740 lines
15 KiB
C++
740 lines
15 KiB
C++
/**
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* @file llapr.cpp
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* @author Phoenix
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* @date 2004-11-28
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* @brief Helper functions for using the apache portable runtime library.
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*
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* $LicenseInfo:firstyear=2004&license=viewerlgpl$
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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 "llapr.h"
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#include "llmutex.h"
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#include "apr_dso.h"
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apr_pool_t *gAPRPoolp = NULL; // Global APR memory pool
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LLVolatileAPRPool *LLAPRFile::sAPRFilePoolp = NULL ; //global volatile APR memory pool.
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const S32 FULL_VOLATILE_APR_POOL = 1024 ; //number of references to LLVolatileAPRPool
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bool gAPRInitialized = false;
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void ll_init_apr()
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{
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// Initialize APR and create the global pool
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apr_initialize();
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if (!gAPRPoolp)
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{
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apr_pool_create(&gAPRPoolp, NULL);
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}
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if(!LLAPRFile::sAPRFilePoolp)
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{
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LLAPRFile::sAPRFilePoolp = new LLVolatileAPRPool(FALSE) ;
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}
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gAPRInitialized = true;
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}
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bool ll_apr_is_initialized()
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{
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return gAPRInitialized;
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}
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void ll_cleanup_apr()
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{
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gAPRInitialized = false;
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LL_DEBUGS("APR") << "Cleaning up APR" << LL_ENDL;
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if (gAPRPoolp)
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{
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apr_pool_destroy(gAPRPoolp);
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gAPRPoolp = NULL;
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}
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if (LLAPRFile::sAPRFilePoolp)
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{
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delete LLAPRFile::sAPRFilePoolp ;
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LLAPRFile::sAPRFilePoolp = NULL ;
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}
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apr_terminate();
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}
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//
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//
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//LLAPRPool
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//
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LLAPRPool::LLAPRPool(apr_pool_t *parent, apr_size_t size, BOOL releasePoolFlag)
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: mParent(parent),
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mReleasePoolFlag(releasePoolFlag),
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mMaxSize(size),
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mPool(NULL)
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{
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createAPRPool() ;
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}
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LLAPRPool::~LLAPRPool()
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{
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releaseAPRPool() ;
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}
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void LLAPRPool::createAPRPool()
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{
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if(mPool)
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{
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return ;
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}
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mStatus = apr_pool_create(&mPool, mParent);
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ll_apr_warn_status(mStatus) ;
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if(mMaxSize > 0) //size is the number of blocks (which is usually 4K), NOT bytes.
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{
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apr_allocator_t *allocator = apr_pool_allocator_get(mPool);
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if (allocator)
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{
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apr_allocator_max_free_set(allocator, mMaxSize) ;
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}
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}
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}
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void LLAPRPool::releaseAPRPool()
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{
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if(!mPool)
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{
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return ;
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}
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if(!mParent || mReleasePoolFlag)
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{
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apr_pool_destroy(mPool) ;
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mPool = NULL ;
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}
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}
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//virtual
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apr_pool_t* LLAPRPool::getAPRPool()
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{
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return mPool ;
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}
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LLVolatileAPRPool::LLVolatileAPRPool(BOOL is_local, apr_pool_t *parent, apr_size_t size, BOOL releasePoolFlag)
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: LLAPRPool(parent, size, releasePoolFlag),
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mNumActiveRef(0),
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mNumTotalRef(0)
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{
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//create mutex
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if(!is_local) //not a local apr_pool, that is: shared by multiple threads.
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{
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mMutexp.reset(new std::mutex());
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}
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}
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LLVolatileAPRPool::~LLVolatileAPRPool()
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{
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//delete mutex
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mMutexp.reset();
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}
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//
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//define this virtual function to avoid any mistakenly calling LLAPRPool::getAPRPool().
