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/*
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* Copyright 2010-2011 Samy Al Bahra.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _CK_HP_H
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#define _CK_HP_H
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#include <ck_cc.h>
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#include <ck_pr.h>
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#include <ck_stack.h>
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#ifndef CK_HP_CACHE
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#define CK_HP_CACHE 512
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#endif
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struct ck_hp_hazard;
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typedef void (*ck_hp_destructor_t)(void *);
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struct ck_hp {
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ck_stack_t subscribers;
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unsigned int n_subscribers;
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unsigned int n_free;
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unsigned int threshold;
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unsigned int degree;
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ck_hp_destructor_t destroy;
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};
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typedef struct ck_hp ck_hp_t;
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struct ck_hp_hazard {
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void *pointer;
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void *data;
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ck_stack_entry_t pending_entry;
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};
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typedef struct ck_hp_hazard ck_hp_hazard_t;
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enum {
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CK_HP_USED = 0,
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CK_HP_FREE = 1
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};
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struct ck_hp_record {
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int state;
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void **pointers;
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void *cache[CK_HP_CACHE];
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struct ck_hp *global;
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ck_stack_t pending;
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unsigned int n_pending;
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ck_stack_entry_t global_entry;
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};
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typedef struct ck_hp_record ck_hp_record_t;
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CK_CC_INLINE static void
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ck_hp_set(struct ck_hp_record *record, unsigned int i, void *pointer)
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{
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ck_pr_store_ptr(&record->pointers[i], pointer);
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return;
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}
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CK_CC_INLINE static void
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ck_hp_clear(struct ck_hp_record *record)
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{
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void **pointers = record->pointers;
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unsigned int i;
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for (i = 0; i < record->global->degree; i++)
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*pointers++ = NULL;
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return;
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}
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void ck_hp_init(ck_hp_t *, unsigned int, unsigned int, ck_hp_destructor_t);
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void ck_hp_set_threshold(ck_hp_t *, unsigned int);
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void ck_hp_register(ck_hp_t *, ck_hp_record_t *, void **);
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void ck_hp_unregister(ck_hp_record_t *);
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ck_hp_record_t *ck_hp_recycle(ck_hp_t *);
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void ck_hp_flush(ck_hp_record_t *);
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void ck_hp_free(ck_hp_record_t *, ck_hp_hazard_t *, void *, void *);
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void ck_hp_retire(ck_hp_record_t *, ck_hp_hazard_t *, void *, void *);
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#endif /* _CK_HP_H */
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