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+/*
+* Copyright 2009, 2010 Free Software Foundation, Inc.
+* Copyright 2010 Kestrel Signal Processing, Inc.
+*
+* This software is distributed under the terms of the GNU Affero Public License.
+* See the COPYING file in the main directory for details.
+*
+* This use of this software may be subject to additional restrictions.
+* See the LEGAL file in the main directory for details.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+
+#ifndef LOGGER_H
+#define LOGGER_H
+
+#include <syslog.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <sstream>
+#include <list>
+#include <map>
+#include <string>
+#include "Threads.h"
+
+
+#define _LOG(level) \
+ Log(LOG_##level).get() << pthread_self() \
+ << " " __FILE__ ":" << __LINE__ << ":" << __FUNCTION__ << ": "
+#define LOG(wLevel) \
+ if (gGetLoggingLevel(__FILE__)>=LOG_##wLevel) _LOG(wLevel)
+#define OBJLOG(wLevel) \
+ if (gGetLoggingLevel(__FILE__)>=LOG_##wLevel) _LOG(wLevel) << "obj: " << this << ' '
+
+#define LOG_ASSERT(x) { if (!(x)) LOG(EMERG) << "assertion " #x " failed"; } assert(x);
+
+
+#define DEFAULT_MAX_ALARMS 10
+
+
+/**
+ A C++ stream-based thread-safe logger.
+ Derived from Dr. Dobb's Sept. 2007 issue.
+ Updated to use syslog.
+ This object is NOT the global logger;
+ every log record is an object of this class.
+*/
+class Log {
+
+ public:
+
+ protected:
+
+ std::ostringstream mStream; ///< This is where we buffer up the log entry.
+ int mPriority; ///< Priority of current repot.
+
+ public:
+
+ Log(int wPriority)
+ :mPriority(wPriority)
+ { }
+
+ // Most of the work is in the desctructor.
+ /** The destructor actually generates the log entry. */
+ ~Log();
+
+ std::ostringstream& get();
+};
+
+
+
+std::list<std::string> gGetLoggerAlarms(); ///< Get a copy of the recent alarm list.
+
+
+/**@ Global control and initialization of the logging system. */
+//@{
+/** Initialize the global logging system. */
+void gLogInit(const char* name, const char* level=NULL, int facility=LOG_USER);
+/** Get the logging level associated with a given file. */
+int gGetLoggingLevel(const char *filename=NULL);
+//@}
+
+
+#endif
+
+// vim: ts=4 sw=4