tid_signal.c

来自「mpc8xx driver(led), based on tqm8」· C语言 代码 · 共 63 行

/***********************************************************************
 *
 * (C) Copyright 2000
 * Jean-Jacques Germond, Fr閐閞ic Soulier, Christian Batt; Alcatel
 * C/O [e-mail]
 *
 * All rights reserved.
 *
 * This code is free software; you can redistribute it and/or
 * modify it under the terms of the GNU *Library* General Public License
 * as published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This code 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
 * *Library* General Public License for more details.
 *
 * You should have received a copy of the GNU *Library* General Public
 * License along with this program (see file COPYING.LIB); if not,
 * write to the Free Software Foundation, Inc., 675 Mass Ave,
 * Cambridge, MA 02139, USA.
 *
 ***********************************************************************/

/* Some problems with the max number of signals being now 64
 * rather than 32 in AR examples.
 * So encapsulate this code.
 *
 *  Most probably, should use the kernel function recalc_sigpending
 *  but I am not sure about the needed locks and possible
 *  side effect.
 *
 */

   /* See AR pg:21  */
#  define __NO_VERSION__

#include "tid_def.h"
#include "asm/signal.h"

#if _NSIG_WORDS != 2
#error  "NON PORTABLE tid_caughtSignal function"
#endif


    int
tid_caughtSignal()
{
  unsigned long flags;
  int result;


  save_flags(flags);       /* Not sure that this is needed */
  cli();

  result = (current->signal.sig[1] & ~(current->blocked.sig[1]))
                              ||
           (current->signal.sig[0] & ~(current->blocked.sig[0]));
  restore_flags(flags);
  return result;
}