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
|
// Boost.Signals library
// Copyright Douglas Gregor 2001-2004. Use, modification and
// distribution is subject to the Boost Software License, Version
// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// For more information, see http://www.boost.org
#ifndef BOOST_SIGNALS_SIGNAL_BASE_HEADER
#define BOOST_SIGNALS_SIGNAL_BASE_HEADER
#include <boost/signals/detail/config.hpp>
#include <boost/signals/detail/signals_common.hpp>
#include <boost/signals/detail/named_slot_map.hpp>
#include <boost/signals/connection.hpp>
#include <boost/signals/trackable.hpp>
#include <boost/signals/slot.hpp>
#include <boost/smart_ptr.hpp>
#include <boost/utility.hpp>
#include <boost/function/function2.hpp>
#include <utility>
#include <vector>
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_PREFIX
#endif
namespace boost {
namespace BOOST_SIGNALS_NAMESPACE {
namespace detail {
// Must be constructed before calling the slots, because it safely
// manages call depth
class BOOST_SIGNALS_DECL call_notification {
public:
call_notification(const shared_ptr<signal_base_impl>&);
~call_notification();
shared_ptr<signal_base_impl> impl;
};
// Implementation of base class for all signals. It handles the
// management of the underlying slot lists.
class BOOST_SIGNALS_DECL signal_base_impl {
public:
friend class call_notification;
typedef function2<bool, stored_group, stored_group> compare_type;
// Make sure that an exception does not cause the "clearing" flag to
// remain set
class temporarily_set_clearing {
public:
temporarily_set_clearing(signal_base_impl* b) : base(b)
{
base->flags.clearing = true;
}
~temporarily_set_clearing()
{
base->flags.clearing = false;
}
private:
signal_base_impl* base;
};
friend class temporarily_set_clearing;
signal_base_impl(const compare_type&, const any&);
~signal_base_impl();
// Disconnect all slots connected to this signal
void disconnect_all_slots();
// Are there any connected slots?
bool empty() const;
// The number of connected slots
std::size_t num_slots() const;
// Disconnect all slots in the given group
void disconnect(const stored_group&);
// We're being notified that a slot has disconnected
static void slot_disconnected(void* obj, void* data);
connection connect_slot(const any& slot,
const stored_group& name,
shared_ptr<slot_base::data_t> data,
connect_position at);
private:
// Remove all of the slots that have been marked "disconnected"
void remove_disconnected_slots() const;
public:
// Our call depth when invoking slots (> 1 when we have a loop)
mutable int call_depth;
struct {
// True if some slots have disconnected, but we were not able to
// remove them from the list of slots because there are valid
// iterators into the slot list
mutable bool delayed_disconnect:1;
// True if we are disconnecting all disconnected slots
bool clearing:1;
} flags;
// Slots
mutable named_slot_map slots_;
any combiner_;
// Types
typedef named_slot_map::iterator iterator;
};
class BOOST_SIGNALS_DECL signal_base : public noncopyable {
public:
typedef signal_base_impl::compare_type compare_type;
friend class call_notification;
signal_base(const compare_type& comp, const any& combiner);
~signal_base();
public:
// Disconnect all slots connected to this signal
void disconnect_all_slots() { impl->disconnect_all_slots(); }
// Are there any connected slots?
bool empty() const { return impl->empty(); }
// How many slots are connected?
std::size_t num_slots() const { return impl->num_slots(); }
protected:
connection connect_slot(const any& slot,
const stored_group& name,
shared_ptr<slot_base::data_t> data,
connect_position at)
{
return impl->connect_slot(slot, name, data, at);
}
typedef named_slot_map::iterator iterator;
shared_ptr<signal_base_impl> impl;
};
} // end namespace detail
} // end namespace BOOST_SIGNALS_NAMESPACE
} // end namespace boost
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_SUFFIX
#endif
#endif // BOOST_SIGNALS_SIGNAL_BASE_HEADER
|
Swift