release/src/router/mysql/mysys/mf_brkhant.c

   1 /* Copyright (c) 2000, 2001 MySQL AB
   2
   3    This program is free software; you can redistribute it and/or modify
   4    it under the terms of the GNU General Public License as published by
   5    the Free Software Foundation; version 2 of the License.
   6
   7    This program is distributed in the hope that it will be useful,
   8    but WITHOUT ANY WARRANTY; without even the implied warranty of
   9    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10    GNU General Public License for more details.
  11
  12    You should have received a copy of the GNU General Public License
  13    along with this program; if not, write to the Free Software
  14    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA */
  15
  16 /* Dont let the user break when you are doing something important */
  17 /* Remembers if it got 'SIGINT' and executes it on allow_break */
  18 /* A static buffer is used; don't call dont_break() twice in a row */
  19
  20 #include "mysys_priv.h"
  21 #include "my_static.h"
  22
  23         /* Set variable that we can't break */
  24
  25 #if !defined(THREAD)
  26 void dont_break(void)
  27 {
  28   my_dont_interrupt=1;
  29   return;
  30 } /* dont_break */
  31
  32 void allow_break(void)
  33 {
  34   {
  35     reg1 int index;
  36
  37     my_dont_interrupt=0;
  38     if (_my_signals)
  39     {
  40       if (_my_signals > MAX_SIGNALS)
  41         _my_signals=MAX_SIGNALS;
  42       for (index=0 ; index < _my_signals ; index++)
  43       {
  44         if (_my_sig_remember[index].func)                       /* Safequard */
  45         {
  46           (*_my_sig_remember[index].func)(_my_sig_remember[index].number);
  47           _my_sig_remember[index].func=0;
  48         }
  49       }
  50       _my_signals=0;
  51     }
  52   }
  53 } /* dont_break */
  54 #endif
  55
  56         /* Set old status */
  57
  58 #if !defined(THREAD)
  59 void my_remember_signal(int signal_number, sig_handler (*func) (int))
  60 {
  61 #ifndef __WIN__
  62   reg1 int index;
  63
  64   index=_my_signals++;                  /* Nobody can break a ++ ? */
  65   if (index < MAX_SIGNALS)
  66   {
  67     _my_sig_remember[index].number=signal_number;
  68     _my_sig_remember[index].func=func;
  69   }
  70 #endif /* __WIN__ */
  71 } /* my_remember_signal */
  72 #endif /* THREAD */