Added logger which is implemented using standard EPICSv3 logging facilities.

pvAccessApp/utils/logger.cpp

@@ -0,0 +1,77 @@
+/*
+ * logger.cpp
+ *
+ *  Created on: Dec 10, 2010
+ *      Author: Miha Vitorovic
+ */
+
+#include "logger.h"
+
+#include <noDefaultMethods.h>
+#include <lock.h>
+#include <pvType.h>
+
+#include <epicsExit.h>
+#include <errlog.h>
+
+#include <fstream>
+#include <iostream>
+#include <time.h>
+#include <cstring>
+
+using namespace epics::pvData;
+using std::ofstream;
+using std::ios;
+using std::endl;
+
+namespace epics {
+    namespace pvAccess {
+
+        class FileLogger : public NoDefaultMethods {
+        public:
+            FileLogger(String name) {
+                logFile.open(name.data(), ios::app);
+            }
+
+            ~FileLogger() {
+                logFile.close();
+            }
+
+            void logMessage(const char* message) {
+                time_t rawtime;
+                time(&rawtime);
+                char* timeStr = ctime(&rawtime);
+                timeStr[strlen(timeStr)-1]='\0'; // remove newline
+
+                logFile<<timeStr<<"\t"<<message; // the newline is added by the caller
+            }
+        private:
+            ofstream logFile;
+
+        };
+
+        static FileLogger* fileLogger = NULL;
+
+        static void errLogFileListener(void* pPrivate, const char *message) {
+            fileLogger->logMessage(message);
+        }
+
+        static void exitFileLoggerHandler(void* pPrivate) {
+            errlogFlush();
+            delete fileLogger;
+        }
+
+        void createFileLogger(String fname) {
+            static Mutex mutex = Mutex();
+            Lock xx(&mutex);
+
+            if(fileLogger==NULL) {
+                fileLogger = new FileLogger(fname);
+                errlogInit(2048);
+                errlogAddListener(errLogFileListener, NULL);
+                epicsAtExit(exitFileLoggerHandler, NULL);
+            }
+        }
+
+    }
+}