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#ifndef SCM_WEAK_TABLE_H
#define SCM_WEAK_TABLE_H
/* Copyright 2011-2012,2018
Free Software Foundation, Inc.
This file is part of Guile.
Guile is free software: you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Guile is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public
License along with Guile. If not, see
<https://www.gnu.org/licenses/>. */
#include "libguile/scm.h"
/* The weak table API is currently only used internally. We could make it
public later, after some API review. */
typedef enum {
SCM_WEAK_TABLE_KIND_KEY,
SCM_WEAK_TABLE_KIND_VALUE,
SCM_WEAK_TABLE_KIND_BOTH,
} scm_t_weak_table_kind;
/* Function that returns nonzero if the given mapping is the one we are
looking for. */
typedef int (*scm_t_table_predicate_fn) (SCM k, SCM v, void *closure);
/* Function to fold over the elements of a set. */
typedef SCM (*scm_t_table_fold_fn) (void *closure, SCM k, SCM v, SCM result);
SCM_INTERNAL SCM scm_c_make_weak_table (unsigned long k,
scm_t_weak_table_kind kind);
SCM_INTERNAL SCM scm_weak_table_p (SCM h);
SCM_INTERNAL SCM scm_c_weak_table_ref (SCM table, unsigned long raw_hash,
scm_t_table_predicate_fn pred,
void *closure, SCM dflt);
SCM_INTERNAL void scm_c_weak_table_put_x (SCM table, unsigned long raw_hash,
scm_t_table_predicate_fn pred,
void *closure, SCM key, SCM value);
SCM_INTERNAL void scm_c_weak_table_remove_x (SCM table, unsigned long raw_hash,
scm_t_table_predicate_fn pred,
void *closure);
SCM_INTERNAL SCM scm_weak_table_refq (SCM table, SCM key, SCM dflt);
SCM_INTERNAL void scm_weak_table_putq_x (SCM table, SCM key, SCM value);
SCM_INTERNAL void scm_weak_table_remq_x (SCM table, SCM key);
SCM_INTERNAL void scm_weak_table_clear_x (SCM table);
SCM_INTERNAL SCM scm_c_weak_table_fold (scm_t_table_fold_fn proc, void *closure,
SCM init, SCM table);
SCM_INTERNAL SCM scm_weak_table_fold (SCM proc, SCM init, SCM table);
SCM_INTERNAL void scm_weak_table_for_each (SCM proc, SCM table);
SCM_INTERNAL SCM scm_weak_table_map_to_list (SCM proc, SCM table);
/* Legacy interface. */
SCM_API SCM scm_make_weak_key_hash_table (SCM k);
SCM_API SCM scm_make_weak_value_hash_table (SCM k);
SCM_API SCM scm_make_doubly_weak_hash_table (SCM k);
SCM_API SCM scm_weak_key_hash_table_p (SCM h);
SCM_API SCM scm_weak_value_hash_table_p (SCM h);
SCM_API SCM scm_doubly_weak_hash_table_p (SCM h);
SCM_INTERNAL void scm_i_weak_table_print (SCM exp, SCM port, scm_print_state *pstate);
SCM_INTERNAL void scm_weak_table_prehistory (void);
SCM_INTERNAL void scm_init_weak_table (void);
#endif /* SCM_WEAK_TABLE_H */
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