kopia lustrzana https://github.com/OpenRTX/OpenRTX
115 wiersze
4.3 KiB
C++
115 wiersze
4.3 KiB
C++
/***************************************************************************
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* Copyright (C) 2013 by Terraneo Federico *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (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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* As a special exception, if other files instantiate templates or use *
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* macros or inline functions from this file, or you compile this file *
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* and link it with other works to produce a work based on this file, *
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* this file does not by itself cause the resulting work to be covered *
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* by the GNU General Public License. However the source code for this *
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* file must still be made available in accordance with the GNU General *
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* Public License. This exception does not invalidate any other reasons *
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* why a work based on this file might be covered by the GNU General *
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* Public License. *
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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, see <http://www.gnu.org/licenses/> *
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***************************************************************************/
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#ifndef MOUNTPOINTFS_H
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#define MOUNTPOINTFS_H
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#include <map>
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#include "filesystem/file.h"
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#include "kernel/sync.h"
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#include "config/miosix_settings.h"
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namespace miosix {
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#ifdef WITH_FILESYSTEM
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/**
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* MountpointFs is a special filesystem whose purpose is to create directories
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* to be used as mountpoints for other filesystems.
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*/
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class MountpointFs : public FilesystemBase
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{
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public:
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/**
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* Constructor
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*/
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MountpointFs() : mutex(FastMutex::RECURSIVE), inodeCount(rootDirInode+1) {}
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/**
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* Open a file
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* \param file the file object will be stored here, if the call succeeds
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* \param name the name of the file to open, relative to the local
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* filesystem
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* \param flags file flags (open for reading, writing, ...)
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* \param mode file permissions
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* \return 0 on success, or a negative number on failure
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*/
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virtual int open(intrusive_ref_ptr<FileBase>& file, StringPart& name,
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int flags, int mode);
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/**
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* Obtain information on a file, identified by a path name. Does not follow
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* symlinks
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* \param name path name, relative to the local filesystem
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* \param pstat file information is stored here
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* \return 0 on success, or a negative number on failure
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*/
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virtual int lstat(StringPart& name, struct stat *pstat);
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/**
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* Remove a file or directory
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* \param name path name of file or directory to remove
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* \return 0 on success, or a negative number on failure
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*/
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virtual int unlink(StringPart& name);
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/**
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* Rename a file or directory
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* \param oldName old file name
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* \param newName new file name
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* \return 0 on success, or a negative number on failure
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*/
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virtual int rename(StringPart& oldName, StringPart& newName);
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/**
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* Create a directory
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* \param name directory name
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* \param mode directory permissions
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* \return 0 on success, or a negative number on failure
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*/
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virtual int mkdir(StringPart& name, int mode);
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/**
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* Remove a directory if empty
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* \param name directory name
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* \return 0 on success, or a negative number on failure
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*/
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virtual int rmdir(StringPart& name);
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private:
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FastMutex mutex;
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std::map<StringPart,int> dirs;
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int inodeCount;
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static const int rootDirInode=1;
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};
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#endif //WITH_FILESYSTEM
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} //namespace miosix
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#endif //MOUNTPOINTFS_H
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