The folder where the disk cache lives was originally renamed from llvfs to llcache but @henri's suggestion that that doesn't reflect the other files in the same place and it should be llfilesystem is a good one so I changed it over

1 files changed, 245 insertions, 0 deletions

diff --git a/indra/llfilesystem/lllfsthread.cpp b/indra/llfilesystem/lllfsthread.cpp
new file mode 100644
index 0000000000..be8e83a56f
--- /dev/null
+++ b/indra/llfilesystem/lllfsthread.cpp
@@ -0,0 +1,245 @@
+/** 
+ * @file lllfsthread.cpp
+ * @brief LLLFSThread base class
+ *
+ * $LicenseInfo:firstyear=2001&license=viewerlgpl$
+ * 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
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+#include "lllfsthread.h"
+#include "llstl.h"
+#include "llapr.h"
+
+//============================================================================
+
+/*static*/ LLLFSThread* LLLFSThread::sLocal = NULL;
+
+//============================================================================
+// Run on MAIN thread
+//static
+void LLLFSThread::initClass(bool local_is_threaded)
+{
+	llassert(sLocal == NULL);
+	sLocal = new LLLFSThread(local_is_threaded);
+}
+
+//static
+S32 LLLFSThread::updateClass(U32 ms_elapsed)
+{
+	sLocal->update((F32)ms_elapsed);
+	return sLocal->getPending();
+}
+
+//static
+void LLLFSThread::cleanupClass()
+{
+	llassert(sLocal != NULL);
+	sLocal->setQuitting();
+	while (sLocal->getPending())
+	{
+		sLocal->update(0);
+	}
+	delete sLocal;
+	sLocal = NULL;
+}
+
+//----------------------------------------------------------------------------
+
+LLLFSThread::LLLFSThread(bool threaded) :
+	LLQueuedThread("LFS", threaded),
+	mPriorityCounter(PRIORITY_LOWBITS)
+{
+	if(!mLocalAPRFilePoolp)
+	{
+		mLocalAPRFilePoolp = new LLVolatileAPRPool() ;
+	}
+}
+
+LLLFSThread::~LLLFSThread()
+{
+	// mLocalAPRFilePoolp cleanup in LLThread
+	// ~LLQueuedThread() will be called here
+}
+
+//----------------------------------------------------------------------------
+
+LLLFSThread::handle_t LLLFSThread::read(const std::string& filename,	/* Flawfinder: ignore */ 
+										U8* buffer, S32 offset, S32 numbytes,
+										Responder* responder, U32 priority)
+{
+	handle_t handle = generateHandle();
+
+	if (priority == 0) priority = PRIORITY_NORMAL | priorityCounter();
+	else if (priority < PRIORITY_LOW) priority |= PRIORITY_LOW; // All reads are at least PRIORITY_LOW
+
+	Request* req = new Request(this, handle, priority,
+							   FILE_READ, filename,
+							   buffer, offset, numbytes,
+							   responder);
+
+	bool res = addRequest(req);
+	if (!res)
+	{
+		LL_ERRS() << "LLLFSThread::read called after LLLFSThread::cleanupClass()" << LL_ENDL;
+	}
+
+	return handle;
+}
+
+LLLFSThread::handle_t LLLFSThread::write(const std::string& filename,
+										 U8* buffer, S32 offset, S32 numbytes,
+										 Responder* responder, U32 priority)
+{
+	handle_t handle = generateHandle();
+
+	if (priority == 0) priority = PRIORITY_LOW | priorityCounter();
+	
+	Request* req = new Request(this, handle, priority,
+							   FILE_WRITE, filename,
+							   buffer, offset, numbytes,
+							   responder);
+
+	bool res = addRequest(req);
+	if (!res)
+	{
