2 ly-smobs.icc -- implement smob glue.
4 source file of the GNU LilyPond music typesetter
6 (c) 1999--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
16 #define IMPLEMENT_TYPE_P(CL, FUNCNAME)\
17 void init_type_ ## CL ()\
19 scm_c_define_gsubr (FUNCNAME, 1, 0, 0, (Scheme_function_unknown) CL::smob_p);\
20 ly_add_function_documentation (FUNCNAME, "(SCM x)", "Check if @var{x} is a " #CL " object");\
21 scm_c_export (FUNCNAME, NULL);\
23 ADD_SCM_INIT_FUNC (init_type_ ## CL, init_type_ ## CL)
26 #define SCM_CELL_TYPE(X) SCM_CAR (X)
29 #ifndef SCM_CELL_WORD_1
30 #define SCM_CELL_WORD_1(X) SCM_CDR (X)
35 #define IMPLEMENT_SIMPLE_SMOBS(CL) \
36 scm_t_bits CL::smob_tag_; \
40 if (SCM_NIMP (s) && SCM_CELL_TYPE (s) == smob_tag_) \
49 smob_tag_ = scm_make_smob_type (#CL, 0); \
50 scm_set_smob_mark (smob_tag_, CL::mark_smob); \
51 scm_set_smob_free (smob_tag_, CL::free_smob); \
52 scm_set_smob_print (smob_tag_, CL::print_smob); \
53 scm_set_smob_equalp (smob_tag_, CL::equal_p); \
55 SCM CL::smobbed_self () const \
58 s = gh_cons (SCM_PACK (CL::smob_tag_), SCM_PACK (this)); \
59 scm_gc_register_collectable_memory ((CL*)this, sizeof (CL), #CL " smob"); \
64 CL::free_smob (SCM ses) \
66 CL * s = (CL*) SCM_CDR (ses); \
68 scm_gc_unregister_collectable_memory (s, sizeof (CL), #CL " smob"); \
69 return SMOB_FREE_RETURN_VAL(CL);\
71 ADD_SCM_INIT_FUNC (CL, CL::init_smobs)
73 #define IMPLEMENT_SMOBS(CL) \
74 IMPLEMENT_SIMPLE_SMOBS (CL) \
78 SCM s = unprotected_smobify_self ();\
79 scm_gc_protect_object (s);\
83 CL::unprotected_smobify_self () \
86 This is local. We don't assign to self_scm_ directly, to assure \
87 that S isn't GC-ed from under us. \
89 We don't use smobbed_self () to ensure that mark_smob () doesn't have to \
90 deal half-initialized objects: scm_done_malloc ( ) might trigger GC. \
91 the warning in smobs.hh is just to be doubleplus goodly sure \
94 SCM_NEWSMOB (s, CL::smob_tag_, this);\
96 scm_gc_register_collectable_memory (this, sizeof (CL), #CL " smob"); \
100 #define IMPLEMENT_DEFAULT_EQUAL_P(CL) \
102 CL::equal_p (SCM a , SCM b) \
104 return a == b ? SCM_BOOL_T : SCM_BOOL_F; \
108 #endif /* LY_SMOBS_ICC */