搭建PVB架构，实现前端的基础布局、菜单、表格、图示等功能

libs/pvb/include/rllib/rlopcxmlda.h

@@ -0,0 +1,78 @@
+/***************************************************************************
+                          rlopcxmlda.h  -  description
+                             -------------------
+    begin                : Mon Aug 27 2007
+    copyright            : (C) 2007 by pvbrowser
+    email                : lehrig@t-online.de
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This library is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU LESSER GENERAL PUBLIC LICENSE as        *
+ *   published by the Free Software Foundation                             *
+ *                                                                         *
+ ***************************************************************************/
+/**
+use this class together with opcxmlda_client.
+opcxmlda_client will fill the shared memory with variables read over opc xml-da.
+opcxmlda_client will receive outgoing writes through it's mailbox.
+*/
+
+#ifndef _RL_OPC_XML_DA_H_
+#define _RL_OPC_XML_DA_H_
+
+#include "rldefine.h"
+#include "rlmailbox.h"
+#include "rlsharedmemory.h"
+
+/*! <pre>
+This class is for data acquisition within pvserver according to the pvbrowser principle.
+It communicates with the daemon opcxmlda_client by the means of a shared memory and a mailbox.
+</pre> */
+class rlOpcXmlDa
+{
+public:
+  // shared memory header
+  typedef struct
+  {
+    char ident[4];          // must be "opc"
+    int  maxItemNameLength; // maximum length of an item name
+    int  maxNameLength;     // maximum length of the item value
+    int  numItems;          // number of items in shared memory
+    int  readErrorCount;    // 0...65536 incremented by each read error
+    int  writeErrorCount;   // 0...65536 incremented by each write error
+    int  spare[8];          // for future use
+    char cspare[32];        // for future use
+  }SHM_HEADER;
+  
+  enum OPC_XML_DA_ENUM
+  {
+    OPCXMLDA_ERROR = 256*256*128
+  };
+
+#ifdef RLWIN32  
+  rlOpcXmlDa(const char *mailbox="c:\\automation\\mbx\\opcxmlda.mbx", const char *shared_memory="c:\\automation\\shm\\opcxmlda.shm", long shared_memory_size=65536);
+#else
+  rlOpcXmlDa(const char *mailbox="/srv/automation/mbx/opcxmlda.mbx", const char *shared_memory="/srv/automation/shm/opcxmlda.shm", long shared_memory_size=65536);
+#endif
+  virtual    ~rlOpcXmlDa();
+  const char *stringValue(const char *variable);
+  int         intValue(const char *variable);
+  float       floatValue(const char *variable);
+  int         writeStringValue(const char *variable, const char *value);
+  int         writeIntValue(const char *variable, int value);
+  int         writeFloatValue(const char *variable, float value);
+  int         readErrorCount();
+  int         writeErrorCount();
+  int         shmStatus(); // 0 if shared memory is ok | ERROR if shared memory is not ok
+
+private:
+  SHM_HEADER     *shmheader;
+  const char     *shmvalues;
+  rlMailbox      *mbx;
+  rlSharedMemory *shm;
+};
+
+#endif
+