From 00f4521b205bf25c79f0fa7c9a6840941342bda4 Mon Sep 17 00:00:00 2001
From: Aapo Alasuutari <aapo.alasuutari@gmail.com>
Date: Tue, 28 Jun 2022 12:23:36 +0300
Subject: feat(ext/ffi): Thread safe callbacks (#14942)

---
 test_ffi/src/lib.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'test_ffi/src')

diff --git a/test_ffi/src/lib.rs b/test_ffi/src/lib.rs
index b4908d9cd..d6f29cbb8 100644
--- a/test_ffi/src/lib.rs
+++ b/test_ffi/src/lib.rs
@@ -211,6 +211,19 @@ pub extern "C" fn call_stored_function_2(arg: u8) {
   }
 }
 
+#[no_mangle]
+pub extern "C" fn call_stored_function_thread_safe() {
+  std::thread::spawn(move || {
+    std::thread::sleep(std::time::Duration::from_millis(1500));
+    unsafe {
+      if STORED_FUNCTION.is_none() {
+        return;
+      }
+      STORED_FUNCTION.unwrap()();
+    }
+  });
+}
+
 // FFI performance helper functions
 #[no_mangle]
 pub extern "C" fn nop() {}
-- 
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