mirror of
https://review.haiku-os.org/haiku
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88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
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/* file.h
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*
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* File Descriptors
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*/
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#ifndef _FILE_H
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#define _FILE_H
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#include <sem.h>
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#include <lock.h>
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#include <atomic.h>
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#include <memheap.h>
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#include <sys/stat.h>
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struct file_descriptor;
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struct vnode;
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/** The I/O context of a process/team, holds the fd array */
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struct io_context {
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struct vnode *cwd;
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mutex io_mutex;
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int table_size;
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int num_used_fds;
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struct file_descriptor **fds;
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};
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struct fd_ops {
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char *fs_name;
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ssize_t (*fd_read) (struct file_descriptor *, void *buffer, off_t pos, size_t *length);
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ssize_t (*fd_write)(struct file_descriptor *, const void *buffer, off_t pos, size_t *length);
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int (*fd_ioctl)(struct file_descriptor *, ulong op, void *buffer, size_t length);
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// int (*fd_poll)(struct file_descriptor *, int);
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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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int (*fd_stat)(struct file_descriptor *, struct stat *);
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int (*fd_close)(struct file_descriptor *, int, struct io_context *);
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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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struct vnode *vnode;
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void *cookie;
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};
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//#define DTYPE_VNODE 1
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//#define DTYPE_SOCKET 2
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/* Types of file descriptors we can create */
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enum fd_types {
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FDTYPE_VNODE = 1, // ToDo: to be removed shortly
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FDTYPE_FILE = 1,
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FDTYPE_ATTR,
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FDTYPE_DIR,
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FDTYPE_ATTRDIR,
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FDTYPE_INDEX,
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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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struct file_descriptor *alloc_fd(void);
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int new_fd(struct io_context *, struct file_descriptor *);
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struct file_descriptor *get_fd(struct io_context *, int);
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void remove_fd(struct io_context *, int);
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void put_fd(struct file_descriptor *);
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void free_fd(struct file_descriptor *);
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static struct io_context *get_current_io_context(bool kernel);
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/* Inlines */
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static __inline struct io_context *get_current_io_context(bool kernel)
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{
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if (kernel)
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return proc_get_kernel_proc()->ioctx;
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return thread_get_current_thread()->proc->ioctx;
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}
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#endif /* _FILE_H */
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