From d95c7e4e34da2582fce1b8a47092605c7b4c19e0 Mon Sep 17 00:00:00 2001 From: Mark Mitchell Date: Fri, 25 Mar 2005 19:47:23 +0000 Subject: * Makefile.in (SFILES): Add ser-base.c. (ser_base_h): New variable. (ser-base.o): New target. (ser-pipe.o): Depend on $(ser_base_h). (ser-tcp.o): Likewise. (ser-unix.o): Likewise. Do not depend on $(event_loop_h). * configure.ac (SER_HARDWIRE): Include ser-base.o where appropriate. * ser-base.c: New file. (push_event): Move from ser-unix.c. (fd_event): Likewise. (reschedule): Likewise. (ser_unix_write): Likewise. (ser_unix_nop_flush_output): Likewise. (ser_unix_flush_input): Likewise. (ser_unix_nop_send_break): Likewise. (ser_unix_nop_drain_output): Likewise. (ser_unix_nop_raw): Likewise. (ser_unix_nop_get_tty_state): Likewise. (ser_unix_nop_set_tty_state): Likewise. (ser_unix_nop_noflush_set_tty_state): Likewise. (ser_unix_nop_print_tty_state): Likewise. (ser_unix_nop_setbaudrate): Likewise. (ser_unix_nop_setstopbits): Likewise. (ser_unix_async): Likewise. * ser-base.h: New file. * ser-pipe.c (ser-base.h): Include it. * ser-tcp.c (ser-base.h): Likewise. * ser-unix.h (ser_unix_nop_flush_output): Remove. (ser_unix_flush_input): Likewise. (ser_unix_nop_send_break): Likewise. (ser_unix_nop_raw): Likewise. (ser_unix_nop_get_tty_state): Likewise. (ser_unix_nop_set_tty_state): Likewise. (ser_unix_nop_print_tty_state): Likewise. (ser_unix_nop_noflush_set_tty_state): Likewise. (ser_unix_nop_setbaudrate): Likewise. (ser_unix_nop_setstopbits): Likewise. (ser_unix_nop_drain_output): Likewise. (ser_unix_wait_for): Likewise. (ser_unix_write): Likewise. (ser_unix_async): Likewise. * ser-unix.c (event-loop.h): Do not include it. (push_event): Move to ser-base.c. (fd_event): Likewise. (reschedule): Likewise. (ser_unix_write): Likewise. (ser_unix_nop_flush_output): Likewise. (ser_unix_flush_input): Likewise. (ser_unix_nop_send_break): Likewise. (ser_unix_nop_drain_output): Likewise. (ser_unix_nop_raw): Likewise. (ser_unix_nop_get_tty_state): Likewise. (ser_unix_nop_set_tty_state): Likewise. (ser_unix_nop_noflush_set_tty_state): Likewise. (ser_unix_nop_print_tty_state): Likewise. (ser_unix_nop_setbaudrate): Likewise. (ser_unix_nop_setstopbits): Likewise. (ser_unix_async): Likewise. (ser_unix_wait_for): Make it static. * configure: Regenerated. --- gdb/ser-unix.c | 292 +-------------------------------------------------------- 1 file changed, 3 insertions(+), 289 deletions(-) (limited to 'gdb/ser-unix.c') diff --git a/gdb/ser-unix.c b/gdb/ser-unix.c index bc918941dcf..4f709de2016 100644 --- a/gdb/ser-unix.c +++ b/gdb/ser-unix.c @@ -1,7 +1,7 @@ /* Serial interface for local (hardwired) serial ports on Un*x like systems Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, - 2003, 2004 Free Software Foundation, Inc. + 2003, 2004, 2005 Free Software Foundation, Inc. This file is part of GDB. @@ -22,6 +22,7 @@ #include "defs.h" #include "serial.h" +#include "ser-base.h" #include "ser-unix.h" #include @@ -31,7 +32,6 @@ #include #include "gdb_string.h" -#include "event-loop.h" #ifdef HAVE_TERMIOS @@ -92,11 +92,6 @@ static int hardwire_flush_input (struct serial *); static int hardwire_send_break (struct serial *); static int hardwire_setstopbits (struct serial *, int); -static int do_unix_readchar (struct serial *scb, int timeout); -static