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//
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//virtual
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apr_pool_t* LLVolatileAPRPool::getAPRPool()
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{
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return LLVolatileAPRPool::getVolatileAPRPool() ;
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}
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apr_pool_t* LLVolatileAPRPool::getVolatileAPRPool()
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{
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LLScopedLock lock(mMutexp.get()) ;
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mNumTotalRef++ ;
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mNumActiveRef++ ;
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if(!mPool)
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{
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createAPRPool() ;
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}
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return mPool ;
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}
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void LLVolatileAPRPool::clearVolatileAPRPool()
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{
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LLScopedLock lock(mMutexp.get());
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if(mNumActiveRef > 0)
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{
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mNumActiveRef--;
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if(mNumActiveRef < 1)
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{
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if(isFull())
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{
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mNumTotalRef = 0 ;
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//destroy the apr_pool.
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releaseAPRPool() ;
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}
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else
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{
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//This does not actually free the memory,
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//it just allows the pool to re-use this memory for the next allocation.
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apr_pool_clear(mPool) ;
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}
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}
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}
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else
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{
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llassert_always(mNumActiveRef > 0) ;
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}
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llassert(mNumTotalRef <= (FULL_VOLATILE_APR_POOL << 2)) ;
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}
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BOOL LLVolatileAPRPool::isFull()
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{
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return mNumTotalRef > FULL_VOLATILE_APR_POOL ;
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}
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//---------------------------------------------------------------------
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bool _ll_apr_warn_status(apr_status_t status, const char* file, int line)
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{
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if(APR_SUCCESS == status) return false;
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#if !LL_LINUX
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char buf[MAX_STRING]; /* Flawfinder: ignore */
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apr_strerror(status, buf, sizeof(buf));
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LL_WARNS("APR") << "APR: " << file << ":" << line << " " << buf << LL_ENDL;
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#endif
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return true;
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}
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void _ll_apr_assert_status(apr_status_t status, const char* file, int line)
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{
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llassert(! _ll_apr_warn_status(status, file, line));
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}
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//---------------------------------------------------------------------
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//
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// Scope based pool access
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//
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//---------------------------------------------------------------------
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class LLAPRFilePoolScope
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{
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public:
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LLAPRFilePoolScope() : pPool(NULL), mInitialized(false) {}
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LLAPRFilePoolScope(LLVolatileAPRPool* poolp) : mInitialized(false)
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{
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setFilePool(poolp);
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}
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~LLAPRFilePoolScope()
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{
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reset();
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}
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apr_pool_t* getVolatileAPRPool(LLVolatileAPRPool* poolp = NULL)
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{
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if (!pPool)
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{
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setFilePool(poolp);
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}
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if (mInitialized)
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{
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// We need one clear per one get
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// At the moment no need to support multiple calls
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LL_ERRS() << "LLAPRFilePoolScope is not supposed to be initialized twice" << LL_ENDL;
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}
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mInitialized = true;
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return pPool->getVolatileAPRPool();
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}
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void reset()
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{
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if (mInitialized)
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{
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pPool->clearVolatileAPRPool();
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}
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}
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private:
