several minor problems found while developing pvDatabaseCPP

pvDataApp/factory/PVDataCreateFactory.cpp

@@ -62,7 +62,11 @@ template<typename T>
 T BasePVScalar<T>::get() const  { return value;}
 
 template<typename T>
-void BasePVScalar<T>::put(T val){value = val;}
+void BasePVScalar<T>::put(T val)
+{
+    value = val;
+    PVField::postPut();
+}
 
 template<typename T>
 void BasePVScalar<T>::serialize(ByteBuffer *pbuffer,
@@ -120,7 +124,11 @@ BasePVString::~BasePVString() {}
 
 String BasePVString::get() const  { return value;}
 
-void BasePVString::put(String val){value = val;}
+void BasePVString::put(String val)
+{
+    value = val;
+    postPut();
+}
 
 void BasePVString::serialize(ByteBuffer *pbuffer,
     SerializableControl *pflusher) const

pvDataApp/factory/PVField.cpp

@@ -158,7 +158,7 @@ void PVField::renameField(String const & newName)
 
 void PVField::postPut() 
 {
-   if(postHandler!=NULL) postHandler->postPut();
+   if(postHandler.get()!=NULL) postHandler->postPut();
 }
 
 void PVField::setPostHandler(PostHandlerPtr const &handler)

pvDataApp/misc/lock.h

@@ -44,6 +44,15 @@ public:
             locked=false;
         }
     }
+    bool tryLock()
+    {
+         if(locked) return true;
+         if(mutexPtr.tryLock()) {
+             locked = true;
+             return true;
+         }
+         return false;
+    }
     bool ownsLock() const{return locked;}
 private:
     Mutex &mutexPtr;

pvDataApp/pv/pvData.h

@@ -75,6 +75,8 @@ typedef std::vector<PVStructurePtr>::const_iterator PVStructurePtrArray_const__i
  * typedef for a pointer to a PVStructureArray.
  */
 typedef std::tr1::shared_ptr<PVStructureArray> PVStructureArrayPtr;
+typedef std::vector<PVStructureArrayPtr> PVStructureArrayPtrArray;
+typedef std::tr1::shared_ptr<PVStructureArrayPtrArray> PVStructureArrayPtrArrayPtr;
 
 /**
  * This class provides auxillary information about a PVField.
@@ -140,8 +142,7 @@ private:
 /**
  * This class is implemented by code that calls setPostHander
  */
-class PostHandler :
-  public std::tr1::enable_shared_from_this<PostHandler>
+class PostHandler 
 {
 public:
     POINTER_DEFINITIONS(PostHandler);