blob: f2c948029a5bd3510f2a1d105f91ef179f019720 (
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
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MOJO_PUBLIC_CPP_BINDINGS_BINDING_SET_H_
#define MOJO_PUBLIC_CPP_BINDINGS_BINDING_SET_H_
#include <algorithm>
#include <utility>
#include <vector>
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "mojo/public/cpp/bindings/binding.h"
namespace mojo {
// Use this class to manage a set of bindings, which are automatically destroyed
// and removed from the set when the pipe they are bound to is disconnected.
template <typename Interface>
class BindingSet {
public:
BindingSet() {}
~BindingSet() { CloseAllBindings(); }
void set_connection_error_handler(const Closure& error_handler) {
error_handler_ = error_handler;
}
void AddBinding(Interface* impl, InterfaceRequest<Interface> request) {
auto binding = new Element(impl, std::move(request));
binding->set_connection_error_handler([this]() { OnConnectionError(); });
bindings_.push_back(binding->GetWeakPtr());
}
// Returns an InterfacePtr bound to one end of a pipe whose other end is
// bound to |this|.
InterfacePtr<Interface> CreateInterfacePtrAndBind(Interface* impl) {
InterfacePtr<Interface> interface_ptr;
AddBinding(impl, GetProxy(&interface_ptr));
return interface_ptr;
}
void CloseAllBindings() {
for (const auto& it : bindings_) {
if (it) {
it->Close();
delete it.get();
}
}
bindings_.clear();
}
bool empty() const { return bindings_.empty(); }
private:
class Element {
public:
Element(Interface* impl, InterfaceRequest<Interface> request)
: binding_(impl, std::move(request)), weak_ptr_factory_(this) {
binding_.set_connection_error_handler([this]() { OnConnectionError(); });
}
~Element() {}
void set_connection_error_handler(const Closure& error_handler) {
error_handler_ = error_handler;
}
base::WeakPtr<Element> GetWeakPtr() {
return weak_ptr_factory_.GetWeakPtr();
}
void Close() { binding_.Close(); }
void OnConnectionError() {
Closure error_handler = error_handler_;
delete this;
error_handler.Run();
}
private:
Binding<Interface> binding_;
Closure error_handler_;
base::WeakPtrFactory<Element> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(Element);
};
void OnConnectionError() {
// Clear any deleted bindings.
bindings_.erase(std::remove_if(bindings_.begin(), bindings_.end(),
[](const base::WeakPtr<Element>& p) {
return p.get() == nullptr;
}),
bindings_.end());
error_handler_.Run();
}
Closure error_handler_;
std::vector<base::WeakPtr<Element>> bindings_;
DISALLOW_COPY_AND_ASSIGN(BindingSet);
};
} // namespace mojo
#endif // MOJO_PUBLIC_CPP_BINDINGS_BINDING_SET_H_
|
