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Project/Src/rt-thread/components/dfs/include/dfs_file.h

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+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2005-01-26     Bernard      The first version.
+ */
+
+#ifndef __DFS_FILE_H__
+#define __DFS_FILE_H__
+
+#include <dfs.h>
+#include <dfs_fs.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct rt_pollreq;
+
+struct dfs_file_ops
+{
+    int (*open)     (struct dfs_fd *fd);
+    int (*close)    (struct dfs_fd *fd);
+    int (*ioctl)    (struct dfs_fd *fd, int cmd, void *args);
+    int (*read)     (struct dfs_fd *fd, void *buf, size_t count);
+    int (*write)    (struct dfs_fd *fd, const void *buf, size_t count);
+    int (*flush)    (struct dfs_fd *fd);
+    int (*lseek)    (struct dfs_fd *fd, off_t offset);
+    int (*getdents) (struct dfs_fd *fd, struct dirent *dirp, uint32_t count);
+
+    int (*poll)     (struct dfs_fd *fd, struct rt_pollreq *req);
+};
+
+/* file descriptor */
+#define DFS_FD_MAGIC     0xfdfd
+struct dfs_fd
+{
+    uint16_t magic;              /* file descriptor magic number */
+    uint16_t type;               /* Type (regular or socket) */
+
+    char *path;                  /* Name (below mount point) */
+    int ref_count;               /* Descriptor reference count */
+
+    struct dfs_filesystem *fs;
+    const struct dfs_file_ops *fops;
+
+    uint32_t flags;              /* Descriptor flags */
+    size_t   size;               /* Size in bytes */
+    off_t    pos;                /* Current file position */
+
+    void *data;                  /* Specific file system data */
+};
+
+int dfs_file_open(struct dfs_fd *fd, const char *path, int flags);
+int dfs_file_close(struct dfs_fd *fd);
+int dfs_file_ioctl(struct dfs_fd *fd, int cmd, void *args);
+int dfs_file_read(struct dfs_fd *fd, void *buf, size_t len);
+int dfs_file_getdents(struct dfs_fd *fd, struct dirent *dirp, size_t nbytes);
+int dfs_file_unlink(const char *path);
+int dfs_file_write(struct dfs_fd *fd, const void *buf, size_t len);
+int dfs_file_flush(struct dfs_fd *fd);
+int dfs_file_lseek(struct dfs_fd *fd, off_t offset);
+
+int dfs_file_stat(const char *path, struct stat *buf);
+int dfs_file_rename(const char *oldpath, const char *newpath);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif