summaryrefslogtreecommitdiff
path: root/cutils/threads.h
blob: acf8f4843d92fc7a3a82c7601781361061a21ffa (plain)
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
/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef _LIBS_CUTILS_THREADS_H
#define _LIBS_CUTILS_THREADS_H

#ifdef __cplusplus
extern "C" {
#endif

/***********************************************************************/
/***********************************************************************/
/*****                                                             *****/
/*****         local thread storage                                *****/
/*****                                                             *****/
/***********************************************************************/
/***********************************************************************/

#ifdef HAVE_PTHREADS

#include  <pthread.h>

typedef struct {
    pthread_mutex_t   lock;
    int               has_tls;
    pthread_key_t     tls;

} thread_store_t;

#define  THREAD_STORE_INITIALIZER  { PTHREAD_MUTEX_INITIALIZER, 0, 0 }

#elif defined HAVE_WIN32_THREADS

#include <windows.h>

typedef struct {
    int               lock_init;
    int               has_tls;
    DWORD             tls;
    CRITICAL_SECTION  lock;

} thread_store_t;

#define  THREAD_STORE_INITIALIZER  { 0, 0, 0, {0, 0, 0, 0, 0, 0} }

#else
#  error  "no thread_store_t implementation for your platform !!"
#endif

typedef void  (*thread_store_destruct_t)(void*  value);

extern void*  thread_store_get(thread_store_t*  store);

extern void   thread_store_set(thread_store_t*          store, 
                               void*                    value,
                               thread_store_destruct_t  destroy);

/***********************************************************************/
/***********************************************************************/
/*****                                                             *****/
/*****         mutexes                                             *****/
/*****                                                             *****/
/***********************************************************************/
/***********************************************************************/

#ifdef HAVE_PTHREADS

typedef pthread_mutex_t   mutex_t;

#define  MUTEX_INITIALIZER  PTHREAD_MUTEX_INITIALIZER

static __inline__ void  mutex_lock(mutex_t*  lock)
{
    pthread_mutex_lock(lock);
}
static __inline__ void  mutex_unlock(mutex_t*  lock)
{
    pthread_mutex_unlock(lock);
}
static __inline__ int  mutex_init(mutex_t*  lock)
{
    return pthread_mutex_init(lock, NULL);
}
static __inline__ void mutex_destroy(mutex_t*  lock)
{
    pthread_mutex_destroy(lock);
}
#endif

#ifdef HAVE_WIN32_THREADS
typedef struct { 
    int                init;
    CRITICAL_SECTION   lock[1];
} mutex_t;

#define  MUTEX_INITIALIZER  { 0, {{ NULL, 0, 0, NULL, NULL, 0 }} }

static __inline__ void  mutex_lock(mutex_t*  lock)
{
    if (!lock->init) {
        lock->init = 1;
        InitializeCriticalSection( lock->lock );
        lock->init = 2;
    } else while (lock->init != 2)
        Sleep(10);

    EnterCriticalSection(lock->lock);
}

static __inline__ void  mutex_unlock(mutex_t*  lock)
{
    LeaveCriticalSection(lock->lock);
}
static __inline__ int  mutex_init(mutex_t*  lock)
{
    InitializeCriticalSection(lock->lock);
    lock->init = 2;
    return 0;
}
static __inline__ void  mutex_destroy(mutex_t*  lock)
{
    if (lock->init) {
        lock->init = 0;
        DeleteCriticalSection(lock->lock); 
    }
}
#endif

#ifdef __cplusplus
}
#endif

#endif /* _LIBS_CUTILS_THREADS_H */