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
|
/*
* Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#if defined(_WIN32)
# include <windows.h>
#endif
#include <openssl/crypto.h>
#if defined(OPENSSL_THREADS) && !defined(CRYPTO_TDEBUG) && defined(OPENSSL_SYS_WINDOWS)
CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void)
{
CRYPTO_RWLOCK *lock;
if ((lock = OPENSSL_zalloc(sizeof(CRITICAL_SECTION))) == NULL) {
/* Don't set error, to avoid recursion blowup. */
return NULL;
}
#if !defined(_WIN32_WCE)
/* 0x400 is the spin count value suggested in the documentation */
if (!InitializeCriticalSectionAndSpinCount(lock, 0x400)) {
OPENSSL_free(lock);
return NULL;
}
#else
InitializeCriticalSection(lock);
#endif
return lock;
}
int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
{
EnterCriticalSection(lock);
return 1;
}
int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
{
EnterCriticalSection(lock);
return 1;
}
int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock)
{
LeaveCriticalSection(lock);
return 1;
}
void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock)
{
if (lock == NULL)
return;
DeleteCriticalSection(lock);
OPENSSL_free(lock);
return;
}
# define ONCE_UNINITED 0
# define ONCE_ININIT 1
# define ONCE_DONE 2
/*
* We don't use InitOnceExecuteOnce because that isn't available in WinXP which
* we still have to support.
*/
int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
{
LONG volatile *lock = (LONG *)once;
LONG result;
if (*lock == ONCE_DONE)
return 1;
do {
result = InterlockedCompareExchange(lock, ONCE_ININIT, ONCE_UNINITED);
if (result == ONCE_UNINITED) {
init();
*lock = ONCE_DONE;
return 1;
}
} while (result == ONCE_ININIT);
return (*lock == ONCE_DONE);
}
int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *))
{
*key = TlsAlloc();
if (*key == TLS_OUT_OF_INDEXES)
return 0;
return 1;
}
void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL *key)
{
DWORD last_error;
void *ret;
/*
* TlsGetValue clears the last error even on success, so that callers may
* distinguish it successfully returning NULL or failing. It is documented
* to never fail if the argument is a valid index from TlsAlloc, so we do
* not need to handle this.
*
* However, this error-mangling behavior interferes with the caller's use of
* GetLastError. In particular SSL_get_error queries the error queue to
* determine whether the caller should look at the OS's errors. To avoid
* destroying state, save and restore the Windows error.
*
* https://msdn.microsoft.com/en-us/library/windows/desktop/ms686812(v=vs.85).aspx
*/
last_error = GetLastError();
ret = TlsGetValue(*key);
SetLastError(last_error);
return ret;
}
int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL *key, void *val)
{
if (TlsSetValue(*key, val) == 0)
return 0;
return 1;
}
int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key)
{
if (TlsFree(*key) == 0)
return 0;
return 1;
}
CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void)
{
return GetCurrentThreadId();
}
int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b)
{
return (a == b);
}
int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
{
*ret = InterlockedExchangeAdd(val, amount) + amount;
return 1;
}
int openssl_init_fork_handlers(void)
{
return 0;
}
#endif
|