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/**
* @file lllfsthread.cpp
* @brief LLLFSThread base class
*
* Copyright (c) 2001-$CurrentYear$, Linden Research, Inc.
* $License$
*/
#include "linden_common.h"
#include "llmath.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, bool local_run_always)
{
llassert(sLocal == NULL);
sLocal = new LLLFSThread(local_is_threaded, local_run_always);
}
//static
S32 LLLFSThread::updateClass(U32 ms_elapsed)
{
sLocal->update(ms_elapsed);
return sLocal->getPending();
}
//static
void LLLFSThread::cleanupClass()
{
sLocal->setQuitting();
while (sLocal->getPending())
{
sLocal->update(0);
}
delete sLocal;
sLocal = 0;
}
//----------------------------------------------------------------------------
LLLFSThread::LLLFSThread(bool threaded, bool runalways) :
LLQueuedThread("LFS", threaded, runalways)
{
}
LLLFSThread::~LLLFSThread()
{
// ~LLQueuedThread() will be called here
}
//----------------------------------------------------------------------------
LLLFSThread::handle_t LLLFSThread::read(const LLString& filename, /* Flawfinder: ignore */
U8* buffer, S32 offset, S32 numbytes, U32 priority, U32 flags)
{
handle_t handle = generateHandle();
priority = llmax(priority, (U32)PRIORITY_LOW); // All reads are at least PRIORITY_LOW
Request* req = new Request(handle, priority, flags,
FILE_READ, filename,
buffer, offset, numbytes);
bool res = addRequest(req);
if (!res)
{
llerrs << "LLLFSThread::read called after LLLFSThread::cleanupClass()" << llendl;
req->deleteRequest();
handle = nullHandle();
}
return handle;
}
S32 LLLFSThread::readImmediate(const LLString& filename,
U8* buffer, S32 offset, S32 numbytes)
{
handle_t handle = generateHandle();
Request* req = new Request(handle, PRIORITY_IMMEDIATE, 0,
FILE_READ, filename,
buffer, offset, numbytes);
S32 res = addRequest(req) ? 1 : 0;
if (res == 0)
{
llerrs << "LLLFSThread::read called after LLLFSThread::cleanupClass()" << llendl;
req->deleteRequest();
}
else
{
llverify(waitForResult(handle, false) == true);
res = req->getBytesRead();
completeRequest(handle);
}
return res;
}
LLLFSThread::handle_t LLLFSThread::write(const LLString& filename,
U8* buffer, S32 offset, S32 numbytes, U32 flags)
{
handle_t handle = generateHandle();
Request* req = new Request(handle, 0, flags,
FILE_WRITE, filename,
buffer, offset, numbytes);
bool res = addRequest(req);
if (!res)
{
llerrs << "LLLFSThread::read called after LLLFSThread::cleanupClass()" << llendl;
req->deleteRequest();
handle = nullHandle();
}
return handle;
}
S32 LLLFSThread::writeImmediate(const LLString& filename,
U8* buffer, S32 offset, S32 numbytes)
{
handle_t handle = generateHandle();
Request* req = new Request(handle, PRIORITY_IMMEDIATE, 0,
FILE_WRITE, filename,
buffer, offset, numbytes);
S32 res = addRequest(req) ? 1 : 0;
if (res == 0)
{
llerrs << "LLLFSThread::write called after LLLFSThread::cleanupClass()" << llendl;
req->deleteRequest();
}
else
{
llverify(waitForResult(handle, false) == true);
res = req->getBytesRead();
completeRequest(handle);
}
return res;
}
LLLFSThread::handle_t LLLFSThread::rename(const LLString& filename, const LLString& newname, U32 flags)
{
handle_t handle = generateHandle();
LLString* new_name_str = new LLString(newname); // deleted with Request
Request* req = new Request(handle, 0, flags,
FILE_RENAME, filename,
(U8*)new_name_str, 0, 0);
bool res = addRequest(req);
if (!res)
{
llerrs << "LLLFSThread::rename called after LLLFSThread::cleanupClass()" << llendl;
