fix socket busy loop; del locked readall; refactor.

lichao

2021-04-26 1b167ec5ad101ac44451381e26cc73ab5d67d2a1

 src/defs.h

@@ -37,6 +37,7 @@
class SharedMemory;
} // namespace bhome_shm

std::string BHomeShmName();
bhome_shm::SharedMemory &BHomeShm();
bool GlobalInit(bhome_shm::SharedMemory &shm);
typedef std::string Topic;