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threading.h
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1 
6 /*
7  * Copyright The Mbed TLS Contributors
8  * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
9  *
10  * This file is provided under the Apache License 2.0, or the
11  * GNU General Public License v2.0 or later.
12  *
13  * **********
14  * Apache License 2.0:
15  *
16  * Licensed under the Apache License, Version 2.0 (the "License"); you may
17  * not use this file except in compliance with the License.
18  * You may obtain a copy of the License at
19  *
20  * http://www.apache.org/licenses/LICENSE-2.0
21  *
22  * Unless required by applicable law or agreed to in writing, software
23  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
24  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
25  * See the License for the specific language governing permissions and
26  * limitations under the License.
27  *
28  * **********
29  *
30  * **********
31  * GNU General Public License v2.0 or later:
32  *
33  * This program is free software; you can redistribute it and/or modify
34  * it under the terms of the GNU General Public License as published by
35  * the Free Software Foundation; either version 2 of the License, or
36  * (at your option) any later version.
37  *
38  * This program is distributed in the hope that it will be useful,
39  * but WITHOUT ANY WARRANTY; without even the implied warranty of
40  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
41  * GNU General Public License for more details.
42  *
43  * You should have received a copy of the GNU General Public License along
44  * with this program; if not, write to the Free Software Foundation, Inc.,
45  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
46  *
47  * **********
48  */
49 #ifndef MBEDTLS_THREADING_H
50 #define MBEDTLS_THREADING_H
51 
52 #if !defined(MBEDTLS_CONFIG_FILE)
53 #include "config.h"
54 #else
55 #include MBEDTLS_CONFIG_FILE
56 #endif
57 
58 #include <stdlib.h>
59 
60 #ifdef __cplusplus
61 extern "C" {
62 #endif
63 
64 /* MBEDTLS_ERR_THREADING_FEATURE_UNAVAILABLE is deprecated and should not be
65  * used. */
66 #define MBEDTLS_ERR_THREADING_FEATURE_UNAVAILABLE -0x001A
68 #define MBEDTLS_ERR_THREADING_BAD_INPUT_DATA -0x001C
69 #define MBEDTLS_ERR_THREADING_MUTEX_ERROR -0x001E
71 #if defined(MBEDTLS_THREADING_PTHREAD)
72 #include <pthread.h>
73 typedef struct mbedtls_threading_mutex_t
74 {
75  pthread_mutex_t mutex;
76  /* is_valid is 0 after a failed init or a free, and nonzero after a
77  * successful init. This field is not considered part of the public
78  * API of Mbed TLS and may change without notice. */
79  char is_valid;
80 } mbedtls_threading_mutex_t;
81 #endif
82 
83 #if defined(MBEDTLS_THREADING_ALT)
84 /* You should define the mbedtls_threading_mutex_t type in your header */
85 #include "threading_alt.h"
86 
105 void mbedtls_threading_set_alt( void (*mutex_init)( mbedtls_threading_mutex_t * ),
106  void (*mutex_free)( mbedtls_threading_mutex_t * ),
107  int (*mutex_lock)( mbedtls_threading_mutex_t * ),
108  int (*mutex_unlock)( mbedtls_threading_mutex_t * ) );
109 
113 void mbedtls_threading_free_alt( void );
114 #endif /* MBEDTLS_THREADING_ALT */
115 
116 #if defined(MBEDTLS_THREADING_C)
117 /*
118  * The function pointers for mutex_init, mutex_free, mutex_ and mutex_unlock
119  *
120  * All these functions are expected to work or the result will be undefined.
121  */
122 extern void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t *mutex );
123 extern void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t *mutex );
124 extern int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t *mutex );
125 extern int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t *mutex );
126 
127 /*
128  * Global mutexes
129  */
130 #if defined(MBEDTLS_FS_IO)
131 extern mbedtls_threading_mutex_t mbedtls_threading_readdir_mutex;
132 #endif
133 
134 #if defined(MBEDTLS_HAVE_TIME_DATE) && !defined(MBEDTLS_PLATFORM_GMTIME_R_ALT)
135 /* This mutex may or may not be used in the default definition of
136  * mbedtls_platform_gmtime_r(), but in order to determine that,
137  * we need to check POSIX features, hence modify _POSIX_C_SOURCE.
138  * With the current approach, this declaration is orphaned, lacking
139  * an accompanying definition, in case mbedtls_platform_gmtime_r()
140  * doesn't need it, but that's not a problem. */
141 extern mbedtls_threading_mutex_t mbedtls_threading_gmtime_mutex;
142 #endif /* MBEDTLS_HAVE_TIME_DATE && !MBEDTLS_PLATFORM_GMTIME_R_ALT */
143 
144 #endif /* MBEDTLS_THREADING_C */
145 
146 #ifdef __cplusplus
147 }
148 #endif
149 
150 #endif /* threading.h */
struct png_info_def **typedef void(__cdecl typeof(png_destroy_read_struct))(struct png_struct_def **
Definition: typeof.h:49
static BOOL is_valid(HIMAGELIST himl)
Definition: imagelist.c:3998
#define mutex_lock(m)
Definition: reentrant.h:128
HANDLE mutex
Definition: loader.c:2140
#define mutex_unlock(m)
Definition: reentrant.h:129
#define mutex_init(m, a)
Definition: reentrant.h:127
unsigned int(__cdecl typeof(jpeg_read_scanlines))(struct jpeg_decompress_struct *
Definition: typeof.h:31