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
37 struct _ck_array {
38 unsigned int n_committed;
39 unsigned int length;
40 void *values[];
41 };
42
43 struct ck_array {
44 struct ck_malloc *allocator;
45 struct _ck_array *active;
46 unsigned int n_entries;
47 struct _ck_array *transaction;
48 };
49 typedef struct ck_array ck_array_t;
50
51 struct ck_array_iterator {
52 struct _ck_array *snapshot;
53 };
54 typedef 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
59 bool ck_array_init(ck_array_t *, unsigned int, struct ck_malloc *, unsigned int);
60 bool ck_array_commit(ck_array_t *);
61 bool ck_array_put(ck_array_t *, void *);
62 int ck_array_put_unique(ck_array_t *, void *);
63 bool ck_array_remove(ck_array_t *, void *);
64 void ck_array_deinit(ck_array_t *, bool);
65
66 CK_CC_INLINE static unsigned int
ck_array_length(struct ck_array * array)67 ck_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
75 CK_CC_INLINE static void *
ck_array_buffer(struct ck_array * array,unsigned int * length)76 ck_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
85 CK_CC_INLINE static bool
ck_array_initialized(struct ck_array * array)86 ck_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