summaryrefslogtreecommitdiff
path: root/libguile/root.c
diff options
context:
space:
mode:
Diffstat (limited to 'libguile/root.c')
-rw-r--r--libguile/root.c101
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;
+}
+
+
+
+
+