sim/common/dv-sockser.h

   1 /* Serial port emulation via sockets.
   2    Copyright (C) 1998-2024 Free Software Foundation, Inc.
   3
   4 This file is part of the GNU simulators.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 3 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef DV_SOCKSER_H
  20 #define DV_SOCKSER_H
  21
  22 #include "sim-inline.h"
  23
  24 /* bits in result of dev_sockser_status */
  25 #define DV_SOCKSER_INPUT_EMPTY  0x1
  26 #define DV_SOCKSER_OUTPUT_EMPTY 0x2
  27 #define DV_SOCKSER_DISCONNECTED 0x4
  28
  29 #ifdef HAVE_DV_SOCKSER
  30
  31 /* FIXME: later add a device ptr arg */
  32 extern int dv_sockser_status (SIM_DESC);
  33 int dv_sockser_write (SIM_DESC, unsigned char);
  34 int dv_sockser_write_buffer (SIM_DESC, const unsigned char *, unsigned);
  35 int dv_sockser_read (SIM_DESC);
  36
  37 #else
  38
  39 /* If dv-sockser isn't available, provide stub functions.  */
  40
  41 STATIC_INLINE int
  42 dv_sockser_status (SIM_DESC sd)
  43 {
  44   return (DV_SOCKSER_INPUT_EMPTY  |
  45           DV_SOCKSER_OUTPUT_EMPTY |
  46           DV_SOCKSER_DISCONNECTED);
  47 }
  48
  49 STATIC_INLINE int
  50 dv_sockser_write (SIM_DESC sd, unsigned char c)
  51 {
  52   return -1;
  53 }
  54
  55 STATIC_INLINE int
  56 dv_sockser_write_buffer (SIM_DESC sd, const unsigned char *buffer,
  57                          unsigned nr_bytes)
  58 {
  59   return -1;
  60 }
  61
  62 STATIC_INLINE int
  63 dv_sockser_read (SIM_DESC sd)
  64 {
  65   return -1;
  66 }
  67
  68 #endif /* HAVE_DV_SOCKSER */
  69
  70 #endif /* DV_SOCKSER_H */