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77 lines
2.6 KiB
77 lines
2.6 KiB
/*
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* Copyright 2011-2015 Formal Methods and Tools, University of Twente
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <sylvan_config.h>
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#include <stdint.h> // for uint32_t etc
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#ifndef REFS_INLINE_H
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#define REFS_INLINE_H
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/**
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* Implementation of external references
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* Based on a hash table for 40-bit non-null values, linear probing
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* Use tombstones for deleting, higher bits for reference count
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*/
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typedef struct
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{
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uint64_t *refs_table; // table itself
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size_t refs_size; // number of buckets
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/* helpers during resize operation */
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volatile uint32_t refs_control; // control field
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uint64_t *refs_resize_table; // previous table
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size_t refs_resize_size; // size of previous table
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size_t refs_resize_part; // which part is next
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size_t refs_resize_done; // how many parts are done
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} refs_table_t;
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// Count number of unique entries (not number of references)
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size_t refs_count(refs_table_t *tbl);
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// Increase or decrease reference to 40-bit value a
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// Will fail (assertion) if more down than up are called for a
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void refs_up(refs_table_t *tbl, uint64_t a);
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void refs_down(refs_table_t *tbl, uint64_t a);
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// Return a bucket or NULL to start iterating
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uint64_t *refs_iter(refs_table_t *tbl, size_t first, size_t end);
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// Continue iterating, set bucket to next bucket or NULL
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uint64_t refs_next(refs_table_t *tbl, uint64_t **bucket, size_t end);
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// User must supply a pointer, refs_create and refs_free handle initialization/destruction
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void refs_create(refs_table_t *tbl, size_t _refs_size);
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void refs_free(refs_table_t *tbl);
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// The same, but now for 64-bit values ("protect pointers")
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size_t protect_count(refs_table_t *tbl);
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void protect_up(refs_table_t *tbl, uint64_t a);
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void protect_down(refs_table_t *tbl, uint64_t a);
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uint64_t *protect_iter(refs_table_t *tbl, size_t first, size_t end);
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uint64_t protect_next(refs_table_t *tbl, uint64_t **bucket, size_t end);
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void protect_create(refs_table_t *tbl, size_t _refs_size);
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void protect_free(refs_table_t *tbl);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif
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