Common use of asynManager Clause in Contracts

asynManager. This is the core part of asyn. It knows nothing about EPICS records. In fact it is completely independent of EPICS except that it uses libCom for OS-independent things like mutexes, message queues, events, etc. The queuing it provides is for callback requests to communicate with asynchronous drivers (ASYN_CANBLOCK) via pasynManager->queueRequest().