127 lines
3.3 KiB
C++
127 lines
3.3 KiB
C++
/*
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* s3fs - FUSE-based file system backed by Amazon S3
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*
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* Copyright(C) 2007 Takeshi Nakatani <ggtakec.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; 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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#include <cstdio>
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#include "s3fs_logger.h"
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#include "fdcache_auto.h"
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#include "fdcache.h"
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//------------------------------------------------
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// AutoFdEntity methods
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//------------------------------------------------
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AutoFdEntity::AutoFdEntity() : pFdEntity(nullptr), pseudo_fd(-1)
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{
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}
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AutoFdEntity::~AutoFdEntity()
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{
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Close();
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}
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bool AutoFdEntity::Close()
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{
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if(pFdEntity){
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if(!FdManager::get()->Close(pFdEntity, pseudo_fd)){
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S3FS_PRN_ERR("Failed to close fdentity.");
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return false;
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}
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pFdEntity = nullptr;
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pseudo_fd = -1;
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}
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return true;
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}
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// [NOTE]
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// This method touches the internal fdentity with.
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// This is used to keep the file open.
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//
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int AutoFdEntity::Detach()
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{
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if(!pFdEntity){
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S3FS_PRN_ERR("Does not have a associated FdEntity.");
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return -1;
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}
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int fd = pseudo_fd;
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pseudo_fd = -1;
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pFdEntity = nullptr;
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return fd;
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}
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FdEntity* AutoFdEntity::Attach(const char* path, int existfd)
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{
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Close();
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if(nullptr == (pFdEntity = FdManager::get()->GetFdEntity(path, existfd, false))){
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S3FS_PRN_DBG("Could not find fd entity object(file=%s, pseudo_fd=%d)", path, existfd);
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return nullptr;
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}
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pseudo_fd = existfd;
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return pFdEntity;
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}
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FdEntity* AutoFdEntity::Open(const char* path, const headers_t* pmeta, off_t size, const struct timespec& ts_mctime, int flags, bool force_tmpfile, bool is_create, bool ignore_modify, AutoLock::Type type, int* error)
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{
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Close();
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if(nullptr == (pFdEntity = FdManager::get()->Open(pseudo_fd, path, pmeta, size, ts_mctime, flags, force_tmpfile, is_create, ignore_modify, type))){
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if(error){
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*error = pseudo_fd;
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}
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pseudo_fd = -1;
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return nullptr;
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}
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return pFdEntity;
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}
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// [NOTE]
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// the fd obtained by this method is not a newly created pseudo fd.
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//
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FdEntity* AutoFdEntity::GetExistFdEntity(const char* path, int existfd)
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{
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Close();
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FdEntity* ent;
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if(nullptr == (ent = FdManager::get()->GetExistFdEntity(path, existfd))){
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return nullptr;
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}
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return ent;
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}
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FdEntity* AutoFdEntity::OpenExistFdEntity(const char* path, int flags)
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{
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Close();
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if(nullptr == (pFdEntity = FdManager::get()->OpenExistFdEntity(path, pseudo_fd, flags))){
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return nullptr;
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}
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return pFdEntity;
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}
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: expandtab sw=4 ts=4 fdm=marker
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* vim<600: expandtab sw=4 ts=4
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*/
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