It is accomplished ...

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10 a95241bf-73f2-0310-859d-f6bbb57e9c96
2002-07-09 12:24:59 +00:00
commit 52a3801208
2025 changed files with 472889 additions and 0 deletions
@@ -0,0 +1,87 @@
+/* file.h
+ *
+ * File Descriptors
+ */
+ 
+#ifndef _FILE_H
+#define _FILE_H
+
+#include <sem.h>
+#include <lock.h>
+#include <atomic.h>
+#include <memheap.h>
+#include <sys/stat.h>
+
+
+struct file_descriptor;
+struct vnode;
+
+/** The I/O context of a process/team, holds the fd array */
+struct io_context {
+	struct vnode *cwd;
+	mutex	io_mutex;
+	int		table_size;
+	int		num_used_fds;
+	struct file_descriptor **fds;
+};
+
+struct fd_ops {
+	char *fs_name;
+	ssize_t		(*fd_read) (struct file_descriptor *, void *buffer, off_t pos, size_t *length);
+	ssize_t		(*fd_write)(struct file_descriptor *, const void *buffer, off_t pos, size_t *length);
+	int			(*fd_ioctl)(struct file_descriptor *, ulong op, void *buffer, size_t length);
+//	int			(*fd_poll)(struct file_descriptor *, int);
+	status_t	(*fd_read_dir)(struct file_descriptor *,struct dirent *buffer,size_t bufferSize,uint32 *_count);
+	status_t	(*fd_rewind_dir)(struct file_descriptor *);
+	int			(*fd_stat)(struct file_descriptor *, struct stat *);
+	int			(*fd_close)(struct file_descriptor *, int, struct io_context *);
+	void		(*fd_free)(struct file_descriptor *);
+};
+
+struct file_descriptor {
+	int32	type;               /* descriptor type */
+	int32	ref_count;
+	struct fd_ops *ops;
+	struct vnode *vnode;
+	void	*cookie;
+};
+
+//#define DTYPE_VNODE        1
+//#define DTYPE_SOCKET       2
+
+/* Types of file descriptors we can create */
+
+enum fd_types {
+	FDTYPE_VNODE = 1,	// ToDo: to be removed shortly
+	FDTYPE_FILE	= 1,
+	FDTYPE_ATTR,
+	FDTYPE_DIR,
+	FDTYPE_ATTRDIR,
+	FDTYPE_INDEX,
+	FDTYPE_QUERY,
+	FDTYPE_SOCKET
+};
+
+
+/* Prototypes */
+
+struct file_descriptor *alloc_fd(void);
+int new_fd(struct io_context *, struct file_descriptor *);
+struct file_descriptor *get_fd(struct io_context *, int);
+void remove_fd(struct io_context *, int);
+void put_fd(struct file_descriptor *);
+void free_fd(struct file_descriptor *);
+static struct io_context *get_current_io_context(bool kernel);
+
+
+/* Inlines */
+
+static __inline struct io_context *get_current_io_context(bool kernel)
+{
+	if (kernel)
+		return proc_get_kernel_proc()->ioctx;
+
+	return thread_get_current_thread()->proc->ioctx;
+}
+
+#endif /* _FILE_H */