301 lines
8.2 KiB
C++
301 lines
8.2 KiB
C++
/**
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* @file llvfsthread.cpp
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* @brief LLVFSThread implementation
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*
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* $LicenseInfo:firstyear=2001&license=viewerlgpl$
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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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#include "linden_common.h"
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#include "llvfsthread.h"
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#include "llstl.h"
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//============================================================================
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/*static*/ std::string LLVFSThread::sDataPath = "";
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/*static*/ LLVFSThread* LLVFSThread::sLocal = NULL;
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//============================================================================
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// Run on MAIN thread
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//static
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void LLVFSThread::initClass(bool local_is_threaded)
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{
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llassert(sLocal == NULL);
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sLocal = new LLVFSThread(local_is_threaded);
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}
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//static
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S32 LLVFSThread::updateClass(U32 ms_elapsed)
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{
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sLocal->update((F32)ms_elapsed);
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return sLocal->getPending();
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}
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//static
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void LLVFSThread::cleanupClass()
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{
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sLocal->setQuitting();
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while (sLocal->getPending())
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{
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sLocal->update(0);
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}
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delete sLocal;
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sLocal = 0;
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}
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//----------------------------------------------------------------------------
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LLVFSThread::LLVFSThread(bool threaded) :
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LLQueuedThread("VFS", threaded)
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{
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}
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LLVFSThread::~LLVFSThread()
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{
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// ~LLQueuedThread() will be called here
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}
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//----------------------------------------------------------------------------
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LLVFSThread::handle_t LLVFSThread::read(LLVFS* vfs, const LLUUID &file_id, const LLAssetType::EType file_type,
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U8* buffer, S32 offset, S32 numbytes, U32 priority, U32 flags)
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{
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handle_t handle = generateHandle();
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priority = llmax(priority, (U32)PRIORITY_LOW); // All reads are at least PRIORITY_LOW
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Request* req = new Request(handle, priority, flags, FILE_READ, vfs, file_id, file_type,
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buffer, offset, numbytes);
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bool res = addRequest(req);
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if (!res)
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{
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LL_ERRS() << "LLVFSThread::read called after LLVFSThread::cleanupClass()" << LL_ENDL;
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req->deleteRequest();
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handle = nullHandle();
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}
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return handle;
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}
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S32 LLVFSThread::readImmediate(LLVFS* vfs, const LLUUID &file_id, const LLAssetType::EType file_type,
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U8* buffer, S32 offset, S32 numbytes)
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{
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handle_t handle = generateHandle();
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Request* req = new Request(handle, PRIORITY_IMMEDIATE, 0, FILE_READ, vfs, file_id, file_type,
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buffer, offset, numbytes);
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S32 res = addRequest(req) ? 1 : 0;
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if (res == 0)
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{
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LL_ERRS() << "LLVFSThread::read called after LLVFSThread::cleanupClass()" << LL_ENDL;
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req->deleteRequest();
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}
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else
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{
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llverify(waitForResult(handle, false) == true);
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res = req->getBytesRead();
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completeRequest(handle);
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}
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return res;
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}
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LLVFSThread::handle_t LLVFSThread::write(LLVFS* vfs, const LLUUID &file_id, const LLAssetType::EType file_type,
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U8* buffer, S32 offset, S32 numbytes, U32 flags)
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{
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handle_t handle = generateHandle();
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Request* req = new Request(handle, 0, flags, FILE_WRITE, vfs, file_id, file_type,
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buffer, offset, numbytes);
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bool res = addRequest(req);
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if (!res)
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{
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LL_ERRS() << "LLVFSThread::read called after LLVFSThread::cleanupClass()" << LL_ENDL;
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req->deleteRequest();
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handle = nullHandle();
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}
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return handle;
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}
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S32 LLVFSThread::writeImmediate(LLVFS* vfs, const LLUUID &file_id, const LLAssetType::EType file_type,
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U8* buffer, S32 offset, S32 numbytes)
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{
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handle_t handle = generateHandle();
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Request* req = new Request(handle, PRIORITY_IMMEDIATE, 0, FILE_WRITE, vfs, file_id, file_type,
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buffer, offset, numbytes);
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S32 res = addRequest(req) ? 1 : 0;
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if (res == 0)
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{
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LL_ERRS() << "LLVFSThread::read called after LLVFSThread::cleanupClass()" << LL_ENDL;
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req->deleteRequest();
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}
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else
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{
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llverify(waitForResult(handle, false) == true);
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res = req->getBytesRead();
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completeRequest(handle);
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}
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return res;
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}
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// LLVFSThread::handle_t LLVFSThread::rename(LLVFS* vfs, const LLUUID &file_id, const LLAssetType::EType file_type,
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// const LLUUID &new_id, const LLAssetType::EType new_type, U32 flags)
