ -4,6 +4,7 @@
 #include <zinnia/assert.h>
 #include <zinnia/atomic.h>
 #include <zinnia/errno.h>
+#include <zinnia/park.h>
 #include <zinnia/process.h>
 #include <zinnia/sched.h>
 #include <zinnia/spin.h>
@@ -157,3 +158,8 @@ void task_lock(struct task* task) {
 void task_unlock(struct task* task) {
     spin_unlock(atomic_load(&task->lockp, ATOMIC_RELAXED));
 }
+
+void sched_sleep_until(uint64_t deadline_ns) {
+    const uint8_t key = 0;
+    park_timeout(&key, nullptr, nullptr, nullptr, 0, &deadline_ns);
+}