gdb/posix-hdep.c

   1 /* Host support routines for MinGW, for GDB, the GNU debugger.
   2
   3    Copyright (C) 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "event-loop.h"
  22
  23 #include "gdb_string.h"
  24
  25 #include "gdb_select.h"
  26
  27 /* The strerror() function can return NULL for errno values that are
  28    out of range.  Provide a "safe" version that always returns a
  29    printable string. */
  30
  31 char *
  32 safe_strerror (int errnum)
  33 {
  34   char *msg;
  35
  36   msg = strerror (errnum);
  37   if (msg == NULL)
  38     {
  39       static char buf[32];
  40
  41       xsnprintf (buf, sizeof buf, "(undocumented errno %d)", errnum);
  42       msg = buf;
  43     }
  44   return (msg);
  45 }
  46
  47 /* Wrapper for select.  Nothing special needed on POSIX platforms.  */
  48
  49 int
  50 gdb_select (int n, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
  51             struct timeval *timeout)
  52 {
  53   return select (n, readfds, writefds, exceptfds, timeout);
  54 }
  55
  56 /* Wrapper for the body of signal handlers.  Nothing special needed on
  57    POSIX platforms.  */
  58
  59 void
  60 gdb_call_async_signal_handler (struct async_signal_handler *handler,
  61                                int immediate_p)
  62 {
  63   if (immediate_p)
  64     call_async_signal_handler (handler);
  65   else
  66     mark_async_signal_handler (handler);
  67 }