thread_pool: async: propagate result to caller
diff --git a/sdk/include/thread_pool.h b/sdk/include/thread_pool.h
index cd5e4d4..7ff9ba1 100644
--- a/sdk/include/thread_pool.h
+++ b/sdk/include/thread_pool.h
@@ -131,15 +131,18 @@
* Asynchronously invoke a lambda. This moves the lambda to the heap and
* passes it to the thread pool's queue. If the lambda copies any stack
* objects by reference then the copy will fail.
+ *
+ * Returns 0 on success, or compartment-call failures (ENOTENOUGHSTACK,
+ * ENOTENOUGHTRUSTEDSTACK) if the thread pool cannot be invoked.
*/
template<typename T>
- void async(T &&lambda)
+ int async(T &&lambda)
{
// If this is a stateless function, just send a callback function
// pointer, don't copy zero bytes of state to the heap.
if constexpr (std::is_convertible_v<T, void (*)(void)>)
{
- thread_pool_async(
+ return thread_pool_async(
&detail::wrap_callback_function<std::remove_cvref_t<T>>, nullptr);
}
else
@@ -172,7 +175,7 @@
ThreadPoolCallback invoke =
&detail::wrap_callback_lambda<LambdaType>;
// Dispatch it.
- thread_pool_async(invoke, sealed);
+ return thread_pool_async(invoke, sealed);
}
}
} // namespace thread_pool
