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bool_t rpc_control(int op,void *info);
MT-Safe
This RPC library routine allows applications to set and modify global RPC attributes that apply to clients as well as servers. At present, it supports only server side operations. This function allows applications to set and modify global attributes that apply to client as well as server functions. op indicates the type of operation, and info is a pointer to the operation specific information. The supported values of op and their argument types, and what they do are:
RPC_SVC_MTMODE_SET int * set multithread mode RPC_SVC_MTMODE_GET int * get multithread mode RPC_SVC_THRMAX_SET int * set maximum number of threads RPC_SVC_THRMAX_GET int * get maximum number of threads RPC_SVC_THRTOTAL_GET int * get number of active threads RPC_SVC_THRCREATES_GET int * get number of threads created RPC_SVC_THRERRORS_GET int * get number of thread create errors
There are three multithread (MT) modes. These are:
RPC_SVC_MT_NONE Single threaded mode (default) RPC_SVC_MT_AUTO Automatic MT mode RPC_SVC_MT_USER User MT mode
Unless the application sets the Automatic or User MT modes, it will stay in the default (single threaded) mode. See the Network Interfaces Programming Guide for the meanings of these modes and programming examples. Once a mode is set, it cannot be changed.
By default, the maximum number of threads that the server will create at any time is 16. This allows the service developer to put a bound on thread resources consumed by a server. If a server needs to process more than 16 client requests concurrently, the maximum number of threads must be set to the desired number. This parameter may be set at any time by the server.
Set and get operations will succeed even in modes where the operations don’t apply. For example, you can set the maximum number of threads in any mode, even though it makes sense only for the Automtatic MT mode. All of the get operations except RPC_SVC_MTMODE_GET apply only to the Automatic MT mode, so values returned in other modes may be undefined.