xnu-1504.9.26.tar.gz

[apple/xnu.git] / bsd / sys / tty.h

diff --git a/bsd/sys/tty.h b/bsd/sys/tty.h
index e49a9dbf26922e8efa88680a576fb45480e0f58b..f0f546c488a6033d85a425c99c9a759e8aaace58 100644 (file)
--- a/bsd/sys/tty.h
+++ b/bsd/sys/tty.h
@@ -76,6 +76,11 @@
 
 
 #ifdef KERNEL
+
+__BEGIN_DECLS
+#include <kern/locks.h>
+__END_DECLS
+
 /*
  * NetBSD Clists are actually ring buffers. The c_cc, c_cf, c_cl fields have
  * exactly the same behaviour as in true clists.
@@ -107,6 +112,8 @@ struct clist {
  * (low, high, timeout).
  */
 struct tty {
+       lck_mtx_t       t_lock;         /* Per tty lock */
+
        struct  clist t_rawq;           /* Device raw input queue. */
        long    t_rawcc;                /* Raw input queue statistics. */
        struct  clist t_canq;           /* Device canonical queue. */
@@ -136,8 +143,11 @@ struct tty {
        int     t_hiwat;                /* High water mark. */
        int     t_lowat;                /* Low water mark. */
        int     t_gen;                  /* Generation number. */
+       void    *t_iokit;               /* IOKit management */
 };
 
+#define TTY_NULL (struct tty *)0
+
 #define        t_cc            t_termios.c_cc
 #define        t_cflag         t_termios.c_cflag
 #define        t_iflag         t_termios.c_iflag
@@ -241,13 +251,6 @@ struct speedtab {
 #define        TTY_BI          0x08000000      /* Break condition */
 
 #ifdef KERNEL
-/* Is tp controlling terminal for p? */
-#define        isctty(p, tp)                                                   \
-       ((p)->p_session == (tp)->t_session && (p)->p_flag & P_CONTROLT)
-
-/* Is p in background of tp? */
-#define        isbackground(p, tp)                                             \
-       (isctty((p), (tp)) && (p)->p_pgrp != (tp)->t_pgrp)
 
 /* Unique sleep addresses. */
 #define        TSA_CARR_ON(tp)         ((void *)&(tp)->t_rawq)
@@ -278,17 +281,26 @@ void      cinit(void);
 void   clrbits(u_char *cp, int off, int len);
 
 #ifdef KERNEL_PRIVATE
+void   tty_init(void);
+/*
+ * The locked version of this function is used from routines which hold
+ * the tty_lock(), such as ttcompat() in tty_compat.c
+ */
+int    ttioctl_locked(struct tty *tp, u_long com, caddr_t data, int flag,
+           struct proc *p);
+
 int    ttcompat(struct tty *tp, u_long com, caddr_t data, int flag,
            struct proc *p);
-int    ttsetcompat(struct tty *tp, u_long *com, caddr_t data, struct termios *term);
 #endif /* KERNEL_PRIVATE */
 
+void tty_lock(struct tty *tp);
+void tty_unlock(struct tty *tp);
+
 void    termioschars(struct termios *t);
 int     tputchar(int c, struct tty *tp);
 int     ttioctl(struct tty *tp, u_long com, caddr_t data, int flag,
            struct proc *p);
 int     ttread(struct tty *tp, struct uio *uio, int flag);
-void    ttrstrt(void *tp);
 int     ttyselect(struct tty *tp, int rw, void * wql, struct proc *p);
 int     ttselect(dev_t dev, int rw, void * wql, struct proc *p);
 void    ttsetwater(struct tty *tp);
@@ -298,11 +310,11 @@ void       ttwakeup(struct tty *tp);
 int     ttwrite(struct tty *tp, struct uio *uio, int flag);
 void    ttwwakeup(struct tty *tp);
 void    ttyblock(struct tty *tp);
-void    ttychars(struct tty *tp);
 int     ttycheckoutq(struct tty *tp, int wait);
-int     ttyclose(struct tty *tp);
+int     ttyclose(struct tty *tp);      /* LEGACY: avoid using */
 void    ttyflush(struct tty *tp, int rw);
 void    ttyinfo(struct tty *tp);
+void    ttyinfo_locked(struct tty *tp);
 int     ttyinput(int c, struct tty *tp);
 int     ttylclose(struct tty *tp, int flag);
 int     ttymodem(struct tty *tp, int flag);