use copy and monitor from pvDataCPP; imlement example plugin; algorithm => plugin

2014-04-23 09:25:58 -04:00
parent 342ab45dc8
commit fe62a7181f
15 changed files with 381 additions and 187 deletions
--- a/exampleDatabase/src/exampleMonitorPlugin.cpp
+++ b/exampleDatabase/src/exampleMonitorPlugin.cpp
@@ -0,0 +1,97 @@
+/* exampleMonitorPlugin.h */
+/**
+ * Copyright - See the COPYRIGHT that is included with this distribution.
+ * EPICS pvData is distributed subject to a Software License Agreement found
+ * in file LICENSE that is included with this distribution.
+ */
+/**
+ * @author mrk
+ * @date 2014.04.16
+ */
+
+#include <pv/convert.h>
+#include <pv/monitorPlugin.h>
+#include <pv/exampleMonitorPlugin.h>
+
+namespace epics { namespace pvDatabase { 
+using namespace epics::pvData;
+using std::cout;
+using std::endl;
+
+static String pluginName("onChange");
+static ConvertPtr convert(getConvert());
+
+class OnChangePlugin;
+typedef std::tr1::shared_ptr<OnChangePlugin> OnChangePluginPtr;
+class OnChangePluginCreator;
+typedef std::tr1::shared_ptr<OnChangePluginCreator> OnChangePluginCreatorPtr;
+
+class OnChangePlugin : public MonitorPlugin
+{
+public:
+    virtual ~OnChangePlugin(){}
+    OnChangePlugin() {}
+    bool init(
+        FieldConstPtr const &field,
+        StructureConstPtr const &top,
+        PVStructurePtr const &pvFieldOptions)
+   {
+        pvField = getPVDataCreate()->createPVField(field);
+        raiseMonitor = true;
+        if(pvFieldOptions!=NULL) {
+            PVStringPtr pvString =
+                pvFieldOptions->getSubField<PVString>("raiseMonitor");
+                if(pvString!=NULL) {
+                    String value = pvString->get();
+                    if(value.compare("false")==0) raiseMonitor = false;
+                }
+        }
+        return true;
+   }
+   virtual String &getName(){return pluginName;}
+   virtual bool causeMonitor(
+        PVFieldPtr const &pvNew,
+        PVStructurePtr const &pvTop,
+        MonitorElementPtr const &monitorElement)
+   {
+       bool isSame = convert->equals(pvNew,pvField);
+       if(isSame) return false;
+       convert->copy(pvNew,pvField);
+       return raiseMonitor;
+   }
+private:
+   PVFieldPtr pvField;
+   bool raiseMonitor;
+};
+
+class OnChangePluginCreator : public MonitorPluginCreator
+{
+public:
+    virtual String &getName(){return pluginName;}
+    virtual MonitorPluginPtr create(
+        FieldConstPtr const &field,
+        StructureConstPtr const &top,
+        PVStructurePtr const &pvFieldOptions)
+   {
+       OnChangePluginPtr plugin(new OnChangePlugin());
+       bool result = plugin->init(field,top,pvFieldOptions);
+       if(!result) return MonitorPluginPtr();
+       return plugin;
+   }
+
+};
+
+void ExampleMonitorPlugin::create()
+{
+    static OnChangePluginCreatorPtr plugin;
+    static Mutex mutex;
+    Lock xx(mutex);
+    if(plugin==NULL) {
+        plugin = OnChangePluginCreatorPtr(new OnChangePluginCreator());
+        MonitorPluginManager::get()->addPlugin(pluginName,plugin);
+    }
+}
+
+
+}}
+