1 files changed, 215 insertions, 0 deletions
diff --git a/nuttx/include/nuttx/fs.h b/nuttx/include/nuttx/fs.h
new file mode 100644
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+++ b/nuttx/include/nuttx/fs.h
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+/************************************************************
+ * fs.h
+ *
+ *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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 Gregory Nutt 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_H
+#define __FS_H
+
+/************************************************************
+ * Included Files
+ ************************************************************/
+
+#include <sys/types.h>
+#include <semaphore.h>
+#include <nuttx/compiler.h>
+
+/************************************************************
+ * Definitions
+ ************************************************************/
+
+/************************************************************
+ * Type Definitions
+ ************************************************************/
+
+/* This structure is provided by filesystems when they are
+ * registered with the system.  It is used to call back to
+ * perform fs/device specific operations.
+ */
+
+struct file;
+struct file_operations
+{
+  int     (*open)(struct file *);
+  int     (*close)(struct file *);
+//  off_t (*llseek)(struct file *, off_t, int);
+  ssize_t (*read)(struct file *, char *, size_t);
+  ssize_t (*write)(struct file *, const char *, size_t);
+//  unsigned int (*poll)(struct file *, struct poll_table_struct *);
+  int     (*ioctl)(struct file *, int, unsigned long);
+};
+
+/* This structure represents one inode in the Nuttx psuedo-file system */
+
+struct inode
+{
+  struct inode           *i_peer;    /* Pointer to inode at same level */
+  struct inode           *i_child;   /* Pointer to inode at lower level */
+  struct file_operations *i_ops;     /* Driver file operations for inode */
+  sint16                  i_crefs;   /* References to inode */
+  uint16                  i_flags;  /* flags for inode */
+#ifdef CONFIG_FILE_MODE
+  mode_t                  i_mode;    /* Access mode flags */
+#endif
+  void                   *i_private; /* Driver private data */
+  char                    i_name[1]; /* Name of inode (variable length) */
+};
+#define FSNODE_SIZE(n) (sizeof(struct inode) + (n))
+
+/* This is the underlying representation of a ropen file.
+ * A file descriptor is an index into an array of such types.
+ * The type associates the file descriptor to the file state
+ * and to a set of inode operations.
+ */
+
+struct file
+{
+  int           f_oflags; /* Open mode flags */
+  off_t         f_pos;    /* File position */
+  struct inode *f_inode;  /* Driver interface */
+};
+
+/* This defines a list of files indexed by the file descriptor */
+
+#if CONFIG_NFILE_DESCRIPTORS > 0
+struct filelist
+{
+  sem_t   fl_sem;         /* Manage access to the file list */
+  sint16  fl_crefs;       /* Reference count */
+  struct file fl_files[CONFIG_NFILE_DESCRIPTORS];
+};
+#endif
+
+/* This defines the list of files used for standard C I/O
+ * We can support the standard C APIs without or without buffering
+ */
+
+/* Buffered file I/O structure */
+
+#if CONFIG_NFILE_STREAMS > 0
+struct file_struct
+{
+  int            fs_filedes;    /* File descriptor associated with stream */
+  mode_t         fs_oflags;     /* Open mode flags */
+#if CONFIG_NUNGET_CHARS > 0
+  uint8          fs_nungotten;  /* The number of characters buffered for ungetc */
+  unsigned char  fs_ungotten[CONFIG_NUNGET_CHARS];
+#endif
+#if CONFIG_STDIO_BUFFER_SIZE > 0
+  sem_t          fs_sem;        /* For thread safety */
+  pid_t          fs_holder;     /* Holder of sem */
+  int            fs_counts;     /* Number of times sem is held */
+  unsigned char *fs_bufstart;   /* Pointer to start of buffer */
+  unsigned char *fs_bufend;     /* Pointer to 1 past end of buffer */
+  unsigned char *fs_bufpos;     /* Current position in buffer */
+  unsigned char *fs_bufread;    /* Pointer to 1 past last buffered read char. */
+#endif
+};
+
+struct streamlist
+{
+  int                 sl_crefs; /* Reference count */
+  sem_t               sl_sem;   /* For thread safety */
+  struct file_struct sl_streams[CONFIG_NFILE_STREAMS];
+};
+#endif /* CONFIG_NFILE_STREAMS */
+
+/************************************************************
+ * Global Function Prototypes
+ ************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+/* fs_inode.c ***********************************************/
+
+/* These interfaces are used by drivers to register their
+ * inodes in the inode tree.
+ */
+
+EXTERN void   weak_function fs_initialize(void);
+EXTERN STATUS register_inode(const char *path,
+                             struct file_operations *fops,
+                             mode_t mode, void *private);
+EXTERN STATUS unregister_inode(const char *path);
+
+/* fs_open.c ************************************************/
+
+EXTERN int   inode_checkflags(struct inode *inode, int oflags);
+
+/* fs_files.c ***********************************************/
+
+#if CONFIG_NFILE_DESCRIPTORS >0
+EXTERN struct filelist *files_alloclist(void);
+EXTERN int files_addreflist(struct filelist *list);
+EXTERN int files_releaselist(struct filelist *list);
+EXTERN int files_dup(struct file *filep1, struct file *filep2);
+#endif
+
+/* lib_fopen.c **********************************************/
+
+/* Used by the OS to clone stdin, stdout, stderr */
+
+#if CONFIG_NFILE_STREAMS > 0
+EXTERN struct file_struct *lib_fdopen(int fd,
+                                       const char *mode,
+                                       struct filelist *flist,
+                                       struct streamlist *slist);
+#endif
+
+/* lib_fflush.c *********************************************/
+
+#if CONFIG_NFILE_STREAMS > 0
+EXTERN void lib_flushall(struct streamlist *list);
+#endif
+
+/* drivers **************************************************/
+
+/* Call in of these to register the corresponding default 
+ * default drivers in the drivers/ subdirectory
+ */
+
+EXTERN void devnull_register(void);
+
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __FS_H */