Process::self()
1. Open the binder drive
2. Use of mmap fd returned for the binder to open up memory space for your data.
defaultServiceManager();
1. Create a Bpbinder, handler = 0. (Because the service as a client to interact with servicemanager .Bpbinder-> client, Bbbindr-> server, Bpbinder find Bbbinder by the handler identifier)
2.defaultServiceManager returns BpServiceManager, its value is mRemote Bpbinder, and implement business logic BpServiceManager of IServiceManager
IPCThreadState:
1. Each thread has a IPCThreadState, each IPCThreadState: has a mIn, mOut.mIn binder to the data receiving apparatus, mOut binder used to keep the data sent
Service for the service of threads:
Thread 1.startThreadPool newly created binder device is read by joinThreadPool, to see if there is a request
2. The main thread also calls joinThreadPool read binder device to see if there is a request