141 lines
3.9 KiB
C++
141 lines
3.9 KiB
C++
/**
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* @file lllfsthread.h
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* @brief LLLFSThread base class
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*
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* $LicenseInfo:firstyear=2000&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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#ifndef LL_LLLFSTHREAD_H
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#define LL_LLLFSTHREAD_H
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#include <queue>
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#include <string>
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#include <map>
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#include <set>
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#include "llpointer.h"
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#include "llqueuedthread.h"
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//============================================================================
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// Threaded Local File System
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//============================================================================
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class LLLFSThread : public LLQueuedThread
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{
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//------------------------------------------------------------------------
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public:
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enum operation_t {
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FILE_READ,
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FILE_WRITE,
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FILE_RENAME,
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FILE_REMOVE
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};
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//------------------------------------------------------------------------
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public:
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class Responder : public LLThreadSafeRefCount
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{
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protected:
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~Responder();
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public:
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virtual void completed(S32 bytes) = 0;
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};
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class Request : public QueuedRequest
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{
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protected:
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virtual ~Request(); // use deleteRequest()
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public:
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Request(LLLFSThread* thread,
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handle_t handle,
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operation_t op, const std::string& filename,
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U8* buffer, S32 offset, S32 numbytes,
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Responder* responder);
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S32 getBytes()
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{
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return mBytes;
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}
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S32 getBytesRead()
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{
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return mBytesRead;
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}
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S32 getOperation()
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{
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return mOperation;
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}
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U8* getBuffer()
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{
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return mBuffer;
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}
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const std::string& getFilename()
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{
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return mFileName;
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}
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/*virtual*/ bool processRequest();
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/*virtual*/ void finishRequest(bool completed);
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/*virtual*/ void deleteRequest();
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private:
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LLLFSThread* mThread;
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operation_t mOperation;
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std::string mFileName;
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U8* mBuffer; // dest for reads, source for writes, new UUID for rename
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S32 mOffset; // offset into file, -1 = append (WRITE only)
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S32 mBytes; // bytes to read from file, -1 = all
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S32 mBytesRead; // bytes read from file
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LLPointer<Responder> mResponder;
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};
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//------------------------------------------------------------------------
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public:
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LLLFSThread(bool threaded = true);
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~LLLFSThread();
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// Return a Request handle
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handle_t read(const std::string& filename, /* Flawfinder: ignore */
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U8* buffer, S32 offset, S32 numbytes,
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Responder* responder);
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handle_t write(const std::string& filename,
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U8* buffer, S32 offset, S32 numbytes,
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Responder* responder);
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// static initializers
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static void initClass(bool local_is_threaded = true); // Setup sLocal
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static S32 updateClass(U32 ms_elapsed);
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static void cleanupClass(); // Delete sLocal
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public:
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static LLLFSThread* sLocal; // Default local file thread
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};
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//============================================================================
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#endif // LL_LLLFSTHREAD_H
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