req->deleteRequest();
handle = nullHandle();
}
return handle;
}
LLLFSThread::handle_t LLLFSThread::remove(const LLString& filename, U32 flags)
{
handle_t handle = generateHandle();
Request* req = new Request(handle, 0, flags,
FILE_RENAME, filename,
NULL, 0, 0);
bool res = addRequest(req);
if (!res)
{
llerrs << "LLLFSThread::remove called after LLLFSThread::cleanupClass()" << llendl;
req->deleteRequest();
handle = nullHandle();
}
return handle;
}
//============================================================================
// Runs on its OWN thread
bool LLLFSThread::processRequest(QueuedRequest* qreq)
{
Request *req = (Request*)qreq;
bool complete = req->processIO();
return complete;
}
//============================================================================
LLLFSThread::Request::Request(handle_t handle, U32 priority, U32 flags,
operation_t op, const LLString& filename,
U8* buffer, S32 offset, S32 numbytes) :
QueuedRequest(handle, priority, flags),
mOperation(op),
mFileName(filename),
mBuffer(buffer),
mOffset(offset),
mBytes(numbytes),
mBytesRead(0)
{
llassert(mBuffer);
if (numbytes <= 0 && mOperation != FILE_RENAME && mOperation != FILE_REMOVE)
{
llwarns << "LLLFSThread: Request with numbytes = " << numbytes << llendl;
}
}
void LLLFSThread::Request::finishRequest()
{
}
void LLLFSThread::Request::deleteRequest()
{
if (getStatus() == STATUS_QUEUED || getStatus() == STATUS_ABORT)
{
llerrs << "Attempt to delete a queued LLLFSThread::Request!" << llendl;
}
if (mOperation == FILE_WRITE)
{
if (mFlags & AUTO_DELETE)
{
delete mBuffer;
}
}
else if (mOperation == FILE_RENAME)
{
LLString* new_name = (LLString*)mBuffer;
delete new_name;
}
LLQueuedThread::QueuedRequest::deleteRequest();
}
bool LLLFSThread::Request::processIO()
{
bool complete = false;
if (mOperation == FILE_READ)
{
llassert(mOffset >= 0);
apr_file_t* filep = ll_apr_file_open(mFileName, LL_APR_RB);
if (!filep)
{
llwarns << "LLLFS: Unable to read file: " << mFileName << llendl;
mBytesRead = 0; // fail
return true;
}
if (mOffset < 0)
ll_apr_file_seek(filep, APR_END, 0);
else
ll_apr_file_seek(filep, APR_SET, mOffset);
mBytesRead = ll_apr_file_read(filep, mBuffer, mBytes );
apr_file_close(filep);
complete = true;
//llinfos << llformat("LLLFSThread::READ '%s': %d bytes",mFileName.c_str(),mBytesRead) << llendl;
}
else if (mOperation == FILE_WRITE)
{
apr_file_t* filep = ll_apr_file_open(mFileName, LL_APR_WB);
if (!filep)
{
llwarns << "LLLFS: Unable to write file: " << mFileName << llendl;
mBytesRead = 0; // fail
return true;
}
if (mOffset < 0)
ll_apr_file_seek(filep, APR_END, 0);
else
ll_apr_file_seek(filep, APR_SET, mOffset);
mBytesRead = ll_apr_file_write(filep, mBuffer, mBytes );
complete = true;
apr_file_close(filep);
//llinfos << llformat("LLLFSThread::WRITE '%s': %d bytes",mFileName.c_str(),mBytesRead) << llendl;
}
else if (mOperation == FILE_RENAME)
{
LLString* new_name = (LLString*)mBuffer;
ll_apr_file_rename(mFileName, *new_name);
complete = true;
//llinfos << llformat("LLLFSThread::RENAME '%s': '%s'",mFileName.c_str(),new_name->c_str()) << llendl;
}
else if (mOperation == FILE_REMOVE)
{
ll_apr_file_remove(mFileName);
complete = true;
//llinfos << llformat("LLLFSThread::REMOVE '%s'",mFileName.c_str()) << llendl;
}
else
{
llerrs << llformat("LLLFSThread::unknown operation: %d", mOperation) << llendl;
}
return complete;
}
//============================================================================
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