add EmergencyShutdown

stepmania/src/archutils/Unix/EmergencyShutdown.cpp

@@ -0,0 +1,20 @@
+#include "global.h"
+#include "EmergencyShutdown.h"
+#include "RageUtil.h"
+
+typedef void (*Callback)();
+static Callback g_pEmergencyFunc[5];
+static unsigned g_iNumEmergencyFuncs = 0;
+
+void RegisterEmergencyShutdownCallback( void (*pFunc)() )
+{
+	ASSERT( g_iNumEmergencyFuncs+1 < ARRAYSIZE(g_pEmergencyFunc) );
+	g_pEmergencyFunc[ g_iNumEmergencyFuncs++ ] = pFunc;
+}
+
+void DoEmergencyShutdown()
+{
+	for( unsigned i = 0; i < g_iNumEmergencyFuncs; ++i )
+		g_pEmergencyFunc[i]();
+}
+

stepmania/src/archutils/Unix/EmergencyShutdown.h

@@ -0,0 +1,8 @@
+#ifndef EMERGENCY_SHUTDOWN_H
+#define EMERGENCY_SHUTDOWN_H
+
+void RegisterEmergencyShutdownCallback( void (*pFunc)() );
+void DoEmergencyShutdown();
+
+#endif
+