1 files changed, 49 insertions, 0 deletions
diff --git a/src/orphanage.c b/src/orphanage.c
new file mode 100644
index 0000000..7415e8b
--- /dev/null
+++ b/src/orphanage.c
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
+/* Copyright 2024, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
+
+#include <kmi/assert.h>
+#include <kmi/orphanage.h>
+
+#include <arch/proc.h>
+
+/**
+ * @file orphanage.c
+ *
+ * Stuff related to orphaned threads implementation.
+ */
+
+bool orphan(struct tcb *t)
+{
+	struct tcb *r = get_rproc(t);
+	return !r || r->dead;
+}
+
+void orphanize(struct tcb *t)
+{
+	catastrophic_assert(!is_rpc(t));
+
+	struct tcb *r = get_tcb(t->rid);
+	if (r)
+		unreference_proc(r);
+
+	/* attach to init process */
+	struct tcb *init = get_tcb(1);
+	reference_proc(init);
+
+	t->rid = 1;
+	t->pid = 1;
+	t->eid = 1;
+
+	t->proc = init->proc;
+	use_vmem(t->proc.vmem);
+
+	catastrophic_assert(init->callback);
+	set_args3(t, 0, SYS_USER_ORPHANED, t->tid);
+	set_return(t, init->callback);
+	t->callback = init->callback;
+
+	/** @todo release irqs, here or later? */
+
+	ret_userspace_fast();
+	unreachable();
+}