erlsrv: gracefully stop emulator on Windows shutdown

Windows will send the SERVICE_CONTROL_SHUTDOWN event to the service control
handler when shutting down the system. Instead of ignoring the event, erlsrv
will now invoke the stop action.  Likewise, the Erlang emulator (and it's port
drivers) must not quit upon reception of the CTRL_SHUTDOWN_EVENT event in the
console control handler.

3 files changed, 6 insertions, 2 deletions

diff --git a/erts/etc/win32/erlsrv/erlsrv_service.c b/erts/etc/win32/erlsrv/erlsrv_service.c
index 242e2905a9..8b734b0c05 100644
--- a/erts/etc/win32/erlsrv/erlsrv_service.c
+++ b/erts/etc/win32/erlsrv/erlsrv_service.c
@@ -104,11 +104,10 @@ static VOID WINAPI handler(DWORD control){
   log_debug(buffer);
   switch(control){
   case SERVICE_CONTROL_STOP:
+  case SERVICE_CONTROL_SHUTDOWN:
     set_stop_pending(30000,1);
     SetEvent(eventStop);
     return;
-  case SERVICE_CONTROL_SHUTDOWN:
-    return;
   default:
     reset_current();
     break;
diff --git a/erts/etc/win32/port_entry.c b/erts/etc/win32/port_entry.c
index 49b5ad2f34..9c3e750cbc 100644
--- a/erts/etc/win32/port_entry.c
+++ b/erts/etc/win32/port_entry.c
@@ -45,6 +45,8 @@ extern void mainCRTStartup(void);
 BOOL WINAPI erl_port_default_handler(DWORD ctrl){
     if(ctrl == CTRL_LOGOFF_EVENT)
 	return TRUE;
+    if(ctrl == CTRL_SHUTDOWN_EVENT)
+	return TRUE;
     return FALSE;
 }
 
diff --git a/erts/etc/win32/start_erl.c b/erts/etc/win32/start_erl.c
index 28c8e55bd3..41b221d5bc 100644
--- a/erts/etc/win32/start_erl.c
+++ b/erts/etc/win32/start_erl.c
@@ -585,6 +585,9 @@ BOOL WINAPI LogoffHandlerRoutine( DWORD dwCtrlType )
     if(dwCtrlType == CTRL_LOGOFF_EVENT) {
 	return TRUE;
     }
+    if(dwCtrlType == CTRL_SHUTDOWN_EVENT) {
+	return TRUE;
+    }
 
     return FALSE;
 }