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
168
169
|
//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $NoKeywords: $
//
//=============================================================================//
/*
*
* Copyright (c) 1998-9
* Dr John Maddock
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Dr John Maddock makes no representations
* about the suitability of this software for any purpose.
* It is provided "as is" without express or implied warranty.
*
*/
/*
* FILE re_thrd.h
* VERSION 2.12
* Thread synch helper functions, for regular
* expression library.
*/
#ifndef RE_THRD_H
#define RE_THRD_H
#ifndef JM_CFG_H
#include <jm/jm_cfg.h>
#endif
#if defined(JM_PLATFORM_W32) && defined(JM_THREADS)
//#include <windows.h>
#endif
#if !defined(JM_PLATFORM_W32) && defined(JM_THREADS)
#include <pthread.h>
#endif
JM_NAMESPACE(__JM)
void RE_CALL re_init_threads();
void RE_CALL re_free_threads();
#ifdef JM_THREADS
#ifndef JM_PLATFORM_W32
typedef pthread_mutex_t CRITICAL_SECTION;
inline void RE_CALL InitializeCriticalSection(CRITICAL_SECTION* ps)
{
pthread_mutex_init(ps, NULL);
}
inline void RE_CALL DeleteCriticalSection(CRITICAL_SECTION* ps)
{
pthread_mutex_destroy(ps);
}
inline void RE_CALL EnterCriticalSection(CRITICAL_SECTION* ps)
{
pthread_mutex_lock(ps);
}
inline void RE_CALL LeaveCriticalSection(CRITICAL_SECTION* ps)
{
pthread_mutex_unlock(ps);
}
#endif
template <class Lock>
class lock_guard
{
typedef Lock lock_type;
public:
lock_guard(lock_type& m, bool aq = true)
: mut(m), owned(false){ acquire(aq); }
~lock_guard()
{ acquire(false); }
void RE_CALL acquire(bool aq = true, DWORD timeout = INFINITE)
{
if(aq && !owned)
{
mut.acquire(true, timeout);
owned = true;
}
else if(!aq && owned)
{
mut.acquire(false);
owned = false;
}
}
private:
lock_type& mut;
bool owned;
};
class critical_section
{
public:
critical_section()
{ InitializeCriticalSection(&hmutex);}
critical_section(const critical_section&)
{ InitializeCriticalSection(&hmutex);}
const critical_section& RE_CALL operator=(const critical_section&)
{return *this;}
~critical_section()
{DeleteCriticalSection(&hmutex);}
private:
void RE_CALL acquire(bool aq, DWORD unused = INFINITE)
{ if(aq) EnterCriticalSection(&hmutex);
else LeaveCriticalSection(&hmutex);
}
CRITICAL_SECTION hmutex;
public:
typedef lock_guard<critical_section> ro_guard;
typedef lock_guard<critical_section> rw_guard;
friend lock_guard<critical_section>;
};
inline bool RE_CALL operator==(const critical_section&, const critical_section&)
{
return false;
}
inline bool RE_CALL operator<(const critical_section&, const critical_section&)
{
return true;
}
typedef lock_guard<critical_section> cs_guard;
JM_IX_DECL extern critical_section* p_re_lock;
JM_IX_DECL extern unsigned int re_lock_count;
#define JM_GUARD(inst) __JM::critical_section::rw_guard g(inst);
#else // JM_THREADS
#define JM_GUARD(inst)
#endif // JM_THREADS
JM_END_NAMESPACE
#endif // sentry
|