From 703e5d5be1766bad68a8ad89c57880c8c06b2f4a Mon Sep 17 00:00:00 2001
From: CJ van den Berg <cj@vdbonline.com>
Date: Wed, 4 Mar 2026 20:19:15 +0100
Subject: [PATCH] feat: add thespian_exit to the C API

---
 include/thespian/c/instance.h |  2 ++
 src/c/instance.cpp            | 14 ++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/include/thespian/c/instance.h b/include/thespian/c/instance.h
index 29e5977..8e48239 100644
--- a/include/thespian/c/instance.h
+++ b/include/thespian/c/instance.h
@@ -16,6 +16,8 @@ typedef void (*thespian_receiver_dtor)(thespian_behaviour_state);
 void thespian_receive(thespian_receiver, thespian_behaviour_state,
                       thespian_receiver_dtor);
 
+thespian_result thespian_exit(const char *status);
+
 bool thespian_get_trap();
 bool thespian_set_trap(bool);
 void thespian_link(thespian_handle);
diff --git a/src/c/instance.cpp b/src/c/instance.cpp
index 5007f58..a8b058b 100644
--- a/src/c/instance.cpp
+++ b/src/c/instance.cpp
@@ -33,6 +33,20 @@ void thespian_receive(thespian_receiver r, thespian_behaviour_state s,
 auto thespian_get_trap() -> bool { return thespian::trap(); }
 auto thespian_set_trap(bool on) -> bool { return thespian::trap(on); }
 
+namespace {
+thread_local cbor::buffer exit_msg_buf;     // NOLINT
+thread_local thespian_error exit_error_buf; // NOLINT
+} // namespace
+
+auto thespian_exit(const char *status) -> thespian_result {
+  auto r = thespian::exit(status);
+  if (r)
+    return nullptr;
+  exit_msg_buf = r.error();
+  exit_error_buf = {exit_msg_buf.data(), exit_msg_buf.size()};
+  return &exit_error_buf;
+}
+
 void thespian_link(thespian_handle h) {
   thespian::handle *h_{
       reinterpret_cast<thespian::handle *>( // NOLINT(*-reinterpret-cast)