+
+/* Call the handler from HANDLER immediately. This function
+ runs signal handlers when returning to the event loop would be too
+ slow. Do not call this directly; use gdb_call_async_signal_handler,
+ below, with IMMEDIATE_P == 1. */
+void call_async_signal_handler (struct async_signal_handler *handler);
+
+/* Call the handler from HANDLER the next time through the event loop.
+ Do not call this directly; use gdb_call_async_signal_handler,
+ below, with IMMEDIATE_P == 0. */
+void mark_async_signal_handler (struct async_signal_handler *handler);
+
+/* Wrapper for the body of signal handlers. Call this function from
+ any SIGINT handler which needs to access GDB data structures or
+ escape via longjmp. If IMMEDIATE_P is set, this triggers either
+ immediately (for POSIX platforms), or from gdb_select (for
+ MinGW). If IMMEDIATE_P is clear, the handler will run the next
+ time we return to the event loop and any current select calls
+ will be interrupted. */
+
+void gdb_call_async_signal_handler (struct async_signal_handler *handler,
+ int immediate_p);
+
+/* Create and register an asynchronous event source in the event loop,
+ and set PROC as its callback. CLIENT_DATA is passed as argument to
+ PROC upon its invocation. Returns a pointer to an opaque structure
+ used to mark as ready and to later delete this event source from
+ the event loop. */
+extern struct async_event_handler *
+ create_async_event_handler (async_event_handler_func *proc,
+ gdb_client_data client_data);
+
+/* Remove the event source pointed by HANDLER_PTR created by
+ CREATE_ASYNC_EVENT_HANDLER from the event loop, and release it. */
+extern void
+ delete_async_event_handler (struct async_event_handler **handler_ptr);
+
+/* Call the handler from HANDLER the next time through the event
+ loop. */
+extern void mark_async_event_handler (struct async_event_handler *handler);