4 files changed, 22 insertions, 13 deletions
diff --git a/source/OSSupport/File.cpp b/source/OSSupport/File.cpp
index cc0916711..a4c9a22f4 100644
--- a/source/OSSupport/File.cpp
+++ b/source/OSSupport/File.cpp
@@ -287,6 +287,21 @@ bool cFile::Rename(const AString & a_OrigFileName, const AString & a_NewFileName
 
 
 
+bool cFile::IsFolder(const AString & a_Path)
+{
+	#ifdef _WIN32
+	DWORD FileAttrib = GetFileAttributes(a_Path.c_str());
+	return ((FileAttrib != INVALID_FILE_ATTRIBUTES) && ((FileAttrib & FILE_ATTRIBUTE_DIRECTORY) != 0));
+	#else
+	struct stat st;
+	return ((stat(a_Path.c_str(), &st) == 0) && S_ISDIR(st.st_mode));
+	#endif
+}
+
+
+
+
+
 int cFile::Printf(const char * a_Fmt, ...)
 {
 	AString buf;
diff --git a/source/OSSupport/File.h b/source/OSSupport/File.h
index 8a057afa8..d4ea0d3a8 100644
--- a/source/OSSupport/File.h
+++ b/source/OSSupport/File.h
@@ -99,6 +99,9 @@ public:
 	/// Renames a file, returns true if successful. May fail if dest already exists (libc-dependant)!
 	static bool Rename(const AString & a_OrigFileName, const AString & a_NewFileName);
 	
+	/// Returns true if the specified path is a folder
+	static bool IsFolder(const AString & a_Path);
+	
 	int Printf(const char * a_Fmt, ...);
 	
 private:
diff --git a/source/OSSupport/IsThread.cpp b/source/OSSupport/IsThread.cpp
index d5fbfcf19..e1ef84c17 100644
--- a/source/OSSupport/IsThread.cpp
+++ b/source/OSSupport/IsThread.cpp
@@ -53,11 +53,7 @@ static void SetThreadName( DWORD dwThreadID, LPCSTR szThreadName)
 cIsThread::cIsThread(const AString & iThreadName) :
 	m_ThreadName(iThreadName),
 	m_ShouldTerminate(false),
-	#ifdef _WIN32
-		m_Handle(NULL)
-	#else  // _WIN32
-		m_HasStarted(false)
-	#endif  // else _WIN32
+	m_Handle(NULL)
 {
 }
 
@@ -77,9 +73,9 @@ cIsThread::~cIsThread()
 
 bool cIsThread::Start(void)
 {
+	ASSERT(m_Handle == NULL);  // Has already started one thread?
+	
 	#ifdef _WIN32
-		ASSERT(m_Handle == NULL);  // Has already started one thread?
-		
 		// Create the thread suspended, so that the mHandle variable is valid in the thread procedure
 		DWORD ThreadID = 0;
 		m_Handle = CreateThread(NULL, 0, thrExecute, this, CREATE_SUSPENDED, &ThreadID);
@@ -99,14 +95,11 @@ bool cIsThread::Start(void)
 		#endif  // _DEBUG and _MSC_VER
 		
 	#else  // _WIN32
-		ASSERT(!m_HasStarted);
-		
 		if (pthread_create(&m_Handle, NULL, thrExecute, this))
 		{
 			LOGERROR("ERROR: Could not create thread \"%s\", !", m_ThreadName.c_str());
 			return false;
 		}
-		m_HasStarted = true;
 	#endif  // else _WIN32
 
 	return true;
@@ -158,7 +151,6 @@ bool cIsThread::Wait(void)
 			LOGD("Thread %s finished", m_ThreadName.c_str());
 		#endif  // LOGD
 		
-		m_HasStarted = false;
 		return (res == 0);
 	#endif  // else _WIN32
 }
diff --git a/source/OSSupport/IsThread.h b/source/OSSupport/IsThread.h
index 9b7f0b73e..2ea8bf6f9 100644
--- a/source/OSSupport/IsThread.h
+++ b/source/OSSupport/IsThread.h
@@ -48,7 +48,7 @@ public:
 	/// Returns the OS-dependent thread ID for the caller's thread
 	static unsigned long GetCurrentID(void);
 
-private:
+protected:
 	AString m_ThreadName;
 	
 	#ifdef _WIN32
@@ -66,7 +66,6 @@ private:
 	#else  // _WIN32
 	
 		pthread_t m_Handle;
-		bool      m_HasStarted;
 		
 		static void * thrExecute(void * a_Param)
 		{