libguile/stackchk.h

   1 /* classes: h_files */
   2
   3 #ifndef SCM_STACKCHK_H
   4 #define SCM_STACKCHK_H
   5
   6 /* Copyright (C) 1995,1996,1998,2000 Free Software Foundation, Inc.
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21  */
  22
  23 \f
  24
  25 #include "libguile/__scm.h"
  26
  27 #include "libguile/continuations.h"
  28 #include "libguile/debug.h"
  29
  30 \f
  31
  32 /* With debug options we have the possibility to disable stack checking.
  33  */
  34 #define SCM_STACK_CHECKING_P SCM_STACK_LIMIT
  35
  36 #ifdef STACK_CHECKING
  37 # if SCM_STACK_GROWS_UP
  38 #  define SCM_STACK_OVERFLOW_P(s)\
  39    (s > ((SCM_STACKITEM *) SCM_BASE (scm_rootcont) + SCM_STACK_LIMIT))
  40 # else
  41 #  define SCM_STACK_OVERFLOW_P(s)\
  42    (s < ((SCM_STACKITEM *) SCM_BASE (scm_rootcont) - SCM_STACK_LIMIT))
  43 # endif
  44 # define SCM_CHECK_STACK\
  45     {\
  46        SCM_STACKITEM stack;\
  47        if (SCM_STACK_OVERFLOW_P (&stack) && scm_stack_checking_enabled_p)\
  48          scm_report_stack_overflow ();\
  49     }
  50 #else
  51 # define SCM_CHECK_STACK /**/
  52 #endif /* STACK_CHECKING */
  53
  54 SCM_API int scm_stack_checking_enabled_p;
  55
  56 \f
  57
  58 SCM_API void scm_report_stack_overflow (void);
  59 SCM_API long scm_stack_size (SCM_STACKITEM *start);
  60 SCM_API void scm_stack_report (void);
  61 SCM_API void scm_init_stackchk (void);
  62
  63 #endif  /* SCM_STACKCHK_H */
  64
  65 /*
  66   Local Variables:
  67   c-file-style: "gnu"
  68   End:
  69 */