+		LL_ERRS() << "LLLFSThread::read called after LLLFSThread::cleanupClass()" << LL_ENDL;
+	}
+	
+	return handle;
+}
+
+//============================================================================
+
+LLLFSThread::Request::Request(LLLFSThread* thread,
+							  handle_t handle, U32 priority,
+							  operation_t op, const std::string& filename,
+							  U8* buffer, S32 offset, S32 numbytes,
+							  Responder* responder) :
+	QueuedRequest(handle, priority, FLAG_AUTO_COMPLETE),
+	mThread(thread),
+	mOperation(op),
+	mFileName(filename),
+	mBuffer(buffer),
+	mOffset(offset),
+	mBytes(numbytes),
+	mBytesRead(0),
+	mResponder(responder)
+{
+	if (numbytes <= 0)
+	{
+		LL_WARNS() << "LLLFSThread: Request with numbytes = " << numbytes << LL_ENDL;
+	}
+}
+
+LLLFSThread::Request::~Request()
+{
+}
+
+// virtual, called from own thread
+void LLLFSThread::Request::finishRequest(bool completed)
+{
+	if (mResponder.notNull())
+	{
+		mResponder->completed(completed ? mBytesRead : 0);
+		mResponder = NULL;
+	}
+}
+
+void LLLFSThread::Request::deleteRequest()
+{
+	if (getStatus() == STATUS_QUEUED)
+	{
+		LL_ERRS() << "Attempt to delete a queued LLLFSThread::Request!" << LL_ENDL;
+	}	
+	if (mResponder.notNull())
+	{
+		mResponder->completed(0);
+		mResponder = NULL;
+	}
+	LLQueuedThread::QueuedRequest::deleteRequest();
+}
+
+bool LLLFSThread::Request::processRequest()
+{
+	bool complete = false;
+	if (mOperation ==  FILE_READ)
+	{
+		llassert(mOffset >= 0);
+		LLAPRFile infile ; // auto-closes
+		infile.open(mFileName, LL_APR_RB, mThread->getLocalAPRFilePool());
+		if (!infile.getFileHandle())
+		{
+			LL_WARNS() << "LLLFS: Unable to read file: " << mFileName << LL_ENDL;
+			mBytesRead = 0; // fail
+			return true;
+		}
+		S32 off;
+		if (mOffset < 0)
+			off = infile.seek(APR_END, 0);
+		else
+			off = infile.seek(APR_SET, mOffset);
+		llassert_always(off >= 0);
+		mBytesRead = infile.read(mBuffer, mBytes );
+		complete = true;
+// 		LL_INFOS() << "LLLFSThread::READ:" << mFileName << " Bytes: " << mBytesRead << LL_ENDL;
+	}
+	else if (mOperation ==  FILE_WRITE)
+	{
+		apr_int32_t flags = APR_CREATE|APR_WRITE|APR_BINARY;
+		if (mOffset < 0)
+			flags |= APR_APPEND;
+		LLAPRFile outfile ; // auto-closes
+		outfile.open(mFileName, flags, mThread->getLocalAPRFilePool());
+		if (!outfile.getFileHandle())
+		{
+			LL_WARNS() << "LLLFS: Unable to write file: " << mFileName << LL_ENDL;
+			mBytesRead = 0; // fail
+			return true;
+		}
+		if (mOffset >= 0)
+		{
+			S32 seek = outfile.seek(APR_SET, mOffset);
+			if (seek < 0)
+			{
+				LL_WARNS() << "LLLFS: Unable to write file (seek failed): " << mFileName << LL_ENDL;
+				mBytesRead = 0; // fail
+				return true;
+			}
+		}
+		mBytesRead = outfile.write(mBuffer, mBytes );
+		complete = true;
+// 		LL_INFOS() << "LLLFSThread::WRITE:" << mFileName << " Bytes: " << mBytesRead << "/" << mBytes << " Offset:" << mOffset << LL_ENDL;
+	}
+	else
+	{
+		LL_ERRS() << "LLLFSThread::unknown operation: " << (S32)mOperation << LL_ENDL;
+	}
+	return complete;
+}
+
+//============================================================================
+
+LLLFSThread::Responder::~Responder()
+{
+}
+
+//============================================================================