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void setFilePool(LLVolatileAPRPool* poolp = NULL)
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{
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if (poolp)
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{
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pPool = poolp;
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}
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else
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{
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pPool = LLAPRFile::sAPRFilePoolp;
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}
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}
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LLVolatileAPRPool *pPool;
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bool mInitialized;
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};
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//---------------------------------------------------------------------
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//
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// LLAPRFile functions
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//
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LLAPRFile::LLAPRFile()
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: mFile(NULL),
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mCurrentFilePoolp(NULL)
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{
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}
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LLAPRFile::LLAPRFile(const std::string& filename, apr_int32_t flags, LLVolatileAPRPool* pool)
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: mFile(NULL),
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mCurrentFilePoolp(NULL)
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{
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open(filename, flags, pool);
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}
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LLAPRFile::~LLAPRFile()
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{
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close() ;
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}
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apr_status_t LLAPRFile::close()
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{
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apr_status_t ret = APR_SUCCESS ;
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if(mFile)
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{
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ret = apr_file_close(mFile);
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mFile = NULL ;
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}
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if(mCurrentFilePoolp)
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{
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mCurrentFilePoolp->clearVolatileAPRPool() ;
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mCurrentFilePoolp = NULL ;
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}
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return ret ;
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}
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apr_status_t LLAPRFile::open(const std::string& filename, apr_int32_t flags, LLVolatileAPRPool* pool, S32* sizep)
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{
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apr_status_t s ;
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//check if already open some file
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llassert_always(!mFile) ;
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llassert_always(!mCurrentFilePoolp) ;
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mCurrentFilePoolp = pool ? pool : sAPRFilePoolp;
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apr_pool_t* apr_pool = mCurrentFilePoolp->getVolatileAPRPool(); //paired with clear in close()
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s = apr_file_open(&mFile, filename.c_str(), flags, APR_OS_DEFAULT, apr_pool);
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if (s != APR_SUCCESS || !mFile)
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{
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mFile = NULL ;
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if (sizep)
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{
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*sizep = 0;
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}
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}
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else if (sizep)
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{
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S32 file_size = 0;
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apr_off_t offset = 0;
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if (apr_file_seek(mFile, APR_END, &offset) == APR_SUCCESS)
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{
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llassert_always(offset <= 0x7fffffff);
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file_size = (S32)offset;
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offset = 0;
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apr_file_seek(mFile, APR_SET, &offset);
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}
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*sizep = file_size;
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}
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if (!mFile)
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{
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// It will clean pool
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close() ;
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}
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return s ;
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}
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//use gAPRPoolp.
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apr_status_t LLAPRFile::open(const std::string& filename, apr_int32_t flags, BOOL use_global_pool)
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{
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apr_status_t s;
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//check if already open some file
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llassert_always(!mFile) ;
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llassert_always(!mCurrentFilePoolp) ;
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llassert_always(use_global_pool) ; //be aware of using gAPRPoolp.
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s = apr_file_open(&mFile, filename.c_str(), flags, APR_OS_DEFAULT, gAPRPoolp);
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if (s != APR_SUCCESS || !mFile)
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{
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mFile = NULL ;
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close() ;
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return s;
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}
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return s;
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}
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// File I/O
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S32 LLAPRFile::read(void *buf, S32 nbytes)
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{
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if(!mFile)
