pvAccessCPP

Release 6.0.0 (Dec 2017)

Incompatible changes

• Requires pvDataCPP >=7.0.0 due to headers moved from pvDataCPP into this module: requester.h, destoryable.h, and monitor.h
• Major changes to shared_ptr ownership rules for epics::pvAccess::ChannelProvider and associated classes.
• Add new library pvAccessIOC for use with PVAClientRegister.dbd and PVAServerRegister.dbd. Necessary to avoid having pvAccess library depend on all IOC core libraries.
• Added new library pvAccessCA with "ca" provider. Main pvAccess library no longer depends on libca. Applications needing the "ca" provider must link against pvAccessCA and pvAccess. See examples/Makefile in the source tree. The headers associated with this library are: caChannel.h, caProvider.h, and caStatus.h
• A number of headers which were previously installed, but considered "private", are no longer installed.
• epics::pvAccess::ChannelProviderRegistry may no longer be sub-classed.
• Removed access to singleton registry via getChannelProviderRegistry() and registerChannelProviderFactory() in favor of epics::pvAccess::ChannelProviderRegistry::clients() and epics::pvAccess::ChannelProviderRegistry::servers(). The "pva" and "ca" providers are registered with the clients() singleton. epics::pvAccess::ServerContext() looks up names with the servers() singleton.
• Removed deprecated epics::pvAccess::Properties
• The data members of epics::pvAccess::MonitorElement become const, preventing these pointers from being re-targeted.

Simplifications

• use of the epics::pvAccess::ChannelRequester interface is optional and may be omitted when calling createChannel(). Channel state change notifications are deliviered to individual operations via epics::pvAccess::ChannelBaseRequester::channelDisconnect()
• Default implementions added for the following methods
  • epics::pvAccess::Lockable::lock() and epics::pvAccess::Lockable::unlock() which do nothing.
  • epics::pvAccess::Channel::getConnectionState() returns CONNECTED
  • epics::pvAccess::Channel::isConnected() uses getConnectionState()
  • epics::pvAccess::Channel::getField() which errors
  • epics::pvAccess::Channel::getAccessRights() which returns rw
• Added epics::pvAccess::SimpleChannelProviderFactory template and epics::pvAccess::ChannelProviderRegistry::add() avoids need for custom factory.
• Added epics::pvAccess::MonitorElement::Ref iterator/smart-pointer to ensure proper handling of calls Monitor::poll() and Monitor::release().
• epics::pvAccess::PipelineMonitor "internal" is collapsed into epics::pvAccess::Monitor. PipelineMonitor becomes a typedef for Monitor.
• epics::pvAccess::RPCService is now a sub-class of epics::pvAccess::RPCServiceAsync

Additions

• pv/pvAccess.h now provides macros OVERRIDE and FINAL which conditionally expand to the c++11 keywords override and final.
• Deliver disconnect notifications to individual Operations (get/put/rpc/monitor/...) via new epics::pvAccess::ChannelBaseRequester::channelDisconnect()
• New API for server creation via epics::pvAccess::ServerContext::create() allows direct specification of configuration and ChannelProvider(s).
• Add epics::pvAccess::ServerContext::getCurrentConfig() to get actual configuration, eg. for use with a client.
• Classes from moved headers requester.h, destoryable.h, and monitor.h added to epics::pvAccess namespace. Typedefs provided in epics::pvData namespace.
• Added Client API based on pvac::ClientProvider
• pv/pvaVersion.h defines VERSIONINT and PVACCESSVERSION_INT
• epics::pvAccess::RPCClient may be directly constructed.
• epics::pvAccess::RPCServer allows epics::pvAccess::Configuration to be specified and access to ServerContext.
• Added epics::pvAccess::Configuration::keys() to iterate configuration parameters (excluding environment variables).
• Added epics::pvAccess::Destoryable::cleaner

Deprecations

• epics::pvAccess::GUID in favor of epics::pvAccess::ServerGUID due to win32 name conflict.

Release 5.0.0 (July 2016)

• Remote channel destroy support
• Multiple network inteface support
• Local multicast (repetitor) reimplemented
• Monitor reconnect when channel type changes fix
• C++11 compilation fixes
• Added version to pvaTools
• Memory management improved
• pipeline: ackAny argument percentage support
• Monitor overrun memory issues fixed
• CA provider destruction fixed
• Replaced LGPL wildcard matcher with simplistic EPICS version

Release 4.1.2 (Oct 2015)

• Improved Jenkins build support
• Removed QtCreated IDE configuration files
• Use of getSubField<> instead of e.g. getDoubleField()
• CA support for pvget, pvput and pvinfo.
• vxWorks/RTEMS compiler warnings resolved.
• Transport shutdown improved.
• CA DBR status fix.
• Monitor queue handling improved.
• Fixed bad performance on 10Gbit or faster networks.
• Async RPC service.

Release 4.0.5 (Dec 2014)

(Starting point for release notes.)