Merged in DV546-merge-6.5.2 (pull request #814)

DRTVWR-546 merge up to 6.5.2

1 files changed, 147 insertions, 0 deletions

diff --git a/indra/llfilesystem/lllfsthread.h b/indra/llfilesystem/lllfsthread.h
new file mode 100644
index 0000000000..58f658f7ba
--- /dev/null
+++ b/indra/llfilesystem/lllfsthread.h
@@ -0,0 +1,147 @@
+/** 
+ * @file lllfsthread.h
+ * @brief LLLFSThread base class
+ *
+ * $LicenseInfo:firstyear=2000&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library 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
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLLFSTHREAD_H
+#define LL_LLLFSTHREAD_H
+
+#include <queue>
+#include <string>
+#include <map>
+#include <set>
+
+#include "llpointer.h"
+#include "llqueuedthread.h"
+
+//============================================================================
+// Threaded Local File System
+//============================================================================
+
+class LLLFSThread : public LLQueuedThread
+{
+	//------------------------------------------------------------------------
+public:
+	enum operation_t {
+		FILE_READ,
+		FILE_WRITE,
+		FILE_RENAME,
+		FILE_REMOVE
+	};
+
+	//------------------------------------------------------------------------
+public:
+
+	class Responder : public LLThreadSafeRefCount
+	{
+	protected:
+		~Responder();
+	public:
+		virtual void completed(S32 bytes) = 0;
+	};
+
+	class Request : public QueuedRequest
+	{
+	protected:
+		virtual ~Request(); // use deleteRequest()
+		
+	public:
+		Request(LLLFSThread* thread,
+				handle_t handle, U32 priority, 
+				operation_t op, const std::string& filename,
+				U8* buffer, S32 offset, S32 numbytes,
+				Responder* responder);
+
+		S32 getBytes()
+		{
+			return mBytes;
+		}
+		S32 getBytesRead()
+		{
+			return mBytesRead;
+		}
+		S32 getOperation()
+		{
+			return mOperation;
+		}
+		U8* getBuffer()
+		{
+			return mBuffer;
+		}
+		const std::string& getFilename()
+		{
+			return mFileName;
+		}
+		
+		/*virtual*/ bool processRequest();
+		/*virtual*/ void finishRequest(bool completed);
+		/*virtual*/ void deleteRequest();
+		
+	private:
+		LLLFSThread* mThread;
+		operation_t mOperation;
+		
+		std::string mFileName;
+		
+		U8* mBuffer;	// dest for reads, source for writes, new UUID for rename
+		S32 mOffset;	// offset into file, -1 = append (WRITE only)
+		S32 mBytes;		// bytes to read from file, -1 = all
+		S32 mBytesRead;	// bytes read from file
+
+		LLPointer<Responder> mResponder;
+	};
+
+	//------------------------------------------------------------------------
+public:
+	LLLFSThread(bool threaded = TRUE);
+	~LLLFSThread();	
+
+	// Return a Request handle
+	handle_t read(const std::string& filename,	/* Flawfinder: ignore */ 
+				  U8* buffer, S32 offset, S32 numbytes,
+				  Responder* responder, U32 pri=0);
+	handle_t write(const std::string& filename,
+				   U8* buffer, S32 offset, S32 numbytes,
+				   Responder* responder, U32 pri=0);
+	
+	// Misc
+	U32 priorityCounter() { return mPriorityCounter-- & PRIORITY_LOWBITS; } // Use to order IO operations
+	
+	// static initializers
+	static void initClass(bool local_is_threaded = TRUE); // Setup sLocal
+	static S32 updateClass(U32 ms_elapsed);
+	static void cleanupClass();		// Delete sLocal
+
+	
+private:
+	U32 mPriorityCounter;
+	
+public:
+	static LLLFSThread* sLocal;		// Default local file thread
+};
+
+//============================================================================
+
+
+#endif // LL_LLLFSTHREAD_H