PvaClientProcess

pvaClientProcess is a synchronous wrapper for the pvAccess::ChannelProcess API, which is a callback based API. Thus it is easier to use than pvAccess::ChannelProcess itself.

An instance of PvaClientProcess is created via a call to one of the followimg:

class PvaClientChannel
...
{
...
    PvaClientProcessPtr createProcess(std::string const & request = "");
    PvaClientProcessPtr createProcess(epics::pvData::PVStructurePtr const &  pvRequest);
...
};

An instance of PvaClientProcess connects to a single channel. PvaClientProcess has both synchronous methods, which block, and non blocking methods.

PvaClientChannel has methods:

connect             Calls issueConnect and then waitConnect.
issueConnect        issues a request to the server to create the server side of ChannelPut.
waitConnect         blocks until server responds that it has created the ChannelPut.
process             Calls issueProcess and then waitProcess.
issueProcess        issues a process request to the server.
waitProcess         waits until the server send a message that the process is complete.

issueConnect and issueProcess do not block. All other methods can block.