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- /****************************************************************************
- * nuttx/fs/hostfs/hostfs.h
- *
- * Copyright (C) 2015 Ken Pettit. All rights reserved.
- * Author: Ken Pettit <pettitkd@gmail.com>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
- #ifndef __FS_HOSTFS_HOSTFS_H
- #define __FS_HOSTFS_HOSTFS_H
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <sys/types.h>
- #include <stdint.h>
- #include <stdbool.h>
- #include <nuttx/semaphore.h>
- /****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
- /* Quasi-standard definitions */
- #ifndef MIN
- # define MIN(a,b) (a < b ? a : b)
- #endif
- #ifndef MAX
- # define MAX(a,b) (a > b ? a : b)
- #endif
- #define HOSTFS_MAX_PATH 256
- /****************************************************************************
- * Public Types
- ****************************************************************************/
- /* This structure describes the state of one open file. This structure
- * is protected by the volume semaphore.
- */
- struct hostfs_ofile_s
- {
- struct hostfs_ofile_s *fnext; /* Supports a singly linked list */
- int16_t crefs; /* Reference count */
- mode_t oflags; /* Open mode */
- int fd;
- };
- /* This structure represents the overall mountpoint state. An instance of
- * this structure is retained as inode private data on each mountpoint that
- * is mounted with a hostfs filesystem.
- */
- struct hostfs_mountpt_s
- {
- sem_t *fs_sem; /* Used to assure thread-safe access */
- FAR struct hostfs_ofile_s *fs_head; /* A singly-linked list of open files */
- char fs_root[HOSTFS_MAX_PATH];
- };
- /****************************************************************************
- * Internal function prototypes
- ****************************************************************************/
- /* Semaphore access for internal use */
- int hostfs_semtake(struct hostfs_mountpt_s *fs);
- void hostfs_semgive(struct hostfs_mountpt_s *fs);
- /* Forward references for utility functions */
- struct hostfs_mountpt_s;
- struct file; /* Forward references */
- struct inode;
- struct fs_dirent_s;
- struct statfs;
- struct stat;
- #endif /* __FS_HOSTFS_HOSTFS_H */
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