mirror of
https://review.haiku-os.org/haiku
synced 2025-01-31 10:47:14 +01:00
a9b5f684f1
Applications that don't call open() or like functions too often,
and call many FD-related methods across multiple threads at once
(like "git status") now don't wait on the context lock as much.
("git status" performance isn't much improved because threads just
hit the "unused vnodes" lock instead.)
122 lines
3.6 KiB
C
122 lines
3.6 KiB
C
/*
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* Copyright 2002-2018, Axel Dörfler, axeld@pinc-software.de.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _FD_H
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#define _FD_H
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#include <vfs.h>
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#include <team.h>
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#include <thread.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct file_descriptor;
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struct io_context;
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struct selectsync;
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struct select_info;
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struct fd_ops {
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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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status_t (*fd_read)(struct file_descriptor *, off_t pos, void *buffer,
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size_t *length);
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status_t (*fd_write)(struct file_descriptor *, off_t pos,
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const void *buffer, size_t *length);
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ssize_t (*fd_readv)(struct file_descriptor *, off_t pos,
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const struct iovec *vecs, int count);
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ssize_t (*fd_writev)(struct file_descriptor *, off_t pos,
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const struct iovec *vecs, int count);
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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,
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size_t length);
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status_t (*fd_set_flags)(struct file_descriptor *, int flags);
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status_t (*fd_select)(struct file_descriptor *, uint8 event,
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struct selectsync *sync);
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status_t (*fd_deselect)(struct file_descriptor *, uint8 event,
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struct selectsync *sync);
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status_t (*fd_read_dir)(struct io_context* ioContext,
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struct file_descriptor *, struct dirent *buffer,
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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 *,
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int statMask);
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};
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struct file_descriptor {
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int32 ref_count;
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int32 open_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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// additional open mode - kernel special
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#define O_DISCONNECTED 0x80000000
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/* Prototypes */
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extern struct file_descriptor *alloc_fd(void);
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extern int new_fd_etc(struct io_context *, struct file_descriptor *,
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int firstIndex);
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extern int new_fd(struct io_context *, struct file_descriptor *);
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extern struct file_descriptor *get_fd(const struct io_context *, int);
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extern struct file_descriptor *get_open_fd(const struct io_context *, int);
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extern void close_fd(struct io_context *context,
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struct file_descriptor *descriptor);
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extern status_t close_fd_index(struct io_context *context, int fd);
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extern void put_fd(struct file_descriptor *descriptor);
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extern void disconnect_fd(struct file_descriptor *descriptor);
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extern void inc_fd_ref_count(struct file_descriptor *descriptor);
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extern int dup_foreign_fd(team_id fromTeam, int fd, bool kernel);
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extern status_t select_fd(int32 fd, struct select_info *info, bool kernel);
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extern status_t deselect_fd(int32 fd, struct select_info *info, bool kernel);
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extern bool fd_is_valid(int fd, bool kernel);
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extern struct vnode *fd_vnode(struct file_descriptor *descriptor);
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extern bool fd_is_file(struct file_descriptor* descriptor);
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extern bool fd_close_on_exec(const struct io_context *context, int fd);
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extern void fd_set_close_on_exec(struct io_context *context, int fd,
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bool closeFD);
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static struct io_context *get_current_io_context(bool kernel);
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extern status_t user_fd_kernel_ioctl(int fd, ulong op, void *buffer,
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size_t length);
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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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