-/*
- protected-scm.cc -- implement Protected_scm
-
+/*
+ protected-scm.cc -- implement Protected_scm
+
source file of the GNU LilyPond music typesetter
-
- (c) 1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
-#include "protected-scm.hh"
-extern "C"
-{
-#include <libguile/gc.h>
-};
+ (c) 1998--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
+
+#include "protected-scm.hh"
Protected_scm::Protected_scm ()
{
- object_ = 0;
+ object_ = SCM_UNDEFINED;
}
Protected_scm::Protected_scm (SCM s)
{
- object_ = s ? scm_protect_object (s): 0;
+ object_ = SCM_NIMP (s) ? scm_gc_protect_object (s) : s;
}
Protected_scm::Protected_scm (Protected_scm const &s)
{
- object_ = s.object_ ? scm_protect_object (s.object_) : 0;
+ object_ = (SCM_NIMP (s.object_) ? scm_gc_protect_object (s.object_)
+ : s.object_);
}
-Protected_scm &
-Protected_scm::operator =(Protected_scm const &s)
+Protected_scm::~Protected_scm ()
{
- if (this == &s)
+ if (SCM_NIMP (object_))
+ scm_gc_unprotect_object (object_);
+}
+
+Protected_scm &
+Protected_scm::operator = (SCM s)
+{
+ if (object_ == s)
return *this;
- if (object_)
- scm_unprotect_object(object_);
- object_ = (s.object_) ? scm_protect_object (s.object_): 0;
+ if (SCM_NIMP (object_))
+ scm_gc_unprotect_object (object_);
+
+ object_ = SCM_NIMP (s) ? scm_gc_protect_object (s) : s;
return *this;
}
-Protected_scm::~Protected_scm ()
+Protected_scm &
+Protected_scm::operator = (Protected_scm const &s)
{
- if (object_)
- {
- scm_unprotect_object (object_);
- object_ =0L; // be nice to conservative GC
- }
+ return operator = (s.object_);
}
Protected_scm::operator SCM () const
return object_;
}
-SCM
+SCM
Protected_scm::to_SCM () const
{
return object_;