nest              487 gc/os_dep.c        ULONG nest;
nest              489 gc/os_dep.c        DosEnterMustComplete(&nest);
nest              490 gc/os_dep.c        if (nest != 1) ABORT("nested GC_disable_signals");
nest              495 gc/os_dep.c        ULONG nest;
nest              497 gc/os_dep.c        DosExitMustComplete(&nest);
nest              498 gc/os_dep.c        if (nest != 0) ABORT("GC_enable_signals");