sim/common/dv-sockser.h

   1 /* Serial port emulation via sockets.
   2    Copyright (C) 1998-2020 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 SIM_RC dv_sockser_install (SIM_DESC);
  38
  39 #else
  40
  41 /* If dv-sockser isn't available, provide stub functions.  */
  42
  43 STATIC_INLINE int
  44 dv_sockser_status (SIM_DESC sd)
  45 {
  46   return (DV_SOCKSER_INPUT_EMPTY  |
  47           DV_SOCKSER_OUTPUT_EMPTY |
  48           DV_SOCKSER_DISCONNECTED);
  49 }
  50
  51 STATIC_INLINE int
  52 dv_sockser_write (SIM_DESC sd, unsigned char c)
  53 {
  54   return -1;
  55 }
  56
  57 STATIC_INLINE int
  58 dv_sockser_write_buffer (SIM_DESC sd, const unsigned char *buffer,
  59                          unsigned nr_bytes)
  60 {
  61   return -1;
  62 }
  63
  64 STATIC_INLINE int
  65 dv_sockser_read (SIM_DESC sd)
  66 {
  67   return -1;
  68 }
  69
  70 #endif /* HAVE_DV_SOCKSER */
  71
  72 #endif /* DV_SOCKSER_H */