1 files changed, 21 insertions, 0 deletions
diff --git a/libhw/alarmclock.c b/libhw/alarmclock.c
new file mode 100644
index 0000000..7b311c0
--- /dev/null
+++ b/libhw/alarmclock.c
@@ -0,0 +1,21 @@
+/* libhw/alarmclock.c - Device-independent <libhw/generic/alarmclock.h> utilities
+ *
+ * Copyright (C) 2024  Luke T. Shumaker <lukeshu@lukeshu.com>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+#include <libcr/coroutine.h>
+#include <libmisc/vcall.h>
+
+#include <libhw/generic/alarmclock.h>
+
+static void alarmclock_sleep_intrhandler(void *_arg) {
+	cid_t *cid = _arg;
+	cr_unpause_from_intrhandler(*cid);
+}
+
+void alarmclock_sleep_until_ns(implements_alarmclock *clock, uint64_t abstime_ns) {
+	cid_t cid = cr_getcid();
+	struct alarmclock_trigger trigger;
+	VCALL(clock, add_trigger, &trigger, abstime_ns, alarmclock_sleep_intrhandler, &cid);
+}