blob: ee0c330bf4ad20c48fa8e2c0acdb4d95fd799497 (
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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/* -*- C++ -*- */
//=============================================================================
/**
* @file Atomic_Op.h
*
* $Id$
*
* @author Douglas C. Schmidt <schmidt@uci.edu>
*/
//=============================================================================
#ifndef ACE_ATOMIC_OP_H
#define ACE_ATOMIC_OP_H
#include /**/ "ace/pre.h"
#include "ace/config-all.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/Thread_Mutex.h"
// Include the templates here.
#include "ace/Atomic_Op_T.h"
// Determine whether builtin atomic op support is
// available on this platform.
#if defined (ACE_HAS_THREADS)
# if defined (WIN32)
# if defined (ACE_HAS_INTERLOCKED_EXCHANGEADD)
# define ACE_HAS_BUILTIN_ATOMIC_OP
# else /* ACE_HAS_INTERLOCKED_EXCHANGEADD */
// Inline assembly emulation of InterlockedExchangeAdd
// is currently only implemented for MSVC (x86 only) and Borland.
# if (defined (_MSC_VER) && defined (_M_IX86)) || defined (__BORLANDC__)
# define ACE_HAS_BUILTIN_ATOMIC_OP
# endif /* _MSC_VER || __BORLANDC__ */
# endif /* ACE_HAS_INTERLOCKED_EXCHANGEADD */
# elif defined (__GNUC__) && defined (ACE_HAS_PENTIUM)
# define ACE_HAS_BUILTIN_ATOMIC_OP
# endif /* WIN32 */
#endif /* ACE_HAS_THREADS */
#if defined (ACE_HAS_BUILTIN_ATOMIC_OP)
ACE_TEMPLATE_SPECIALIZATION
/**
* @class ACE_Atomic_Op<ACE_Thread_Mutex, long>
*
* @brief Specialization of ACE_Atomic_Op for platforms that
* support atomic integer operations.
*
* Specialization of ACE_Atomic_Op for platforms that support atomic
* integer operations.
*/
class ACE_Export ACE_Atomic_Op<ACE_Thread_Mutex, long>
{
public:
/// Initialize <value_> to 0.
ACE_Atomic_Op (void);
/// Initialize <value_> to c.
ACE_Atomic_Op (long c);
/// Manage copying...
ACE_Atomic_Op (const ACE_Atomic_Op<ACE_Thread_Mutex, long> &c);
/// Atomically pre-increment <value_>.
long operator++ (void);
/// Atomically post-increment <value_>.
long operator++ (int);
/// Atomically increment <value_> by rhs.
long operator+= (long rhs);
/// Atomically pre-decrement <value_>.
long operator-- (void);
/// Atomically post-decrement <value_>.
long operator-- (int);
/// Atomically decrement <value_> by rhs.
long operator-= (long rhs);
/// Atomically compare <value_> with rhs.
bool operator== (long rhs) const;
/// Atomically compare <value_> with rhs.
bool operator!= (long rhs) const;
/// Atomically check if <value_> greater than or equal to rhs.
bool operator>= (long rhs) const;
/// Atomically check if <value_> greater than rhs.
bool operator> (long rhs) const;
/// Atomically check if <value_> less than or equal to rhs.
bool operator<= (long rhs) const;
/// Atomically check if <value_> less than rhs.
bool operator< (long rhs) const;
/// Atomically assign rhs to <value_>.
void operator= (long rhs);
/// Atomically assign <rhs> to <value_>.
void operator= (const ACE_Atomic_Op<ACE_Thread_Mutex, long> &rhs);
/// Explicitly return <value_>.
long value (void) const;
/// Dump the state of an object.
void dump (void) const;
/// Explicitly return <value_> (by reference).
volatile long &value_i (void);
// ACE_ALLOC_HOOK_DECLARE;
// Declare the dynamic allocation hooks.
/// Used during ACE object manager initialization to optimize the fast
/// atomic op implementation according to the number of CPUs.
static void init_functions (void);
private:
// This function cannot be supported by this template specialization.
// If you need access to an underlying lock, use the ACE_Atomic_Op_Ex
// template instead.
ACE_UNIMPLEMENTED_FUNC (ACE_Thread_Mutex &mutex (void))
/// Current object decorated by the atomic op.
volatile long value_;
// Single-cpu atomic op implementations.
static long single_cpu_increment (volatile long *value);
static long single_cpu_decrement (volatile long *value);
static long single_cpu_exchange (volatile long *value, long rhs);
static long single_cpu_exchange_add (volatile long *value, long rhs);
// Multi-cpu atomic op implementations.
static long multi_cpu_increment (volatile long *value);
static long multi_cpu_decrement (volatile long *value);
static long multi_cpu_exchange (volatile long *value, long rhs);
static long multi_cpu_exchange_add (volatile long *value, long rhs);
// Pointers to selected atomic op implementations.
static long (*increment_fn_) (volatile long *);
static long (*decrement_fn_) (volatile long *);
static long (*exchange_fn_) (volatile long *, long);
static long (*exchange_add_fn_) (volatile long *, long);
};
#endif /* ACE_HAS_BUILTIN_ATOMIC_OP */
#if defined (__ACE_INLINE__)
#include "ace/Atomic_Op.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /*ACE_ATOMIC_OP_H*/
|
