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
|
// $Id$
#include "ace/Synch.h"
#include "ace/Task.h"
#include "ace/Log_Msg.h"
#include "ace/Atomic_Op.h"
#if defined(RUNNING_ON_UNSAFE_MULTIPROCESSOR)
// Listing 1 code/ch14
typedef ACE_Atomic_Op<ACE_Thread_Mutex, unsigned int> SafeUInt;
// Listing 1
// Listing 2 code/ch14
typedef ACE_Atomic_Op<ACE_Thread_Mutex, int> SafeInt;
// Listing 2
#else
typedef ACE_Atomic_Op<ACE_Null_Mutex, unsigned int> SafeUInt;
typedef ACE_Atomic_Op<ACE_Null_Mutex, int> SafeInt;
#endif /* RUNNING_ON_UNSAFE_MULTIPROCESSOR) */
static const unsigned int Q_SIZE = 2;
static const int MAX_PROD = 10;
// Listing 3 code/ch14
class Producer : public ACE_Task_Base
{
public:
Producer (int *buf, SafeUInt &in, SafeUInt &out)
: buf_(buf), in_(in), out_(out)
{ }
int svc (void)
{
SafeInt itemNo = 0;
while (1)
{
// Busy wait.
do
{ }
while (in_.value () - out_.value () == Q_SIZE);
itemNo++;
buf_[in_.value () % Q_SIZE] = itemNo.value ();
in_++;
ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("Produced %d \n"),
itemNo.value ()));
if (check_termination (itemNo.value ()))
break;
}
return 0;
}
int check_termination (int item)
{
return (item == MAX_PROD);
}
private:
int * buf_;
SafeUInt& in_;
SafeUInt& out_;
};
class Consumer : public ACE_Task_Base
{
public:
Consumer (int *buf, SafeUInt &in, SafeUInt& out)
: buf_(buf), in_(in), out_(out)
{ }
int svc (void)
{
while (1)
{
int item;
// Busy wait.
do
{ }
while (in_.value () - out_.value () == 0);
item = buf_[out_.value () % Q_SIZE];
out_++;
ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("Consumed %d\n"),
item));
if (check_termination (item))
break;
}
return 0;
}
int check_termination (int item)
{
return (item == MAX_PROD);
}
private:
int * buf_;
SafeUInt& in_;
SafeUInt& out_;
};
// Listing 3
// Listing 4 code/ch14
int ACE_TMAIN (int, ACE_TCHAR *[])
{
int shared_buf[Q_SIZE];
SafeUInt in = 0;
SafeUInt out = 0;
Producer producer (shared_buf, in, out);
Consumer consumer (shared_buf, in, out);
producer.activate();
consumer.activate();
producer.wait();
consumer.wait();
return 0;
}
// Listing 4
#if defined (ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION)
template class ACE_Atomic_Op<ACE_Null_Mutex, unsigned int>;
template class ACE_Atomic_Op<ACE_Null_Mutex, int>;
template class ACE_Atomic_Op_Ex<ACE_Null_Mutex, unsigned int>;
template class ACE_Atomic_Op_Ex<ACE_Null_Mutex, int>;
#elif defined (ACE_HAS_TEMPLATE_INSTANTIATION_PRAGMA)
#pragma instantiate ACE_Atomic_Op<ACE_Null_Mutex, unsigned int>
#pragma instantiate ACE_Atomic_Op<ACE_Null_Mutex, int>
#pragma instantiate ACE_Atomic_Op_Ex<ACE_Null_Mutex, unsigned int>
#pragma instantiate ACE_Atomic_Op_Ex<ACE_Null_Mutex, int>
#endif /* ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION */
|
