2011-02-21 Hui Zhu <teawater@gmail.com>

[deliverable/binutils-gdb.git] / gdb / posix-hdep.c

/* Host support routines for MinGW, for GDB, the GNU debugger.

   Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011
   Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"
#include "event-loop.h"

#include "gdb_string.h"

#include "gdb_select.h"

/* The strerror() function can return NULL for errno values that are
   out of range.  Provide a "safe" version that always returns a
   printable string.  */

char *
safe_strerror (int errnum)
{
  char *msg;

  msg = strerror (errnum);
  if (msg == NULL)
    {
      static char buf[32];

      xsnprintf (buf, sizeof buf, "(undocumented errno %d)", errnum);
      msg = buf;
    }
  return (msg);
}

/* Wrapper for select.  Nothing special needed on POSIX platforms.  */

int
gdb_select (int n, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
	    struct timeval *timeout)
{
  return select (n, readfds, writefds, exceptfds, timeout);
}

/* Wrapper for the body of signal handlers.  Nothing special needed on
   POSIX platforms.  */

void
gdb_call_async_signal_handler (struct async_signal_handler *handler,
			       int immediate_p)
{
  if (immediate_p)
    call_async_signal_handler (handler);
  else
    mark_async_signal_handler (handler);
}