contrib/sendmail-8.13.7/include/sm/setjmp.h

   1 /*
   2  * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
   3  *      All rights reserved.
   4  *
   5  * By using this file, you agree to the terms and conditions set
   6  * forth in the LICENSE file which can be found at the top level of
   7  * the sendmail distribution.
   8  *
   9  *      $Id: setjmp.h,v 1.3 2001/03/08 03:23:08 ca Exp $
  10  */
  11
  12 #ifndef SM_SETJMP_H
  13 # define SM_SETJMP_H
  14
  15 # include <sm/config.h>
  16 # include <setjmp.h>
  17
  18 /*
  19 **  sm_setjmp_sig is a setjmp that saves the signal mask.
  20 **  sm_setjmp_nosig is a setjmp that does *not* save the signal mask.
  21 **  SM_JMPBUF_T is used with both of the above macros.
  22 **
  23 **  On most systems, these can be implemented using sigsetjmp.
  24 **  Some old BSD systems do not have sigsetjmp, but they do have
  25 **  setjmp and _setjmp, which are just as good.
  26 */
  27
  28 # if SM_CONF_SIGSETJMP
  29
  30 typedef sigjmp_buf SM_JMPBUF_T;
  31 #  define sm_setjmp_sig(buf)            sigsetjmp(buf, 1)
  32 #  define sm_setjmp_nosig(buf)          sigsetjmp(buf, 0)
  33 #  define sm_longjmp_sig(buf, val)      siglongjmp(buf, val)
  34 #  define sm_longjmp_nosig(buf, val)    siglongjmp(buf, val)
  35
  36 # else /* SM_CONF_SIGSETJMP */
  37
  38 typedef jmp_buf SM_JMPBUF_T;
  39 #  define sm_setjmp_sig(buf)            setjmp(buf)
  40 #  define sm_longjmp_sig(buf, val)      longjmp(buf, val)
  41 #   define sm_setjmp_nosig(buf)         _setjmp(buf)
  42 #   define sm_longjmp_nosig(buf, val)   _longjmp(buf, val)
  43
  44 # endif /* SM_CONF_SIGSETJMP */
  45
  46 #endif /* ! SM_SETJMP_H */