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
|
/* Copyright (c) 2015, Google Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
#include "internal.h"
#include <gtest/gtest.h>
#if defined(OPENSSL_THREADS)
#include <thread>
#endif
TEST(RefCountTest, Basic) {
CRYPTO_refcount_t count = 0;
CRYPTO_refcount_inc(&count);
EXPECT_EQ(1u, count);
EXPECT_TRUE(CRYPTO_refcount_dec_and_test_zero(&count));
EXPECT_EQ(0u, count);
count = CRYPTO_REFCOUNT_MAX;
CRYPTO_refcount_inc(&count);
EXPECT_EQ(CRYPTO_REFCOUNT_MAX, count)
<< "Count did not saturate correctly when incrementing.";
EXPECT_FALSE(CRYPTO_refcount_dec_and_test_zero(&count));
EXPECT_EQ(CRYPTO_REFCOUNT_MAX, count)
<< "Count did not saturate correctly when decrementing.";
count = 2;
EXPECT_FALSE(CRYPTO_refcount_dec_and_test_zero(&count));
EXPECT_EQ(1u, count);
}
#if defined(OPENSSL_THREADS)
// This test is primarily intended to run under ThreadSanitizer.
TEST(RefCountTest, Threads) {
CRYPTO_refcount_t count = 0;
// Race two increments.
{
std::thread thread([&] { CRYPTO_refcount_inc(&count); });
CRYPTO_refcount_inc(&count);
thread.join();
EXPECT_EQ(2u, count);
}
// Race an increment with a decrement.
{
std::thread thread([&] { CRYPTO_refcount_inc(&count); });
EXPECT_FALSE(CRYPTO_refcount_dec_and_test_zero(&count));
thread.join();
EXPECT_EQ(2u, count);
}
// Race two decrements.
{
bool thread_saw_zero;
std::thread thread(
[&] { thread_saw_zero = CRYPTO_refcount_dec_and_test_zero(&count); });
bool saw_zero = CRYPTO_refcount_dec_and_test_zero(&count);
thread.join();
EXPECT_EQ(0u, count);
// Exactly one thread should see zero.
EXPECT_NE(saw_zero, thread_saw_zero);
}
}
#endif
|
