96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
/*
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** Copyright 2002, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
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** Distributed under the terms of the OpenBeOS License.
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*/
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#ifndef _FD_H
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#define _FD_H
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#include <sem.h>
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#include <lock.h>
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#include <memheap.h>
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#include <sys/stat.h>
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#include <team.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct select_sync;
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struct fd_ops {
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status_t (*fd_read)(struct file_descriptor *, off_t pos, void *buffer, size_t *length);
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status_t (*fd_write)(struct file_descriptor *, off_t pos, const void *buffer, size_t *length);
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off_t (*fd_seek)(struct file_descriptor *, off_t pos, int seekType);
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status_t (*fd_ioctl)(struct file_descriptor *, ulong op, void *buffer, size_t length);
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status_t (*fd_select)(struct file_descriptor *, uint8 event, uint32 ref, struct select_sync *sync);
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status_t (*fd_deselect)(struct file_descriptor *, uint8 event, struct select_sync *sync);
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status_t (*fd_read_dir)(struct file_descriptor *, struct dirent *buffer, size_t bufferSize, uint32 *_count);
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status_t (*fd_rewind_dir)(struct file_descriptor *);
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status_t (*fd_read_stat)(struct file_descriptor *, struct stat *);
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status_t (*fd_write_stat)(struct file_descriptor *, const struct stat *, int statMask);
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status_t (*fd_close)(struct file_descriptor *);
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void (*fd_free)(struct file_descriptor *);
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};
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struct file_descriptor {
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int32 type; /* descriptor type */
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int32 ref_count;
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struct fd_ops *ops;
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union {
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struct vnode *vnode;
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struct fs_mount *mount;
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} u;
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void *cookie;
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int32 open_mode;
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off_t pos;
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};
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/* Types of file descriptors we can create */
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enum fd_types {
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FDTYPE_FILE = 1,
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FDTYPE_ATTR,
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FDTYPE_DIR,
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FDTYPE_ATTR_DIR,
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FDTYPE_INDEX,
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FDTYPE_INDEX_DIR,
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FDTYPE_QUERY,
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FDTYPE_SOCKET
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};
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/* Prototypes */
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extern struct file_descriptor *alloc_fd(void);
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extern int new_fd(struct io_context *, struct file_descriptor *);
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extern struct file_descriptor *get_fd(struct io_context *, int);
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extern void put_fd(struct file_descriptor *);
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extern void free_fd(struct file_descriptor *);
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extern status_t select_fd(int fd, uint8 event, uint32 ref, struct select_sync *sync, bool kernel);
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extern status_t deselect_fd(int fd, uint8 event, struct select_sync *sync, bool kernel);
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extern bool fd_is_valid(int fd, bool kernel);
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static struct io_context *get_current_io_context(bool kernel);
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/* The prototypes of the (sys|user)_ functions are currently defined in vfs.h */
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/* Inlines */
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static inline struct io_context *
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get_current_io_context(bool kernel)
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{
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if (kernel)
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return (struct io_context *)team_get_kernel_team()->io_context;
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return (struct io_context *)thread_get_current_thread()->team->io_context;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* _FD_H */
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