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{
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LL_WARNS() << "apr mFile is removed by somebody else. Can not read." << LL_ENDL ;
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return 0;
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}
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apr_size_t sz = nbytes;
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apr_status_t s = apr_file_read(mFile, buf, &sz);
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if (s != APR_SUCCESS)
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{
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ll_apr_warn_status(s);
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return 0;
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}
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else
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{
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llassert_always(sz <= 0x7fffffff);
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return (S32)sz;
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}
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}
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S32 LLAPRFile::write(const void *buf, S32 nbytes)
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{
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if(!mFile)
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{
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LL_WARNS() << "apr mFile is removed by somebody else. Can not write." << LL_ENDL ;
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return 0;
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}
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apr_size_t sz = nbytes;
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apr_status_t s = apr_file_write(mFile, buf, &sz);
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if (s != APR_SUCCESS)
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{
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ll_apr_warn_status(s);
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return 0;
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}
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else
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{
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llassert_always(sz <= 0x7fffffff);
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return (S32)sz;
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}
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}
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S32 LLAPRFile::seek(apr_seek_where_t where, S32 offset)
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{
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return LLAPRFile::seek(mFile, where, offset) ;
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}
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//
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//*******************************************************************************************************************************
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//static components of LLAPRFile
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//
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//static
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apr_status_t LLAPRFile::close(apr_file_t* file_handle)
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{
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apr_status_t ret = APR_SUCCESS ;
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if(file_handle)
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{
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ret = apr_file_close(file_handle);
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file_handle = NULL ;
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}
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return ret ;
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}
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//static
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apr_file_t* LLAPRFile::open(const std::string& filename, apr_pool_t* apr_pool, apr_int32_t flags)
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{
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apr_status_t s;
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apr_file_t* file_handle ;
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s = apr_file_open(&file_handle, filename.c_str(), flags, APR_OS_DEFAULT, apr_pool);
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if (s != APR_SUCCESS || !file_handle)
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{
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ll_apr_warn_status(s);
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LL_WARNS("APR") << " Attempting to open filename: " << filename << LL_ENDL;
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file_handle = NULL ;
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close(file_handle) ;
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return NULL;
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}
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return file_handle ;
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}
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//static
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S32 LLAPRFile::seek(apr_file_t* file_handle, apr_seek_where_t where, S32 offset)
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{
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if(!file_handle)
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{
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return -1 ;
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}
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apr_status_t s;
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apr_off_t apr_offset;
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if (offset >= 0)
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{
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apr_offset = (apr_off_t)offset;
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s = apr_file_seek(file_handle, where, &apr_offset);
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}
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else
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{
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apr_offset = 0;
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s = apr_file_seek(file_handle, APR_END, &apr_offset);
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}
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if (s != APR_SUCCESS)
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{
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ll_apr_warn_status(s);
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return -1;
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}
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else
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{
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llassert_always(apr_offset <= 0x7fffffff);
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return (S32)apr_offset;
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}
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}
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//static
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S32 LLAPRFile::readEx(const std::string& filename, void *buf, S32 offset, S32 nbytes, LLVolatileAPRPool* pool)
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{
