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Diffstat (limited to 'libguile/root.c')
-rw-r--r-- | libguile/root.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/libguile/root.c b/libguile/root.c new file mode 100644 index 000000000..9db2e9b18 --- /dev/null +++ b/libguile/root.c @@ -0,0 +1,101 @@ +/* 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; +} + + + + + |