2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2005--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
23 // Contains generic template definitions. With GCC, it is just
24 // included from smobs.hh, but other template expansion systems might
25 // make it feasible to compile this only a single time.
27 #include "lily-guile-macros.hh"
31 template <class Super>
33 Smob_base<Super>::mark_trampoline (SCM arg)
35 return (Super::unsmob (arg))->mark_smob ();
38 template <class Super>
40 Smob_base<Super>::register_ptr (Super *p)
42 // Don't use SCM_RETURN_NEWSMOB since that would require us to
43 // first register the memory and then create the smob. That would
44 // announce the memory as being GC-controlled before even
45 // allocating the controlling smob.
46 SCM s = SCM_UNDEFINED;
47 SCM_NEWSMOB (s, smob_tag (), p);
48 scm_gc_register_collectable_memory (p, sizeof (*p), smob_name_.c_str ());
52 // Defaults, should not actually get called
53 template <class Super>
55 Smob_base<Super>::mark_smob ()
57 return SCM_UNSPECIFIED;
60 template <class Super>
62 Smob_base<Super>::free_smob (SCM)
67 template <class Super>
69 Smob_base<Super>::equal_p (SCM, SCM)
74 // Default, will often get called
76 template <class Super>
78 Smob_base<Super>::print_smob (SCM, SCM p, scm_print_state *)
81 scm_puts (smob_name_.c_str (), p);
86 template <class Super>
88 Smob_base<Super>::unregister_ptr (SCM obj)
90 Super *p = Super::unchecked_unsmob (obj);
91 scm_gc_unregister_collectable_memory (p, sizeof (*p), smob_name_.c_str ());
95 template <class Super>
96 scm_t_bits Smob_base<Super>::smob_tag_ = 0;
98 template <class Super>
99 Scm_init Smob_base<Super>::scm_init_ = init;
101 template <class Super>
102 string Smob_base<Super>::smob_name_;
104 template <class Super>
105 void Smob_base<Super>::init ()
107 smob_name_ = typeid (Super).name ();
108 // Primitive demangling, suitable for GCC, should be harmless
109 // elsewhere. The worst that can happen is that we get material
110 // unsuitable for Texinfo documentation. If that proves to be an
111 // issue, we need some smarter strategy.
112 smob_name_ = smob_name_.substr (smob_name_.find_first_not_of ("0123456789"));
114 smob_tag_ = scm_make_smob_type (smob_name_.c_str (), 0);
115 // The following have trivial private default definitions not
116 // referring to any aspect of the Super class apart from its name.
117 // They should be overridden (or rather masked) at Super level: that
118 // way they can refer to Super-private data.
119 // While that's not a consideration for type_p_name_, it's easier
120 // doing it like the rest.
122 if (&Super::free_smob != &Smob_base<Super>::free_smob)
123 scm_set_smob_free (smob_tag_, Super::free_smob);
124 if (&Super::mark_smob != &Smob_base<Super>::mark_smob)
125 scm_set_smob_mark (smob_tag_, Super::mark_trampoline);
126 scm_set_smob_print (smob_tag_, Super::print_smob);
127 if (&Super::equal_p != &Smob_base<Super>::equal_p)
128 scm_set_smob_equalp (smob_tag_, Super::equal_p);
129 if (Super::type_p_name_ != 0)
131 SCM subr = scm_c_define_gsubr (Super::type_p_name_, 1, 0, 0,
132 (scm_t_subr) smob_p);
133 string fundoc = string("Is @var{x} a @code{") + smob_name_
135 ly_add_function_documentation (subr, Super::type_p_name_, "(SCM x)",
137 scm_c_export (Super::type_p_name_, NULL);
139 ly_add_type_predicate ((void *) is_smob, smob_name_.c_str ());
140 if (Super::smob_proc_signature_ >= 0)
141 scm_set_smob_apply (smob_tag_,
142 (scm_t_subr)Super::smob_proc,
143 Super::smob_proc_signature_ >> 8,
144 (Super::smob_proc_signature_ >> 4)&0xf,
145 Super::smob_proc_signature_ & 0xf);