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1bbf7f7580
* libguile/smob.h: * libguile/smob.c (scm_smob_type_class): New function, to access the GOOPS class for a SMOB type.
209 lines
7.6 KiB
C
209 lines
7.6 KiB
C
/* classes: h_files */
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#ifndef SCM_SMOB_H
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#define SCM_SMOB_H
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/* Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2004, 2006, 2009,
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* 2010, 2011, 2012, 2015 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 3 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#include "libguile/__scm.h"
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#include "libguile/print.h"
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/* This is the internal representation of a smob type */
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typedef struct scm_smob_descriptor
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{
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char const *name;
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size_t size;
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SCM (*mark) (SCM);
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size_t (*free) (SCM);
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int (*print) (SCM exp, SCM port, scm_print_state *pstate);
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SCM (*equalp) (SCM, SCM);
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scm_t_subr apply;
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SCM apply_trampoline;
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} scm_smob_descriptor;
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#define SCM_SMOB_TYPE_MASK 0xffff
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#define SCM_SMOB_TYPE_BITS(tc) (tc)
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#define SCM_TC2SMOBNUM(x) (0x0ff & ((x) >> 8))
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#define SCM_SMOBNUM(x) (SCM_TC2SMOBNUM (SCM_CELL_TYPE (x)))
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/* SCM_SMOBNAME can be 0 if name is missing */
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#define SCM_SMOBNAME(smobnum) (scm_smobs[smobnum].name)
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#define SCM_SMOB_PREDICATE(tag, obj) SCM_HAS_TYP16 (obj, tag)
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#define SCM_SMOB_DESCRIPTOR(x) (scm_smobs[SCM_SMOBNUM (x)])
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#define SCM_SMOB_APPLICABLE_P(x) (SCM_SMOB_DESCRIPTOR (x).apply)
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/* Maximum number of SMOB types. */
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#define SCM_I_MAX_SMOB_TYPE_COUNT 256
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SCM_API long scm_numsmob;
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SCM_API scm_smob_descriptor scm_smobs[];
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SCM_API SCM scm_i_new_smob (scm_t_bits tc, scm_t_bits);
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SCM_API SCM scm_i_new_double_smob (scm_t_bits tc, scm_t_bits,
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scm_t_bits, scm_t_bits);
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SCM_INLINE SCM scm_new_smob (scm_t_bits tc, scm_t_bits);
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SCM_INLINE SCM scm_new_double_smob (scm_t_bits tc, scm_t_bits,
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scm_t_bits, scm_t_bits);
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#if SCM_CAN_INLINE || defined SCM_INLINE_C_IMPLEMENTING_INLINES
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SCM_INLINE_IMPLEMENTATION SCM
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scm_new_smob (scm_t_bits tc, scm_t_bits data)
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{
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scm_t_bits smobnum = SCM_TC2SMOBNUM (tc);
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if (SCM_UNLIKELY (scm_smobs[smobnum].mark || scm_smobs[smobnum].free))
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return scm_i_new_smob (tc, data);
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else
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return scm_cell (tc, data);
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}
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SCM_INLINE_IMPLEMENTATION SCM
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scm_new_double_smob (scm_t_bits tc, scm_t_bits data1,
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scm_t_bits data2, scm_t_bits data3)
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{
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scm_t_bits smobnum = SCM_TC2SMOBNUM (tc);
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if (SCM_UNLIKELY (scm_smobs[smobnum].mark || scm_smobs[smobnum].free))
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return scm_i_new_double_smob (tc, data1, data2, data3);
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else
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return scm_double_cell (tc, data1, data2, data3);
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}
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#endif
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#define SCM_NEWSMOB(z, tc, data) \
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z = scm_new_smob ((tc), (scm_t_bits)(data))
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#define SCM_RETURN_NEWSMOB(tc, data) \
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return scm_new_smob ((tc), (scm_t_bits)(data))
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#define SCM_NEWSMOB2(z, tc, data1, data2) \
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z = scm_new_double_smob ((tc), (scm_t_bits)(data1), \
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(scm_t_bits)(data2), 0)
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#define SCM_RETURN_NEWSMOB2(tc, data1, data2) \
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return scm_new_double_smob ((tc), (scm_t_bits)(data1), \
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(scm_t_bits)(data2), 0)
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#define SCM_NEWSMOB3(z, tc, data1, data2, data3) \
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z = scm_new_double_smob ((tc), (scm_t_bits)(data1), \
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(scm_t_bits)(data2), (scm_t_bits)(data3))
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#define SCM_RETURN_NEWSMOB3(tc, data1, data2, data3) \
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return scm_new_double_smob ((tc), (scm_t_bits)(data1), \
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(scm_t_bits)(data2), (scm_t_bits)(data3))
