usr/src/cmd/sendmail/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 #pragma ident   "%Z%%M% %I%     %E% SMI"
  13
  14 #ifndef SM_SETJMP_H
  15 # define SM_SETJMP_H
  16
  17 # include <sm/config.h>
  18 # include <setjmp.h>
  19
  20 /*
  21 **  sm_setjmp_sig is a setjmp that saves the signal mask.
  22 **  sm_setjmp_nosig is a setjmp that does *not* save the signal mask.
  23 **  SM_JMPBUF_T is used with both of the above macros.
  24 **
  25 **  On most systems, these can be implemented using sigsetjmp.
  26 **  Some old BSD systems do not have sigsetjmp, but they do have
  27 **  setjmp and _setjmp, which are just as good.
  28 */
  29
  30 # if SM_CONF_SIGSETJMP
  31
  32 typedef sigjmp_buf SM_JMPBUF_T;
  33 #  define sm_setjmp_sig(buf)            sigsetjmp(buf, 1)
  34 #  define sm_setjmp_nosig(buf)          sigsetjmp(buf, 0)
  35 #  define sm_longjmp_sig(buf, val)      siglongjmp(buf, val)
  36 #  define sm_longjmp_nosig(buf, val)    siglongjmp(buf, val)
  37
  38 # else /* SM_CONF_SIGSETJMP */
  39
  40 typedef jmp_buf SM_JMPBUF_T;
  41 #  define sm_setjmp_sig(buf)            setjmp(buf)
  42 #  define sm_longjmp_sig(buf, val)      longjmp(buf, val)
  43 #   define sm_setjmp_nosig(buf)         _setjmp(buf)
  44 #   define sm_longjmp_nosig(buf, val)   _longjmp(buf, val)
  45
  46 # endif /* SM_CONF_SIGSETJMP */
  47
  48 #endif /* ! SM_SETJMP_H */