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maintainer changed: was lord, now jimb; first import

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Jim Blandy 1996-07-25 22:56:11 +00:00
commit 0f2d19dd46
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libguile/root.c Normal file
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/* Copyright (C) 1995,1996 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
* As a special exception, the Free Software Foundation gives permission
* for additional uses of the text contained in its release of GUILE.
*
* The exception is that, if you link the GUILE library with other files
* to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the GUILE library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the
* Free Software Foundation under the name GUILE. If you copy
* code from other Free Software Foundation releases into a copy of
* GUILE, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for GUILE, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice.
*/
#include <stdio.h>
#include "_scm.h"
SCM scm_sys_protects[SCM_NUM_PROTECTS];
struct scm_root_state the_scm_root;
struct scm_root_state * scm_root = &the_scm_root;
/* Call thunk(closure) underneath a top-level error handler.
* If an error occurs, pass the exitval through err_filter and return it.
* If no error occurs, return the value of thunk.
*/
#ifdef _UNICOS
typedef int setjmp_type;
#else
typedef long setjmp_type;
#endif
#ifdef __STDC__
SCM
scm_call_catching_errors (SCM (*thunk)(), SCM (*err_filter)(), void * closure)
#else
SCM
scm_call_catching_errors (thunk, err_filter, closure)
SCM (*thunk)();
SCM (*err_filter)();
void * closure;
#endif
{
SCM answer;
setjmp_type i;
i = setjmp (SCM_JMPBUF (scm_rootcont));
if (!i)
{
scm_gc_heap_lock = 0;
answer = thunk (closure);
}
else
{
scm_gc_heap_lock = 1;
answer = err_filter (scm_exitval, closure);
}
return answer;
}