1 files changed, 42 insertions, 0 deletions
diff --git a/sys/contrib/openzfs/include/sys/zthr.h b/sys/contrib/openzfs/include/sys/zthr.h
new file mode 100644
index 000000000000..ae8c57e9eea2
--- /dev/null
+++ b/sys/contrib/openzfs/include/sys/zthr.h
@@ -0,0 +1,42 @@
+/*
+ * CDDL HEADER START
+ *
+ * This file and its contents are supplied under the terms of the
+ * Common Development and Distribution License ("CDDL"), version 1.0.
+ * You may only use this file in accordance with the terms of version
+ * 1.0 of the CDDL.
+ *
+ * A full copy of the text of the CDDL should have accompanied this
+ * source. A copy of the CDDL is also available via the Internet at
+ * http://www.illumos.org/license/CDDL.
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2017, 2018 by Delphix. All rights reserved.
+ */
+
+#ifndef _SYS_ZTHR_H
+#define	_SYS_ZTHR_H
+
+typedef struct zthr zthr_t;
+typedef void (zthr_func_t)(void *, zthr_t *);
+typedef boolean_t (zthr_checkfunc_t)(void *, zthr_t *);
+
+extern zthr_t *zthr_create(const char *zthr_name,
+    zthr_checkfunc_t checkfunc, zthr_func_t *func, void *arg);
+extern zthr_t *zthr_create_timer(const char *zthr_name,
+    zthr_checkfunc_t *checkfunc, zthr_func_t *func, void *arg,
+	hrtime_t nano_wait);
+extern void zthr_destroy(zthr_t *t);
+
+extern void zthr_wakeup(zthr_t *t);
+extern void zthr_cancel(zthr_t *t);
+extern void zthr_resume(zthr_t *t);
+extern void zthr_wait_cycle_done(zthr_t *t);
+
+extern boolean_t zthr_iscancelled(zthr_t *t);
+extern boolean_t zthr_has_waiters(zthr_t *t);
+
+#endif /* _SYS_ZTHR_H */