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#define SCM_SMOB_DATA_N(x, n) (SCM_CELL_WORD ((x), (n)))
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#define SCM_SET_SMOB_DATA_N(x, n, data) (SCM_SET_CELL_WORD ((x), (n), (data)))
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#define SCM_SMOB_DATA_0(x) (SCM_SMOB_DATA_N ((x), 0))
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#define SCM_SMOB_DATA_1(x) (SCM_SMOB_DATA_N ((x), 1))
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#define SCM_SMOB_DATA_2(x) (SCM_SMOB_DATA_N ((x), 2))
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#define SCM_SMOB_DATA_3(x) (SCM_SMOB_DATA_N ((x), 3))
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#define SCM_SET_SMOB_DATA_0(x, data) (SCM_SET_SMOB_DATA_N ((x), 0, (data)))
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#define SCM_SET_SMOB_DATA_1(x, data) (SCM_SET_SMOB_DATA_N ((x), 1, (data)))
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#define SCM_SET_SMOB_DATA_2(x, data) (SCM_SET_SMOB_DATA_N ((x), 2, (data)))
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#define SCM_SET_SMOB_DATA_3(x, data) (SCM_SET_SMOB_DATA_N ((x), 3, (data)))
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#define SCM_SMOB_FLAGS(x) (SCM_SMOB_DATA_0 (x) >> 16)
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#define SCM_SMOB_DATA(x) (SCM_SMOB_DATA_1 (x))
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#define SCM_SET_SMOB_FLAGS(x, data) (SCM_SET_SMOB_DATA_0 ((x), (SCM_CELL_TYPE (x)&0xffff)|((data)<<16)))
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#define SCM_SET_SMOB_DATA(x, data) (SCM_SET_SMOB_DATA_1 ((x), (data)))
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#define SCM_SMOB_OBJECT_N(x,n) (SCM_CELL_OBJECT ((x), (n)))
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#define SCM_SET_SMOB_OBJECT_N(x,n,obj) (SCM_SET_CELL_OBJECT ((x), (n), (obj)))
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#define SCM_SMOB_OBJECT_N_LOC(x,n) (SCM_CELL_OBJECT_LOC ((x), (n)))
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/*#define SCM_SMOB_OBJECT_0(x) (SCM_SMOB_OBJECT_N ((x), 0))*/
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#define SCM_SMOB_OBJECT_1(x) (SCM_SMOB_OBJECT_N ((x), 1))
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#define SCM_SMOB_OBJECT_2(x) (SCM_SMOB_OBJECT_N ((x), 2))
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#define SCM_SMOB_OBJECT_3(x) (SCM_SMOB_OBJECT_N ((x), 3))
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/*#define SCM_SET_SMOB_OBJECT_0(x,obj) (SCM_SET_SMOB_OBJECT_N ((x), 0, (obj)))*/
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#define SCM_SET_SMOB_OBJECT_1(x,obj) (SCM_SET_SMOB_OBJECT_N ((x), 1, (obj)))
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#define SCM_SET_SMOB_OBJECT_2(x,obj) (SCM_SET_SMOB_OBJECT_N ((x), 2, (obj)))
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#define SCM_SET_SMOB_OBJECT_3(x,obj) (SCM_SET_SMOB_OBJECT_N ((x), 3, (obj)))
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#define SCM_SMOB_OBJECT_0_LOC(x) (SCM_SMOB_OBJECT_N_LOC ((x), 0))
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#define SCM_SMOB_OBJECT_1_LOC(x) (SCM_SMOB_OBJECT_N_LOC ((x), 1))
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#define SCM_SMOB_OBJECT_2_LOC(x) (SCM_SMOB_OBJECT_N_LOC ((x), 2))
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#define SCM_SMOB_OBJECT_3_LOC(x) (SCM_SMOB_OBJECT_N_LOC ((x), 3))
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#define SCM_SMOB_OBJECT(x) (SCM_SMOB_OBJECT_1 (x))
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#define SCM_SET_SMOB_OBJECT(x,obj) (SCM_SET_SMOB_OBJECT_1 ((x), (obj)))
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#define SCM_SMOB_OBJECT_LOC(x) (SCM_SMOB_OBJECT_1_LOC (x))
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#define SCM_SMOB_APPLY_0(x) (scm_call_0 (x))
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#define SCM_SMOB_APPLY_1(x, a1) (scm_call_1 (x, a1))
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#define SCM_SMOB_APPLY_2(x, a1, a2) (scm_call_2 (x, a1, a2))
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#define SCM_SMOB_APPLY_3(x, a1, a2, rst) (scm_call_3 (x, a1, a2, a3))
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SCM_API SCM scm_mark0 (SCM ptr);
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SCM_API SCM scm_markcdr (SCM ptr);
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SCM_API size_t scm_free0 (SCM ptr);
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SCM_API int scm_smob_print (SCM exp, SCM port, scm_print_state *pstate);
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/* The following set of functions is the standard way to create new
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* SMOB types.
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*
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* Create a type tag using `scm_make_smob_type', accept default values
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* for mark, free, print and/or equalp functions, or set your own
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* values using `scm_set_smob_xxx'.
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*/
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SCM_API scm_t_bits scm_make_smob_type (char const *name, size_t size);
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SCM_API void scm_set_smob_mark (scm_t_bits tc, SCM (*mark) (SCM));
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SCM_API void scm_set_smob_free (scm_t_bits tc, size_t (*free) (SCM));
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SCM_API void scm_set_smob_print (scm_t_bits tc,
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int (*print) (SCM, SCM, scm_print_state*));
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SCM_API void scm_set_smob_equalp (scm_t_bits tc, SCM (*equalp) (SCM, SCM));
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SCM_API void scm_set_smob_apply (scm_t_bits tc,
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scm_t_subr apply,
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unsigned int req,
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unsigned int opt,
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unsigned int rst);
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SCM_API SCM scm_smob_type_class (scm_t_bits tc);
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SCM_API void scm_assert_smob_type (scm_t_bits tag, SCM val);
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/* Function for creating smobs */
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SCM_API SCM scm_make_smob (scm_t_bits tc);
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SCM_API void scm_smob_prehistory (void);
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#endif /* SCM_SMOB_H */
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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