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// {
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// handle_t handle = generateHandle();
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// LLUUID* new_idp = new LLUUID(new_id); // deleted with Request
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// // new_type is passed as "numbytes"
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// Request* req = new Request(handle, 0, flags, FILE_RENAME, vfs, file_id, file_type,
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// (U8*)new_idp, 0, (S32)new_type);
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// bool res = addRequest(req);
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// if (!res)
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// {
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// LL_ERRS() << "LLVFSThread::read called after LLVFSThread::cleanupClass()" << LL_ENDL;
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// req->deleteRequest();
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// handle = nullHandle();
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// }
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// return handle;
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// }
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//============================================================================
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LLVFSThread::Request::Request(handle_t handle, U32 priority, U32 flags,
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operation_t op, LLVFS* vfs,
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const LLUUID &file_id, const LLAssetType::EType file_type,
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U8* buffer, S32 offset, S32 numbytes) :
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QueuedRequest(handle, priority, flags),
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mOperation(op),
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mVFS(vfs),
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mFileID(file_id),
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mFileType(file_type),
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mBuffer(buffer),
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mOffset(offset),
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mBytes(numbytes),
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mBytesRead(0)
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{
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llassert(mBuffer);
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if (numbytes <= 0 && mOperation != FILE_RENAME)
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{
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LL_WARNS() << "LLVFSThread: Request with numbytes = " << numbytes
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<< " operation = " << op
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<< " offset " << offset
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<< " file_type " << file_type << LL_ENDL;
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}
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if (mOperation == FILE_WRITE)
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{
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S32 blocksize = mVFS->getMaxSize(mFileID, mFileType);
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if (blocksize < 0)
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{
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LL_WARNS() << "VFS write to temporary block (shouldn't happen)" << LL_ENDL;
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}
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mVFS->incLock(mFileID, mFileType, VFSLOCK_APPEND);
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}
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else if (mOperation == FILE_RENAME)
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{
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mVFS->incLock(mFileID, mFileType, VFSLOCK_APPEND);
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}
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else // if (mOperation == FILE_READ)
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{
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mVFS->incLock(mFileID, mFileType, VFSLOCK_READ);
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}
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}
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// dec locks as soon as a request finishes
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void LLVFSThread::Request::finishRequest(bool completed)
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{
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if (mOperation == FILE_WRITE)
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{
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mVFS->decLock(mFileID, mFileType, VFSLOCK_APPEND);
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}
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else if (mOperation == FILE_RENAME)
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{
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mVFS->decLock(mFileID, mFileType, VFSLOCK_APPEND);
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}
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else // if (mOperation == FILE_READ)
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{
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mVFS->decLock(mFileID, mFileType, VFSLOCK_READ);
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}
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}
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void LLVFSThread::Request::deleteRequest()
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{
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if (getStatus() == STATUS_QUEUED)
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{
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LL_ERRS() << "Attempt to delete a queued LLVFSThread::Request!" << LL_ENDL;
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}
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if (mOperation == FILE_WRITE)
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{
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if (mFlags & FLAG_AUTO_DELETE)
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{
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delete [] mBuffer;
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}
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}
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else if (mOperation == FILE_RENAME)
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{
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LLUUID* new_idp = (LLUUID*)mBuffer;
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delete new_idp;
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}
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LLQueuedThread::QueuedRequest::deleteRequest();
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}
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bool LLVFSThread::Request::processRequest()
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{
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bool complete = false;
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if (mOperation == FILE_READ)
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{
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llassert(mOffset >= 0);
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mBytesRead = mVFS->getData(mFileID, mFileType, mBuffer, mOffset, mBytes);
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complete = true;
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//LL_INFOS() << llformat("LLVFSThread::READ '%s': %d bytes arg:%d",getFilename(),mBytesRead) << LL_ENDL;
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}
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else if (mOperation == FILE_WRITE)
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{
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mBytesRead = mVFS->storeData(mFileID, mFileType, mBuffer, mOffset, mBytes);
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complete = true;
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//LL_INFOS() << llformat("LLVFSThread::WRITE '%s': %d bytes arg:%d",getFilename(),mBytesRead) << LL_ENDL;
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}
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else if (mOperation == FILE_RENAME)
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{
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LLUUID* new_idp = (LLUUID*)mBuffer;
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LLAssetType::EType new_type = (LLAssetType::EType)mBytes;
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mVFS->renameFile(mFileID, mFileType, *new_idp, new_type);
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mFileID = *new_idp;
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complete = true;
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//LL_INFOS() << llformat("LLVFSThread::RENAME '%s': %d bytes arg:%d",getFilename(),mBytesRead) << LL_ENDL;
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}
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else
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{
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LL_ERRS() << llformat("LLVFSThread::unknown operation: %d", mOperation) << LL_ENDL;
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}
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return complete;
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}
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//============================================================================
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