blob: 21741ca7bda3e85c4a8514c04f284637c7798ccc (
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
|
/* -*- C++ -*- */
// ============================================================================
// $Id$
//
// = LIBRARY
// orsvcs
//
// = FILENAME
// Monitor.h
//
// = AUTHOR
// Irfan Pyarali <irfan@cs.wustl.edu>
//
// ============================================================================
#ifndef TAO_MONITOR_H
#define TAO_MONITOR_H
template <class TYPE, class TAO_LOCK>
class TAO_Monitor : public TYPE
{
//
// = TITLE
//
// A utility class for writing applications where access to an
// object must be synchronized in a multithreaded environment.
//
//
// = DESCRIPTION
//
// A monitor associates a lock of type TAO_LOCK with an object
// of type TYPE. The user is fully responsible for invoking all
// necessary acquire/release operations on that lock (i.e. the
// monitor does not automate any lock operations - all
// operations are invoked explicitly by the user). The
// usefullness of a monitor is in associating one lock with one
// object without the need for inheritance or much code.
//
//
public:
typedef TAO_LOCK LOCK_TYPE;
TAO_Monitor (void)
: delete_ (1)
{
ACE_NEW (this->lock_, TAO_LOCK);
}
TAO_Monitor (const TAO_Monitor& monitor)
{
// Assume control of their lock.
TAO_Monitor* mon = (TAO_Monitor*)&monitor;
mon->delete_ = 0;
this->delete_ = 1;
this->lock_ = mon->lock_;
}
~TAO_Monitor (void)
{
if (this->delete_)
delete this->lock_;
}
// Return a reference to the lock that I use.
TAO_LOCK &lock (void)
{
return *this->lock_;
}
// Return a reference to the lock that I use.
const TAO_LOCK &lock (void) const
{
return *this->lock_;
}
protected:
int delete_;
TAO_LOCK* lock_;
// Lock used to monitor the object.
};
#endif /* #define TAO_MONITOR_H */
|
