aboutsummaryrefslogtreecommitdiffstats
path: root/libparc/parc/concurrent/parc_AtomicUint64.c
blob: 35d5cf66cbed4eb97dd1ae51cf5c8c3ab381eb6e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
/*
 * Copyright (c) 2017 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 */
#include <config.h>

#include <parc/algol/parc_Object.h>
#include <parc/algol/parc_DisplayIndented.h>

#include <parc/concurrent/parc_AtomicUint64.h>

struct PARCAtomicUint64 {
    uint64_t value;
#ifdef PARCLibrary_DISABLE_ATOMICS
    pthread_mutex_t mutex;
#endif
};

static void
_parcAtomicUint64_Finalize(PARCAtomicUint64 **instancePtr)
{
    assertNotNull(instancePtr, "Parameter must be a non-null pointer to a PARCAtomicUint64 pointer.");

    parcAtomicUint64_OptionalAssertValid((*instancePtr));

    /* cleanup the instance fields here */
}

parcObject_ImplementAcquire(parcAtomicUint64, PARCAtomicUint64);

parcObject_ImplementRelease(parcAtomicUint64, PARCAtomicUint64);

parcObject_ExtendPARCObject(PARCAtomicUint64, _parcAtomicUint64_Finalize, parcAtomicUint64_Copy, NULL, parcAtomicUint64_Equals, parcAtomicUint64_Compare, parcAtomicUint64_HashCode, NULL);


void
parcAtomicUint64_AssertValid(const PARCAtomicUint64 *instance)
{
    assertTrue(parcAtomicUint64_IsValid(instance),
               "PARCAtomicUint64 is not valid.");
}

PARCAtomicUint64 *
parcAtomicUint64_Create(uint64_t value)
{
    PARCAtomicUint64 *result = parcObject_CreateAndClearInstance(PARCAtomicUint64);

#ifdef PARCLibrary_DISABLE_ATOMICS
    pthread_mutex_init(&result->mutex, NULL);
    result->value = value;
#else
    *result = value;
#endif

    return result;
}

int
parcAtomicUint64_Compare(const PARCAtomicUint64 *instance, const PARCAtomicUint64 *other)
{
    int64_t comparison = parcAtomicUint64_GetValue(instance) - parcAtomicUint64_GetValue(other);

    int result = 0;
    if (comparison < 0) {
        result = -1;
    } else if (comparison > 0) {
        result = 1;
    }

    return result;
}

PARCAtomicUint64 *
parcAtomicUint64_Copy(const PARCAtomicUint64 *original)
{
    PARCAtomicUint64 *result = parcAtomicUint64_Create(parcAtomicUint64_GetValue(original));

    return result;
}

bool
parcAtomicUint64_Equals(const PARCAtomicUint64 *x, const PARCAtomicUint64 *y)
{
    bool result = false;

    result = parcAtomicUint64_GetValue(x) == parcAtomicUint64_GetValue(y);

    return result;
}

PARCHashCode
parcAtomicUint64_HashCode(const PARCAtomicUint64 *instance)
{
    PARCHashCode result = (PARCHashCode) parcAtomicUint64_GetValue(instance);

    return result;
}

bool
parcAtomicUint64_IsValid(const PARCAtomicUint64 *instance)
{
    bool result = false;

    if (instance != NULL) {
        result = true;
    }

    return result;
}

uint64_t
parcAtomicUint64_GetValue(const PARCAtomicUint64 *instance)
{
#ifdef PARCLibrary_DISABLE_ATOMICS
    return instance->value;
#else
    return *instance;
#endif
}

uint64_t
parcAtomicUint64_AddImpl(PARCAtomicUint64 *value, uint64_t addend)
{
#ifdef PARCLibrary_DISABLE_ATOMICS
    pthread_mutex_lock(&value->mutex);
    value->value += addend;
    uint64_t result = value->value;
    pthread_mutex_unlock(&value->mutex);
    return result;
#else
    return __sync_add_and_fetch(value, addend);
#endif
}

uint64_t
parcAtomicUint64_SubtractImpl(PARCAtomicUint64 *value, uint64_t subtrahend)
{
#ifdef PARCLibrary_DISABLE_ATOMICS
    pthread_mutex_lock(&value->mutex);
    value->value -= subtrahend;
    uint64_t result = value->value;
    pthread_mutex_unlock(&value->mutex);
    return result;
#else
    return __sync_sub_and_fetch(value, subtrahend);
#endif
}

bool
parcAtomicUint64_CompareAndSwapImpl(PARCAtomicUint64 *value, uint64_t predicate, uint64_t newValue)
{
    bool result = false;
#ifdef PARCLibrary_DISABLE_ATOMICS
    pthread_mutex_lock(&value->mutex);
    if (value->value == predicate) {
        value->value = newValue;
        result = true;
    }
    pthread_mutex_unlock(&value->mutex);
    return result;
#else
    result = __sync_bool_compare_and_swap(value, predicate, newValue);
#endif
    return result;
}