source: vendor/current/lib/util/smb_threads.h

Last change on this file was 414, checked in by Herwig Bauernfeind, 15 years ago

Samba 3.5.0: Initial import

File size: 3.7 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 SMB thread interface functions.
4 Copyright (C) Jeremy Allison, 2009.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
18*/
19
20#ifndef _smb_threads_h_
21#define _smb_threads_h_
22
23typedef bool smb_thread_once_t;
24#define SMB_THREAD_ONCE_INIT false
25
26enum smb_thread_lock_type {
27 SMB_THREAD_LOCK = 1,
28 SMB_THREAD_UNLOCK
29};
30
31struct smb_thread_functions {
32 /* Mutex and tls functions. */
33 int (*create_mutex)(const char *lockname,
34 void **pplock,
35 const char *location);
36 void (*destroy_mutex)(void *plock,
37 const char *location);
38 int (*lock_mutex)(void *plock,
39 int lock_type,
40 const char *location);
41
42 /* Thread local storage. */
43 int (*create_tls)(const char *keyname,
44 void **ppkey,
45 const char *location);
46 void (*destroy_tls)(void **pkey,
47 const char *location);
48 int (*set_tls)(void *pkey, const void *pval, const char *location);
49 void *(*get_tls)(void *pkey, const char *location);
50};
51
52int smb_thread_set_functions(const struct smb_thread_functions *tf);
53int smb_thread_once(smb_thread_once_t *ponce,
54 void (*init_fn)(void *pdata),
55 void *pdata);
56
57extern const struct smb_thread_functions *global_tfp;
58
59/* Define the pthread version of the functions. */
60
61#define SMB_THREADS_DEF_PTHREAD_IMPLEMENTATION(tf) \
62 \
63static int smb_create_mutex_pthread(const char *lockname, void **pplock, const char *location) \
64{ \
65 pthread_mutex_t *pmut = (pthread_mutex_t *)malloc(sizeof(pthread_mutex_t)); \
66 if (!pmut) { \
67 return ENOMEM; \
68 } \
69 pthread_mutex_init(pmut, NULL); \
70 *pplock = (void *)pmut; \
71 return 0; \
72} \
73 \
74static void smb_destroy_mutex_pthread(void *plock, const char *location) \
75{ \
76 pthread_mutex_destroy((pthread_mutex_t *)plock); \
77 free(plock); \
78} \
79 \
80static int smb_lock_pthread(void *plock, int lock_type, const char *location) \
81{ \
82 if (lock_type == SMB_THREAD_UNLOCK) { \
83 return pthread_mutex_unlock((pthread_mutex_t *)plock); \
84 } else { \
85 return pthread_mutex_lock((pthread_mutex_t *)plock); \
86 } \
87} \
88 \
89static int smb_create_tls_pthread(const char *keyname, void **ppkey, const char *location) \
90{ \
91 int ret; \
92 pthread_key_t *pkey; \
93 pkey = (pthread_key_t *)malloc(sizeof(pthread_key_t)); \
94 if (!pkey) { \
95 return ENOMEM; \
96 } \
97 ret = pthread_key_create(pkey, NULL); \
98 if (ret) { \
99 free(pkey); \
100 return ret; \
101 } \
102 *ppkey = (void *)pkey; \
103 return 0; \
104} \
105 \
106static void smb_destroy_tls_pthread(void **ppkey, const char *location) \
107{ \
108 if (*ppkey) { \
109 pthread_key_delete(*(pthread_key_t *)ppkey); \
110 free(*ppkey); \
111 *ppkey = NULL; \
112 } \
113} \
114 \
115static int smb_set_tls_pthread(void *pkey, const void *pval, const char *location) \
116{ \
117 return pthread_setspecific(*(pthread_key_t *)pkey, pval); \
118} \
119 \
120static void *smb_get_tls_pthread(void *pkey, const char *location) \
121{ \
122 return pthread_getspecific(*(pthread_key_t *)pkey); \
123} \
124 \
125static const struct smb_thread_functions (tf) = { \
126 smb_create_mutex_pthread, \
127 smb_destroy_mutex_pthread, \
128 smb_lock_pthread, \
129 smb_create_tls_pthread, \
130 smb_destroy_tls_pthread, \
131 smb_set_tls_pthread, \
132 smb_get_tls_pthread }
133
134#endif
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