1 files changed, 60 insertions, 0 deletions
diff --git a/sys/sys/task.h b/sys/sys/task.h
new file mode 100644
index 0000000..222c2a7
--- /dev/null
+++ b/sys/sys/task.h
@@ -0,0 +1,60 @@
+/*	$OpenBSD: task.h,v 1.16 2019/06/23 12:56:10 kettenis Exp $ */
+
+/*
+ * Copyright (c) 2013 David Gwynne <dlg@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _SYS_TASK_H_
+#define _SYS_TASK_H_
+
+#include <sys/queue.h>
+
+struct taskq;
+
+struct task {
+	TAILQ_ENTRY(task) t_entry;
+	void		(*t_func)(void *);
+	void		*t_arg;
+	unsigned int	t_flags;
+};
+
+#define TASK_ONQUEUE		1
+#define TASK_BARRIER		2
+
+TAILQ_HEAD(task_list, task);
+
+#define TASKQ_MPSAFE		(1 << 0)
+
+#define TASK_INITIALIZER(_f, _a)  {{ NULL, NULL }, (_f), (_a), 0 }
+
+#ifdef _KERNEL
+extern struct taskq *const systq;
+extern struct taskq *const systqmp;
+
+struct taskq	*taskq_create(const char *, unsigned int, int, unsigned int);
+void		 taskq_destroy(struct taskq *);
+void		 taskq_barrier(struct taskq *);
+
+void		 taskq_del_barrier(struct taskq *, struct task *);
+
+void		 task_set(struct task *, void (*)(void *), void *);
+int		 task_add(struct taskq *, struct task *);
+int		 task_del(struct taskq *, struct task *);
+
+#define task_pending(_t)	((_t)->t_flags & TASK_ONQUEUE)
+
+#endif /* _KERNEL */
+
+#endif /* _SYS_TASK_H_ */