1 files changed, 50 insertions, 0 deletions
diff --git a/lib/common/NamedLock.h b/lib/common/NamedLock.h
new file mode 100644
index 00000000..a7d0d778
--- /dev/null
+++ b/lib/common/NamedLock.h
@@ -0,0 +1,50 @@
+// --------------------------------------------------------------------------
+//
+// File
+//		Name:    NamedLock.h
+//		Purpose: A global named lock, implemented as a lock file in file system
+//		Created: 2003/08/28
+//
+// --------------------------------------------------------------------------
+
+#ifndef NAMEDLOCK__H
+#define NAMEDLOCK__H
+
+// --------------------------------------------------------------------------
+//
+// Class
+//		Name:    NamedLock
+//		Purpose: A global named lock, implemented as a lock file in file system
+//		Created: 2003/08/28
+//
+// --------------------------------------------------------------------------
+class NamedLock
+{
+public:
+	NamedLock();
+	~NamedLock();
+private:
+	// No copying allowed
+	NamedLock(const NamedLock &);
+
+public:
+	bool TryAndGetLock(const std::string& rFilename, int mode = 0755);
+# ifdef WIN32
+	bool GotLock() {return mFileDescriptor != INVALID_HANDLE_VALUE;}
+# else
+	bool GotLock() {return mFileDescriptor != -1;}
+# endif
+	void ReleaseLock();
+	
+private:
+# ifdef WIN32
+	HANDLE mFileDescriptor;
+# else
+	int mFileDescriptor;
+# endif
+
+	std::string mFileName;
+};
+
+#endif // NAMEDLOCK__H
+