forked from jiuyuan/JYCache
75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
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/*
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* s3fs - FUSE-based file system backed by Amazon S3
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*
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* Copyright(C) 2007 Randy Rizun <rrizun@gmail.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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#ifndef S3FS_FDCACHE_AUTO_H_
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#define S3FS_FDCACHE_AUTO_H_
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#include <fcntl.h>
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#include "autolock.h"
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#include "metaheader.h"
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class FdEntity;
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//------------------------------------------------
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// class AutoFdEntity
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//------------------------------------------------
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// A class that opens fdentry and closes it automatically.
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// This class object is used to prevent inconsistencies in
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// the number of references in fdentry.
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// The methods are wrappers to the method of the FdManager class.
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//
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class AutoFdEntity
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{
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private:
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FdEntity* pFdEntity;
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int pseudo_fd;
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private:
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AutoFdEntity(const AutoFdEntity&) = delete;
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AutoFdEntity(AutoFdEntity&&) = delete;
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AutoFdEntity& operator=(const AutoFdEntity&) = delete;
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AutoFdEntity& operator=(AutoFdEntity&&) = delete;
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public:
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AutoFdEntity();
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~AutoFdEntity();
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bool Close();
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int Detach();
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FdEntity* Attach(const char* path, int existfd);
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int GetPseudoFd() const { return pseudo_fd; }
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FdEntity* 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 = nullptr);
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FdEntity* GetExistFdEntity(const char* path, int existfd = -1);
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FdEntity* OpenExistFdEntity(const char* path, int flags = O_RDONLY);
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};
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#endif // S3FS_FDCACHE_AUTO_H_
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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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