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tty_flip.h
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_TTY_FLIP_H #define _LINUX_TTY_FLIP_H #include <linux/tty_buffer.h> #include <linux/tty_port.h> struct tty_ldisc; extern int tty_buffer_set_limit(struct tty_port *port, int limit); extern unsigned int tty_buffer_space_avail(struct tty_port *port); extern int tty_buffer_request_room(struct tty_port *port, size_t size); extern int tty_insert_flip_string_flags(struct tty_port *port, const unsigned char *chars, const char *flags, size_t size); extern int tty_insert_flip_string_fixed_flag(struct tty_port *port, const unsigned char *chars, char flag, size_t size); extern int tty_prepare_flip_string(struct tty_port *port, unsigned char **chars, size_t size); extern void tty_flip_buffer_push(struct tty_port *port); void tty_schedule_flip(struct tty_port *port); int __tty_insert_flip_char(struct tty_port *port, unsigned char ch, char flag); static inline int tty_insert_flip_char(struct tty_port *port, unsigned char ch, char flag) { struct tty_buffer *tb = port->buf.tail; int change; change = (tb->flags & TTYB_NORMAL) && (flag != TTY_NORMAL); if (!change && tb->used < tb->size) { if (~tb->flags & TTYB_NORMAL) *flag_buf_ptr(tb, tb->used) = flag; *char_buf_ptr(tb, tb->used++) = ch; return 1; } return __tty_insert_flip_char(port, ch, flag); } static inline int tty_insert_flip_string(struct tty_port *port, const unsigned char *chars, size_t size) { return tty_insert_flip_string_fixed_flag(port, chars, TTY_NORMAL, size); } int tty_ldisc_receive_buf(struct tty_ldisc *ld, const unsigned char *p, const char *f, int count); extern void tty_buffer_lock_exclusive(struct tty_port *port); extern void tty_buffer_unlock_exclusive(struct tty_port *port); #endif /* _LINUX_TTY_FLIP_H */