blob: 46f668814bfc15a7b26ca0c3c6dc41e2cd3f1c8a (
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
|
// -*- C++ -*-
//=============================================================================
/**
* @file Bit_Vector.h
*
* $Id$
*
* This is a basic bit vector class.
*
* @author Jonathan Pollack <pollack_j@ociweb.com>
*/
//=============================================================================
#ifndef BIT_VECTOR_H
#define BIT_VECTOR_H
#include /**/ "ace/pre.h"
#include "orbsvcs/Notify/notify_serv_export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
#pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "tao/Versioned_Namespace.h"
#include "ace/Vector_T.h"
#include "ace/Basic_Types.h"
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
namespace TAO_Notify
{
/// \brief Simple bit vector.
///
/// Written to support block allocation from persistent storage.
/// Should be promoted to the ACE level to make it generally usable.
class TAO_Notify_Serv_Export Bit_Vector
{
typedef ACE_UINT32 BASIC_UINT_TYPE;
typedef ACE_Vector<BASIC_UINT_TYPE> VECTOR_TYPE;
enum {
BITS_PER_WORD = 32,
BPW_LOG_2 = 5
};
public:
/// The constructor.
Bit_Vector();
/// The destructor.
~Bit_Vector();
/// \brief Determine if a bit at location is set.
bool is_set(const size_t location) const;
/// \brief Set or unset a bit at location, growing the vector as needed.
void set_bit(const size_t location, bool set);
/// \brief Find the first bit that is either set or unset in an O(1).
size_t find_first_bit(bool set) const;
private:
/// Update our first set and unset bits.
void evaluate_firsts(const size_t location, bool set);
/// Iterate from location to the end, finding the first bit that
/// matches the requested set or unset value.
size_t find_first_bit_of(const size_t location, bool set);
private:
VECTOR_TYPE bitvec_;
size_t size_;
size_t first_set_bit_;
size_t first_cleared_bit_;
};
}
TAO_END_VERSIONED_NAMESPACE_DECL
#include /**/ "ace/post.h"
#endif /* BIT_VECTOR_H */
|
