Merge pull request #73 from epics-base/multichannelmultiprovider

multiChannel now allows an array of provider names

documentation/RELEASE_NOTES.md

@@ -2,7 +2,7 @@
 
 This document summarizes the changes to the module between releases.
 
-## Release 4.8.0 (EPICS 7.0.4.* March 2021
+## Release 4.8.0 (EPICS 7.0.5.* March 2021)
 
 * PvaClientNTMultiData::getChannelChangeFlags is a new method. It fixes issue #66.
 * Fix for issue #68. Both PvaClientArray and PvaClientField are not longer present. Neither was previously implemented.

src/pv/pvaClientMultiChannel.h

@@ -66,14 +66,19 @@ public:
      * @param pvaClient The interface to pvaClient.
      * @param channelNames The names of the channel..
      * @param providerName The name of the provider.
+     * This is also used for the provider for all channels
+     * with providerNames.size less than channelNames.size()
      * @param maxNotConnected The maximum number of channels that can be disconnected.
+     * @param providerNames The providerName for each Channells
      * @return The interface to the PvaClientMultiChannel
      */
     static PvaClientMultiChannelPtr create(
          PvaClientPtr const &pvaClient,
          epics::pvData::shared_vector<const std::string> const & channelNames,
          std::string const & providerName = "pva",
-         size_t maxNotConnected=0
+         size_t maxNotConnected=0,
+         epics::pvData::shared_vector<const std::string> const & providerNames
+             = epics::pvData::shared_vector<const std::string>()
      );
      /**
      * @brief Destructor
@@ -150,15 +155,18 @@ private:
         PvaClientPtr const &pvaClient,
         epics::pvData::shared_vector<const std::string> const & channelNames,
         std::string const & providerName,
-        size_t maxNotConnected);
+        size_t maxNotConnected,
+        epics::pvData::shared_vector<const std::string> const & providerNames);
     void checkConnected();
 
     PvaClientPtr pvaClient;
     epics::pvData::shared_vector<const std::string> channelNames;
     std::string providerName;
     size_t maxNotConnected;
+    epics::pvData::shared_vector<const std::string> const & providerNames;
 
     size_t numChannel;
+    size_t numProviderNames;
     epics::pvData::Mutex mutex;
 
     size_t numConnected;

src/pvaClientMultiChannel.cpp

@@ -30,10 +30,12 @@ PvaClientMultiChannelPtr PvaClientMultiChannel::create(
    PvaClientPtr const &pvaClient,
    shared_vector<const string> const & channelNames,
    string const & providerName,
-   size_t maxNotConnected)
+   size_t maxNotConnected,
+   shared_vector<const string> const & providerNames)
 {
     return PvaClientMultiChannelPtr(
-        new PvaClientMultiChannel(pvaClient,channelNames,providerName,maxNotConnected));
+        new PvaClientMultiChannel(
+        pvaClient,channelNames,providerName,maxNotConnected,providerNames));
 }
 
 
@@ -41,12 +43,15 @@ PvaClientMultiChannel::PvaClientMultiChannel(
     PvaClientPtr const &pvaClient,
     shared_vector<const string> const & channelNames,
     string const & providerName,
-    size_t maxNotConnected)
+    size_t maxNotConnected,
+    shared_vector<const string> const & providerNames)
 : pvaClient(pvaClient),
   channelNames(channelNames),
   providerName(providerName),
   maxNotConnected(maxNotConnected),
+  providerNames(providerNames),
   numChannel(channelNames.size()),
+  numProviderNames(providerNames.size()),
   numConnected(0),
   firstConnect(true),
   pvaClientChannelArray(PvaClientChannelArray(numChannel,PvaClientChannelPtr())),
@@ -79,7 +84,11 @@ Status PvaClientMultiChannel::connect(double timeout)
     if(!firstConnect) return Status::Ok;
     firstConnect = false;
     for(size_t i=0; i< numChannel; ++i) {
-        pvaClientChannelArray[i] = pvaClient->createChannel(channelNames[i],providerName);
+        if(numProviderNames<=i) {
+            pvaClientChannelArray[i] = pvaClient->createChannel(channelNames[i],providerName);
+        } else {
+            pvaClientChannelArray[i] = pvaClient->createChannel(channelNames[i],providerNames[i]);
+        }    
         pvaClientChannelArray[i]->issueConnect();
     }
     Status returnStatus = Status::Ok;