- don't delete the null logger.

- don't leak LogStreamInfo when detaching streams from DefaultLogger.
- detach the stream before deleting it in aiDetachAllLogStreams.
Thanks to Bart Botta for the patch.

- DefaultLogger does not properly delete log streams if they're still attached to it when the logger is destroyed. This is the behaviour specified in the documentation.
- Adapt AssimpView's logger usage, which didn't follow the spec as well.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@659 67173fc5-114c-0410-ac8e-9d2fd5bffc1f

code/Assimp.cpp

@@ -486,7 +486,9 @@ ASSIMP_API aiReturn aiDetachLogStream( const aiLogStream* stream)
 	if( it == gActiveLogStreams.end())	{
 		return AI_FAILURE;
 	}
+	DefaultLogger::get()->detatchStream( it->second );
 	delete it->second;
+
 	gActiveLogStreams.erase( it);
 
 	if (gActiveLogStreams.empty()) {
@@ -504,6 +506,7 @@ ASSIMP_API void aiDetachAllLogStreams(void)
 	boost::mutex::scoped_lock lock(gLogStreamMutex);
 #endif
 	for (LogStreamMap::iterator it = gActiveLogStreams.begin(); it != gActiveLogStreams.end(); ++it) {
+		DefaultLogger::get()->detatchStream( it->second );
 		delete it->second;
 	}
 	gActiveLogStreams.clear();

code/DefaultLogger.cpp

@@ -82,7 +82,7 @@ struct LogStreamInfo
 	// Destructor
 	~LogStreamInfo()
 	{
-		// empty
+		delete m_pStream;
 	}
 };
 
@@ -237,7 +237,7 @@ void DefaultLogger::kill()
 	boost::mutex::scoped_lock lock(loggerMutex);
 #endif
 
-	if (m_pLogger != &s_pNullLogger)return;
+	if (m_pLogger == &s_pNullLogger)return;
 	delete m_pLogger;
 	m_pLogger = &s_pNullLogger;
 }
@@ -332,6 +332,9 @@ bool DefaultLogger::detatchStream( LogStream *pStream, unsigned int severity )
 			(*it)->m_uiErrorSeverity &= ~severity;
 			if ( (*it)->m_uiErrorSeverity == 0 )
 			{
+				// don't delete the underlying stream 'cause the caller gains ownership again
+				(**it).m_pStream = NULL;
+				delete *it;
 				m_StreamArray.erase( it );
 				break;
 			}
@@ -356,9 +359,11 @@ DefaultLogger::DefaultLogger(LogSeverity severity)
 //	Destructor
 DefaultLogger::~DefaultLogger()
 {
-	for ( StreamIt it = m_StreamArray.begin(); it != m_StreamArray.end(); ++it )
+	for ( StreamIt it = m_StreamArray.begin(); it != m_StreamArray.end(); ++it ) {
+		// also frees the underlying stream, we are its owner.
 		delete *it;
 	}
+}
 
 // ----------------------------------------------------------------------------------
 //	Writes message to stream

include/Logger.h

@@ -124,8 +124,8 @@ public:
 	/** @brief	Attach a new logstream
 	 *
 	 *  The logger takes ownership of the stream and is responsible
-	 *  for its destruction (which is done when the logger itself 
-	 *  is destroyed). Call detachStream to detach a stream and to
+	 *  for its destruction (which is done using ::delete when the logger
+	 *  itself is destroyed). Call detachStream to detach a stream and to
 	 *  gain ownership of it again.
 	 *	 @param	pStream	 Logstream to attach
 	 *  @param severity  Message filter, specified which types of log

tools/assimp_view/LogWindow.h

@@ -48,7 +48,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *         log window.
 */
 //-------------------------------------------------------------------------------
-class CMyLogStream : Assimp::LogStream
+class CMyLogStream : public Assimp::LogStream
 {
 public:
 	/**	@brief	Implementation of the abstract method	*/
@@ -122,7 +122,7 @@ private:
 
 public:
 	// associated log stream
-	CMyLogStream pcStream;
+	CMyLogStream* pcStream;
 	};
 
 #endif // AV_LOG_DISPLA

tools/assimp_view/MessageProc.cpp

@@ -2214,7 +2214,9 @@ int APIENTRY _tWinMain(HINSTANCE hInstance,
 
 	// initialise the default logger if neccessary
 	Assimp::DefaultLogger::create("",Assimp::Logger::VERBOSE);
-	Assimp::DefaultLogger::get()->attachStream((Assimp::LogStream*)&CLogWindow::Instance().pcStream,
+
+	CLogWindow::Instance().pcStream = new CMyLogStream();
+	Assimp::DefaultLogger::get()->attachStream(CLogWindow::Instance().pcStream,
 		Assimp::DefaultLogger::DEBUGGING | Assimp::DefaultLogger::INFO |
 		Assimp::DefaultLogger::ERR | Assimp::DefaultLogger::WARN);