timer_handler_func push_event; -static handler_func fd_event; -static void reschedule (struct serial *scb); - void _initialize_ser_hardwire (void); /* Open up a real live device for serial I/O */ @@ -870,31 +865,10 @@ hardwire_close (struct serial *scb) } -/* Generic operations used by all UNIX/FD based serial interfaces. */ - -serial_ttystate -ser_unix_nop_get_tty_state (struct serial *scb) -{ - /* allocate a dummy */ - return (serial_ttystate) XMALLOC (int); -} - -int -ser_unix_nop_set_tty_state (struct serial *scb, serial_ttystate ttystate) -{ - return 0; -} - -void -ser_unix_nop_raw (struct serial *scb) -{ - return; /* Always in raw mode */ -} - /* Wait for input on scb, with timeout seconds. Returns 0 on success, otherwise SERIAL_TIMEOUT or SERIAL_ERROR. */ -int +static int ser_unix_wait_for (struct serial *scb, int timeout) { while (1) @@ -1074,267 +1048,7 @@ ser_unix_readchar (struct serial *scb, int timeout) { return generic_readchar (scb, timeout, do_unix_readchar); } - -int -ser_unix_nop_noflush_set_tty_state (struct serial *scb, - serial_ttystate new_ttystate, - serial_ttystate old_ttystate) -{ - return 0; -} - -void -ser_unix_nop_print_tty_state (struct serial *scb, - serial_ttystate ttystate, - struct ui_file *stream) -{ - /* Nothing to print. */ - return; -} - -int -ser_unix_nop_setbaudrate (struct serial *scb, int rate) -{ - return 0; /* Never fails! */ -} - -int -ser_unix_nop_setstopbits (struct serial *scb, int num) -{ - return 0; /* Never fails! */ -} - -int -ser_unix_write (struct serial *scb, const char *str, int len) -{ - int cc; - - while (len > 0) - { - cc = write (scb->fd, str, len); - - if (cc < 0) - return 1; - len -= cc; - str += cc; - } - return 0; -} - -int -ser_unix_nop_flush_output (struct serial *scb) -{ - return 0; -} - -int -ser_unix_flush_input (struct serial *scb) -{ - if (scb->bufcnt >= 0) - { - scb->bufcnt = 0; - scb->bufp = scb->buf; - return 0; - } - else - return SERIAL_ERROR; -} - -int -ser_unix_nop_send_break (struct serial *scb) -{ - return 0; -} - -int -ser_unix_nop_drain_output (struct serial *scb) -{ - return 0; -} - - -/* Event handling for ASYNC serial code. - - At any time the SERIAL device either: has an empty FIFO and is - waiting on a FD event; or has a non-empty FIFO/error condition and - is constantly scheduling timer events. - - ASYNC only stops pestering its client when it is de-async'ed or it - is told to go away. */ - -/* Value of scb->async_state: */ -enum { - /* >= 0 (TIMER_SCHEDULED) */ - /* The ID of the currently scheduled timer event. This state is - rarely encountered. Timer events are one-off so as soon as the - event is delivered the state is shanged to NOTHING_SCHEDULED. */ - FD_SCHEDULED = -1, - /* The fd_event() handler is scheduled. It is called when ever the - file descriptor becomes ready. */ - NOTHING_SCHEDULED = -2 - /* Either no task is scheduled (just going into ASYNC mode) or a - timer event has just gone off and the current state has been - forced into nothing scheduled. */ -}; - -/* Identify and schedule the next ASYNC task based on scb->async_state - and scb->buf* (the input FIFO). A state machine is used to avoid - the need to make redundant calls into the event-loop - the next - scheduled task is only changed when needed. */ - -static void -reschedule (struct serial *scb) -{ - if (serial_is_async_p (scb)) - { - int next_state; - switch (scb->async_state) - { - case FD_SCHEDULED: - if (scb->bufcnt == 0) - next_state = FD_SCHEDULED; - else - { - delete_file_handler (scb->fd); - next_state = create_timer (0, push_event, scb); - } - break; - case NOTHING_SCHEDULED: - if (scb->bufcnt == 0) - { - add_file_handler (scb->fd, fd_event, scb); - next_state = FD_SCHEDULED; - } - else - { - next_state = create_timer (0, push_event, scb); - } - break; - default: /* TIMER SCHEDULED */ - if (scb->bufcnt == 0) - { - delete_timer (scb->async_state); - add_file_handler (scb->fd, fd_event, scb); - next_state = FD_SCHEDULED; - } - else - next_state = scb->async_state; - break; - } - if (serial_debug_p (scb)) - { - switch (next_state) - { - case FD_SCHEDULED: - if (scb->async_state != FD_SCHEDULED) - fprintf_unfiltered (gdb_stdlog, "[fd%d->fd-scheduled]\n", - scb->fd); - break; - default: /* TIMER SCHEDULED */ - if (scb->async_state == FD_SCHEDULED) - fprintf_unfiltered (gdb_stdlog, "[fd%d->timer-scheduled]\n", - scb->fd); - break; - } - } - scb->async_state = next_state; - } -} - -/* FD_EVENT: This is scheduled when the input FIFO is empty (and there - is no pending error). As soon as data arrives, it is read into the - input FIFO and the client notified. The client should then drain - the FIFO using readchar(). If the FIFO isn't immediatly emptied, - push_event() is used to nag the client until it is. */ - -static void -fd_event (int error, void *context) -{ - struct serial *scb = context; - if (error != 0) - { - scb->bufcnt = SERIAL_ERROR; - } - else if (scb->bufcnt == 0) - { - /* Prime the input FIFO. The readchar() function is used to - pull characters out of the buffer. See also - generic_readchar(). */ - int nr; - do - { - nr = read (scb->fd, scb->buf, BUFSIZ); - } - while (nr == -1 && errno == EINTR); - if (nr == 0) - { - scb->bufcnt = SERIAL_EOF; - } - else if (nr > 0) - { - scb->bufcnt = nr; - scb->bufp = scb->buf; - } - else - { - scb->bufcnt = SERIAL_ERROR; - } - } - scb->async_handler (scb, scb->async_context); - reschedule (scb); -} - -/* PUSH_EVENT: The input FIFO is non-empty (or there is a pending - error). Nag the client until all the data has been read. In the - case of errors, the client will need to close or de-async the - device before naging stops. */ - -static void -push_event (void *context) -{ - struct serial *scb = context; - scb->async_state = NOTHING_SCHEDULED; /* Timers are one-off */ - scb->async_handler (scb, scb->async_context); - /* re-schedule */ - reschedule (scb); -} - -/* Put the SERIAL device into/out-of ASYNC mode. */ - -void -ser_unix_async (struct serial *scb, - int async_p) -{ - if (async_p) - { - /* Force a re-schedule. */ - scb->async_state = NOTHING_SCHEDULED; - if (serial_debug_p (scb)) - fprintf_unfiltered (gdb_stdlog, "[fd%d->asynchronous]\n", - scb->fd); - reschedule (scb); - } - else - { - if (serial_debug_p (scb)) - fprintf_unfiltered (gdb_stdlog, "[fd%d->synchronous]\n", - scb->fd); - /* De-schedule whatever tasks are currently scheduled. */ - switch (scb->async_state) - { - case FD_SCHEDULED: - delete_file_handler (scb->fd); - break; - case NOTHING_SCHEDULED: - break; - default: /* TIMER SCHEDULED */ - delete_timer (scb->async_state); - break; - } - } -} - void _initialize_ser_hardwire (void) { -- cgit v1.2.1