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//*****************************************
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LLAPRFilePoolScope scope(pool);
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apr_file_t* file_handle = open(filename, scope.getVolatileAPRPool(), APR_READ|APR_BINARY);
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//*****************************************
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if (!file_handle)
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{
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return 0;
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}
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llassert(offset >= 0);
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if (offset > 0)
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offset = LLAPRFile::seek(file_handle, APR_SET, offset);
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apr_size_t bytes_read;
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if (offset < 0)
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{
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bytes_read = 0;
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}
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else
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{
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bytes_read = nbytes ;
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apr_status_t s = apr_file_read(file_handle, buf, &bytes_read);
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if (s != APR_SUCCESS)
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{
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LL_WARNS("APR") << " Attempting to read filename: " << filename << LL_ENDL;
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ll_apr_warn_status(s);
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bytes_read = 0;
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}
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else
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{
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llassert_always(bytes_read <= 0x7fffffff);
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}
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}
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//*****************************************
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close(file_handle) ;
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//*****************************************
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return (S32)bytes_read;
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}
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//static
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S32 LLAPRFile::writeEx(const std::string& filename, void *buf, S32 offset, S32 nbytes, LLVolatileAPRPool* pool)
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{
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apr_int32_t flags = APR_CREATE|APR_WRITE|APR_BINARY;
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if (offset < 0)
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{
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flags |= APR_APPEND;
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offset = 0;
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}
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//*****************************************
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LLAPRFilePoolScope scope(pool);
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apr_file_t* file_handle = open(filename, scope.getVolatileAPRPool(), flags);
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|
//*****************************************
|
|
if (!file_handle)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
if (offset > 0)
|
|
{
|
|
offset = LLAPRFile::seek(file_handle, APR_SET, offset);
|
|
}
|
|
|
|
apr_size_t bytes_written;
|
|
if (offset < 0)
|
|
{
|
|
bytes_written = 0;
|
|
}
|
|
else
|
|
{
|
|
bytes_written = nbytes ;
|
|
apr_status_t s = apr_file_write(file_handle, buf, &bytes_written);
|
|
if (s != APR_SUCCESS)
|
|
{
|
|
LL_WARNS("APR") << " Attempting to write filename: " << filename << LL_ENDL;
|
|
ll_apr_warn_status(s);
|
|
bytes_written = 0;
|
|
}
|
|
else
|
|
{
|
|
llassert_always(bytes_written <= 0x7fffffff);
|
|
}
|
|
}
|
|
|
|
//*****************************************
|
|
LLAPRFile::close(file_handle);
|
|
//*****************************************
|
|
|
|
return (S32)bytes_written;
|
|
}
|
|
|
|
//static
|
|
bool LLAPRFile::remove(const std::string& filename, LLVolatileAPRPool* pool)
|
|
{
|
|
apr_status_t s;
|
|
|
|
LLAPRFilePoolScope scope(pool);
|
|
s = apr_file_remove(filename.c_str(), scope.getVolatileAPRPool());
|
|
|
|
if (s != APR_SUCCESS)
|
|
{
|
|
ll_apr_warn_status(s);
|
|
LL_WARNS("APR") << " Attempting to remove filename: " << filename << LL_ENDL;
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
//static
|
|
bool LLAPRFile::rename(const std::string& filename, const std::string& newname, LLVolatileAPRPool* pool)
|
|
{
|
|
apr_status_t s;
|
|
|
|
LLAPRFilePoolScope scope(pool);
|
|
s = apr_file_rename(filename.c_str(), newname.c_str(), scope.getVolatileAPRPool());
|
|
|
|
if (s != APR_SUCCESS)
|
|
{
|
|
ll_apr_warn_status(s);
|
|
LL_WARNS("APR") << " Attempting to rename filename: " << filename << LL_ENDL;
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
//static
|
|
bool LLAPRFile::isExist(const std::string& filename, LLVolatileAPRPool* pool, apr_int32_t flags)
|
|
{
|
|
apr_file_t* apr_file;
|
|
apr_status_t s;
|
|
|
|
LLAPRFilePoolScope scope(pool);
|
|
s = apr_file_open(&apr_file, filename.c_str(), flags, APR_OS_DEFAULT, scope.getVolatileAPRPool());
|
|
|
|
if (s != APR_SUCCESS || !apr_file)
|
|
{
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
apr_file_close(apr_file) ;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
//static
|
|
S32 LLAPRFile::size(const std::string& filename, LLVolatileAPRPool* pool)
|
|
{
|
|
apr_file_t* apr_file;
|
|
apr_finfo_t info;
|
|
apr_status_t s;
|
|
|
|
LLAPRFilePoolScope scope(pool);
|
|
s = apr_file_open(&apr_file, filename.c_str(), APR_READ, APR_OS_DEFAULT, scope.getVolatileAPRPool());
|
|
|
|
if (s != APR_SUCCESS || !apr_file)
|
|
{
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
apr_status_t s = apr_file_info_get(&info, APR_FINFO_SIZE, apr_file);
|
|
|
|
apr_file_close(apr_file) ;
|
|
|
|
if (s == APR_SUCCESS)
|
|
{
|
|
return (S32)info.size;
|
|
}
|
|
else
|
|
{
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
//static
|
|
bool LLAPRFile::makeDir(const std::string& dirname, LLVolatileAPRPool* pool)
|
|
{
|
|
apr_status_t s;
|
|
|
|
LLAPRFilePoolScope scope(pool);
|
|
s = apr_dir_make(dirname.c_str(), APR_FPROT_OS_DEFAULT, scope.getVolatileAPRPool());
|
|
|
|
if (s != APR_SUCCESS)
|
|
{
|
|
ll_apr_warn_status(s);
|
|
LL_WARNS("APR") << " Attempting to make directory: " << dirname << LL_ENDL;
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
//static
|
|
bool LLAPRFile::removeDir(const std::string& dirname, LLVolatileAPRPool* pool)
|
|
{
|
|
apr_status_t s;
|
|
|
|
LLAPRFilePoolScope scope(pool);
|
|
s = apr_file_remove(dirname.c_str(), scope.getVolatileAPRPool());
|
|
|
|
if (s != APR_SUCCESS)
|
|
{
|
|
ll_apr_warn_status(s);
|
|
LL_WARNS("APR") << " Attempting to remove directory: " << dirname << LL_ENDL;
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
//
|
|
//end of static components of LLAPRFile
|
|
//*******************************************************************************************************************************
|
|
//
|