if(SymbolValue(INTERRUPTS_ENABLED,thread)!=NIL)
thread_sigmask(SIG_SETMASK, os_context_sigmask_addr(context), 0);
#ifdef LISP_FEATURE_SB_THREAD
if(SymbolValue(INTERRUPTS_ENABLED,thread)!=NIL)
thread_sigmask(SIG_SETMASK, os_context_sigmask_addr(context), 0);
#ifdef LISP_FEATURE_SB_THREAD