add robust FMutex, works fine; use boost circular.

lichao

2021-05-08 28f06bc49a4d8d69f1ea2f767863b7921d12f155

 src/shm.cpp

@@ -25,6 +25,7 @@
    mshm_t(open_or_create, name.c_str(), size, 0, AllowAll()),
    name_(name)
{
   pmutex_ = FindOrCreate<Mutex>("ShmSelfControlMutex0");
}

SharedMemory::~SharedMemory()