Flush loggers in Application::Exit

fixes #6861

lib/base/application.cpp

@@ -20,7 +20,7 @@
 #include "base/application.hpp"
 #include "base/stacktrace.hpp"
 #include "base/timer.hpp"
-#include "base/logger_fwd.hpp"
+#include "base/logger.hpp"
 #include "base/exception.hpp"
 #include "base/objectlock.hpp"
 #include "base/utility.hpp"
@@ -115,6 +115,11 @@ Application::~Application(void)
 void Application::Exit(int rc)
 {
 	std::cout.flush();
+
+	BOOST_FOREACH(const Logger::Ptr& logger, Logger::GetLoggers()) {
+		logger->Flush();
+	}
+
 	_exit(rc); // Yay, our static destructors are pretty much beyond repair at this point.
 }
 

lib/base/logger.hpp

@@ -63,6 +63,8 @@ public:
 	 */
 	virtual void ProcessLogEntry(const LogEntry& entry) = 0;
 
+	virtual void Flush(void) = 0;
+
 	static std::set<Logger::Ptr> GetLoggers(void);
 
 	static void DisableConsoleLog(void);

lib/base/streamlogger.cpp

@@ -60,7 +60,13 @@ StreamLogger::~StreamLogger(void)
 
 void StreamLogger::FlushLogTimerHandler(void)
 {
-	m_Stream->flush();
+	Flush();
+}
+
+void StreamLogger::Flush(void)
+{
+	if (m_Stream)
+		m_Stream->flush();
 }
 
 void StreamLogger::BindStream(std::ostream *stream, bool ownsStream)

lib/base/streamlogger.hpp

@@ -49,6 +49,7 @@ public:
 
 protected:
 	virtual void ProcessLogEntry(const LogEntry& entry);
+	virtual void Flush(void);
 
 private:
 	static boost::mutex m_Mutex;

lib/base/sysloglogger.cpp

@@ -70,4 +70,9 @@ void SyslogLogger::ProcessLogEntry(const LogEntry& entry)
 
 	syslog(severity | LOG_USER, "%s", entry.Message.CStr());
 }
+
+void SyslogLogger::Flush(void)
+{
+	/* Nothing to do here. */
+}
 #endif /* _WIN32 */

lib/base/sysloglogger.hpp

@@ -42,6 +42,7 @@ public:
 
 protected:
 	virtual void ProcessLogEntry(const LogEntry& entry);
+	virtual void Flush(void);
 };
 
 }