1/*
2 * Copyright 2013-2015 Samy Al Bahra
3 * Copyright 2013-2014 AppNexus, Inc.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#ifndef CK_ARRAY_H
29#define CK_ARRAY_H
30
31#include <ck_cc.h>
32#include <ck_malloc.h>
33#include <ck_pr.h>
34#include <ck_stdbool.h>
35#include <ck_stddef.h>
36
37struct _ck_array {
38	unsigned int n_committed;
39	unsigned int length;
40	void *values[];
41};
42
43struct ck_array {
44	struct ck_malloc *allocator;
45	struct _ck_array *active;
46	unsigned int n_entries;
47	struct _ck_array *transaction;
48};
49typedef struct ck_array ck_array_t;
50
51struct ck_array_iterator {
52	struct _ck_array *snapshot;
53};
54typedef struct ck_array_iterator ck_array_iterator_t;
55
56#define CK_ARRAY_MODE_SPMC 0U
57#define CK_ARRAY_MODE_MPMC (void) /* Unsupported. */
58
59bool ck_array_init(ck_array_t *, unsigned int, struct ck_malloc *, unsigned int);
60bool ck_array_commit(ck_array_t *);
61bool ck_array_put(ck_array_t *, void *);
62int ck_array_put_unique(ck_array_t *, void *);
63bool ck_array_remove(ck_array_t *, void *);
64void ck_array_deinit(ck_array_t *, bool);
65
66CK_CC_INLINE static unsigned int
67ck_array_length(struct ck_array *array)
68{
69	struct _ck_array *a = ck_pr_load_ptr(&array->active);
70
71	ck_pr_fence_load();
72	return ck_pr_load_uint(&a->n_committed);
73}
74
75CK_CC_INLINE static void *
76ck_array_buffer(struct ck_array *array, unsigned int *length)
77{
78	struct _ck_array *a = ck_pr_load_ptr(&array->active);
79
80	ck_pr_fence_load();
81	*length = ck_pr_load_uint(&a->n_committed);
82	return a->values;
83}
84
85CK_CC_INLINE static bool
86ck_array_initialized(struct ck_array *array)
87{
88
89	return ck_pr_load_ptr(&array->active) != NULL;
90}
91
92#define CK_ARRAY_FOREACH(a, i, b)		   	\
93	(i)->snapshot = ck_pr_load_ptr(&(a)->active);	\
94	ck_pr_fence_load();				\
95	for (unsigned int _ck_i = 0;		   	\
96	    _ck_i < (a)->active->n_committed &&		\
97	    ((*b) = (a)->active->values[_ck_i], 1);	\
98	    _ck_i++)
99
100#endif /* CK_ARRAY_H */
101