PolarSSL v1.3.2
threading.c
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1 /*
2  * Threading abstraction layer
3  *
4  * Copyright (C) 2006-2013, Brainspark B.V.
5  *
6  * This file is part of PolarSSL (http://www.polarssl.org)
7  * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
8  *
9  * All rights reserved.
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License as published by
13  * the Free Software Foundation; either version 2 of the License, or
14  * (at your option) any later version.
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19  * GNU General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public License along
22  * with this program; if not, write to the Free Software Foundation, Inc.,
23  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24  */
25 
26 #include "polarssl/config.h"
27 
28 #if defined(POLARSSL_THREADING_C)
29 
30 #include "polarssl/threading.h"
31 
32 #if defined(POLARSSL_THREADING_DUMMY)
33 static int threading_mutex_init_dummy( threading_mutex_t *mutex )
34 {
35  ((void) mutex );
36  return( 0 );
37 }
38 
39 static int threading_mutex_free_dummy( threading_mutex_t *mutex )
40 {
41  ((void) mutex );
42  return( 0 );
43 }
44 
45 static int threading_mutex_lock_dummy( threading_mutex_t *mutex )
46 {
47  ((void) mutex );
48  return( 0 );
49 }
50 
51 static int threading_mutex_unlock_dummy( threading_mutex_t *mutex )
52 {
53  ((void) mutex );
54  return( 0 );
55 }
56 
57 int (*polarssl_mutex_init)( threading_mutex_t * ) = threading_mutex_init_dummy;
58 int (*polarssl_mutex_free)( threading_mutex_t * ) = threading_mutex_free_dummy;
59 int (*polarssl_mutex_lock)( threading_mutex_t * ) = threading_mutex_lock_dummy;
60 int (*polarssl_mutex_unlock)( threading_mutex_t * ) = threading_mutex_unlock_dummy;
61 #endif /* POLARSSL_THREADING_DUMMY */
62 
63 #if defined(POLARSSL_THREADING_PTHREAD)
64 static int threading_mutex_init_pthread( threading_mutex_t *mutex )
65 {
66  if( mutex == NULL )
68 
69  if( pthread_mutex_init( mutex, NULL ) != 0 )
71 
72  return( 0 );
73 }
74 
75 static int threading_mutex_free_pthread( threading_mutex_t *mutex )
76 {
77  if( mutex == NULL )
79 
80  if( pthread_mutex_destroy( mutex ) != 0 )
82 
83  return( 0 );
84 }
85 
86 static int threading_mutex_lock_pthread( threading_mutex_t *mutex )
87 {
88  if( mutex == NULL )
90 
91  if( pthread_mutex_lock( mutex ) != 0 )
93 
94  return( 0 );
95 }
96 
97 static int threading_mutex_unlock_pthread( threading_mutex_t *mutex )
98 {
99  if( mutex == NULL )
101 
102  if( pthread_mutex_unlock( mutex ) != 0 )
104 
105  return( 0 );
106 }
107 
108 int (*polarssl_mutex_init)( threading_mutex_t * ) = threading_mutex_init_pthread;
109 int (*polarssl_mutex_free)( threading_mutex_t * ) = threading_mutex_free_pthread;
110 int (*polarssl_mutex_lock)( threading_mutex_t * ) = threading_mutex_lock_pthread;
111 int (*polarssl_mutex_unlock)( threading_mutex_t * ) = threading_mutex_unlock_pthread;
112 #endif /* POLARSSL_THREADING_PTHREAD */
113 
114 #if defined(POLARSSL_THREADING_ALT)
115 int (*polarssl_mutex_init)( threading_mutex_t * ) = NULL;
116 int (*polarssl_mutex_free)( threading_mutex_t * ) = NULL;
117 int (*polarssl_mutex_lock)( threading_mutex_t * ) = NULL;
118 int (*polarssl_mutex_unlock)( threading_mutex_t * ) = NULL;
119 
120 int threading_set_alt( int (*mutex_init)( threading_mutex_t * ),
121  int (*mutex_free)( threading_mutex_t * ),
122  int (*mutex_lock)( threading_mutex_t * ),
123  int (*mutex_unlock)( threading_mutex_t * ) )
124 {
125  polarssl_mutex_init = mutex_init;
126  polarssl_mutex_free = mutex_free;
127  polarssl_mutex_lock = mutex_lock;
128  polarssl_mutex_unlock = mutex_unlock;
129 
130  return( 0 );
131 }
132 #endif /* POLARSSL_THREADING_ALT_C */
133 
134 #endif /* POLARSSL_THREADING_C */
int(* polarssl_mutex_lock)(threading_mutex_t *mutex)
Configuration options (set of defines)
Threading abstraction layer.
#define POLARSSL_ERR_THREADING_BAD_INPUT_DATA
Bad input parameters to function.
Definition: threading.h:39
int(* polarssl_mutex_free)(threading_mutex_t *mutex)
int(* polarssl_mutex_unlock)(threading_mutex_t *mutex)
int(* polarssl_mutex_init)(threading_mutex_t *mutex)
#define POLARSSL_ERR_THREADING_MUTEX_ERROR
Locking / unlocking / free failed with error code.
Definition: threading.h:40