-/*
- ly-smobs.icc -- implement smob glue.
-
+/*
+ ly-smobs.icc -- implement smob glue.
+
source file of the GNU LilyPond music typesetter
-
- (c) 1999--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+
+ (c) 1999--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
#ifndef LY_SMOBS_ICC
#define LY_SMOBS_ICC
-#ifndef SCM_PACK
-#define SCM_PACK(x) ((SCM) x)
-#endif
+#include "smobs.hh"
-#define IMPLEMENT_UNSMOB(CL, name) \
-CL * \
-unsmob_ ## name ( SCM s) \
-{ \
- if (SMOB_IS_TYPE_B(CL, s)) \
- return SMOB_TO_TYPE(CL, s); \
- else \
- return 0; \
-}\
-SCM smobify (CL *cl)\
-{\
- SCM s; \
- \
- SCM_NEWCELL(s); \
- SCM_SETCAR(s,CL::smob_tag_); \
- SCM me_s = SCM_PACK (cl); \
- SCM_SETCDR (s, me_s); \
-return s;\
-}\
+#define IMPLEMENT_TYPE_P(CL, FUNCNAME) \
+ SCM CL ## _type_p_proc; \
+ void init_type_ ## CL () \
+ { \
+ SCM subr = scm_c_define_gsubr (FUNCNAME, 1, 0, 0, \
+ (Scheme_function_unknown) CL::smob_p); \
+ CL ## _type_p_proc = subr; \
+ ly_add_function_documentation (subr, FUNCNAME, "(SCM x)", \
+ "Is @var{x} a @code{" #CL "} object?"); \
+ scm_c_export (FUNCNAME, NULL); \
+ } \
+ ADD_SCM_INIT_FUNC (init_type_ ## CL, init_type_ ## CL)
+#define IMPLEMENT_BASE_SMOBS(CL) \
+ void \
+ CL ## _type_adder () \
+ {\
+ ly_add_type_predicate ((void*) &CL::unsmob, #CL); \
+ }\
+ ADD_SCM_INIT_FUNC(CL ## _type_adder_ctor, \
+ CL ## _type_adder);\
+ const char *CL::smob_name_ = #CL; \
+ scm_t_bits CL::smob_tag_; \
+ SCM \
+ CL::smob_p (SCM s) \
+ { \
+ if (SCM_NIMP (s) && SCM_CELL_TYPE (s) == smob_tag_) \
+ return SCM_BOOL_T; \
+ else \
+ return SCM_BOOL_F; \
+ \
+ } \
+ \
+ void \
+ CL::init_smobs () \
+ { \
+ smob_tag_ = scm_make_smob_type (#CL, 0); \
+ scm_set_smob_mark (smob_tag_, CL::mark_smob); \
+ scm_set_smob_free (smob_tag_, CL::free_smob); \
+ scm_set_smob_print (smob_tag_, CL::print_smob); \
+ scm_set_smob_equalp (smob_tag_, CL::equal_p); \
+ } \
+ \
+ size_t \
+ CL::free_smob (SCM ses) \
+ { \
+ CL *s = (CL *) SCM_CELL_WORD_1 (ses); \
+ delete s; \
+ /* scm_gc_unregister_collectable_memory (s, sizeof (CL), #CL " smob"); */ \
+ return SMOB_FREE_RETURN_VAL (CL); \
+ } \
+ \
+ ADD_SCM_INIT_FUNC (CL, CL::init_smobs)
-/*
- should include equal_p ?
- */
-#define IMPLEMENT_SMOBS(CL)\
-long CL::smob_tag_;\
-static scm_smobfuns CL ## _funs = { \
- CL::mark_smob, CL::free_smob, \
- CL::print_smob, 0, \
-}; \
-void \
-CL::init_smobs () \
-{ \
- smob_tag_ = scm_newsmob (&CL ## _funs); \
-} \
+#define IMPLEMENT_SIMPLE_SMOBS(CL) \
+ IMPLEMENT_BASE_SMOBS (CL); \
+ SCM CL::smobbed_copy () const \
+ { \
+ CL *ptr = new CL (*this); \
+ SCM s; \
+ s = scm_cons (SCM_PACK (CL::smob_tag_), SCM_PACK (ptr)); \
+ scm_gc_register_collectable_memory ((CL *)this, sizeof (CL), #CL " smob"); \
\
- \
-void \
-CL::unsmobify_self () \
-{ \
- SCM s = self_scm_; \
- scm_unprotect_object (s); \
- \
- SCM_SETCAR (self_scm_, SCM_EOL); \
- SCM_SETCDR (self_scm_, SCM_EOL); \
- self_scm_ = SCM_EOL; \
-\
- scm_done_malloc ( - sizeof (CL));\
-} \
-\
-SCM \
-CL::smobify_self () \
-{ \
- if (self_scm_ != SCM_EOL) \
+ return s; \
+ }
+
+#define IMPLEMENT_SMOBS(CL) \
+ IMPLEMENT_BASE_SMOBS (CL) \
+ void \
+ CL::smobify_self () \
+ { \
+ protection_cons_ = SCM_EOL; \
+ self_scm_ = unprotected_smobify_self (); \
+ protect (); \
+ } \
+ void \
+ CL::protect () \
+ { \
+ protect_smob (self_scm_, &protection_cons_); \
+ } \
+ SCM \
+ CL::unprotect () \
+ { \
+ unprotect_smob (self_scm_, &protection_cons_); \
return self_scm_; \
+ } \
+ SCM \
+ CL::unprotected_smobify_self () \
+ { \
+ /* \
+ This is local. We don't assign to self_scm_ directly, to assure \
+ that S isn't GC-ed from under us. \
\
- /* \
- This is local. We don't assign to self_scm_ directly, to assure \
- that S isn't GC-ed from under us. \
- */ \
- SCM s = smobify (this); \
- self_scm_ = s; \
- scm_protect_object (s); \
- \
- scm_done_malloc(sizeof(CL));\
- do_smobify_self(); \
- return s; \
-} \
-scm_sizet \
-CL::free_smob (SCM ses) \
-{ \
- CL * s = (CL*) SCM_CDR(ses); \
- /* someone else did the deed already; this might be an automatic var.*/ \
- if (s->self_scm_ != ses)\
- return 0; \
-\
- /* no need to call scm_unprotect_object, since this call \
- implies that the object is not protected. */ \
- SCM_SETCAR (ses, SCM_EOL); \
- delete s;\
- return sizeof (CL);\
-} \
-ADD_SCM_INIT_FUNC(CL, CL::init_smobs)\
+ We don't use smobbed_self () to ensure that mark_smob () doesn't \
+ have to deal half-initialized objects: scm_done_malloc ( ) might \
+ trigger GC.the warning in smobs.hh is just to be doubleplus \
+ goodly sure \
+ */ \
+ SCM s; \
+ SCM_NEWSMOB (s, CL::smob_tag_, this); \
+ self_scm_ = s; \
+ scm_gc_register_collectable_memory (this, sizeof (CL), #CL " smob"); \
+ return s; \
+ }
+#define IMPLEMENT_DEFAULT_EQUAL_P(CL) \
+ SCM \
+ CL::equal_p (SCM a, SCM b) \
+ { \
+ return a == b ? SCM_BOOL_T : SCM_BOOL_F; \
+ }
#endif /* LY_SMOBS_ICC */
projects / lilypond.git / blobdiff