blob: 5c70a46e0867818321b4fc0fab6a71f3d810fb1b (
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
|
// Copyright 2017 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 CONTENT_COMMON_POSSIBLY_ASSOCIATED_INTERFACE_PTR_H_
#define CONTENT_COMMON_POSSIBLY_ASSOCIATED_INTERFACE_PTR_H_
#include "base/macros.h"
#include "base/single_thread_task_runner.h"
#include "content/common/possibly_associated_interface_ptr_info.h"
#include "mojo/public/cpp/bindings/associated_interface_ptr.h"
#include "mojo/public/cpp/bindings/interface_ptr.h"
namespace content {
// PossiblyAssociatedInterfacePtr<T> contains mojo::InterfacePtr<T> or
// mojo::AssociatedInterfacePtr<T>, but not both. Mojo-related functions in
// mojo::InterfacePtr<T> and mojo::AssociatedInterfacePtr<T> are not accessible,
// but a user can access the raw pointer to the interface.
template <typename T>
class PossiblyAssociatedInterfacePtr final {
public:
using InterfaceType = T;
using PtrInfoType = PossiblyAssociatedInterfacePtrInfo<T>;
PossiblyAssociatedInterfacePtr() {}
PossiblyAssociatedInterfacePtr(std::nullptr_t) {}
PossiblyAssociatedInterfacePtr(mojo::InterfacePtr<T> independent_ptr)
: independent_ptr_(std::move(independent_ptr)) {}
PossiblyAssociatedInterfacePtr(mojo::AssociatedInterfacePtr<T> associated_ptr)
: associated_ptr_(std::move(associated_ptr)) {}
PossiblyAssociatedInterfacePtr(PossiblyAssociatedInterfacePtr&& other) =
default;
~PossiblyAssociatedInterfacePtr() {}
PossiblyAssociatedInterfacePtr& operator=(
PossiblyAssociatedInterfacePtr&& other) = default;
void Bind(PossiblyAssociatedInterfacePtrInfo<T> info,
scoped_refptr<base::SingleThreadTaskRunner> runner = nullptr) {
independent_ptr_.reset();
associated_ptr_.reset();
// A PossiblyAssociatedInterfacePtrInfo is guaranteed to only have either a
// valid InterfacePtrInfo or valid AssociatedInterfacePtrInfo, never both.
auto independent_ptr_info = info.TakeIndependentPtrInfo();
if (independent_ptr_info.is_valid())
independent_ptr_.Bind(std::move(independent_ptr_info), std::move(runner));
auto associated_ptr_info = info.TakeAssociatedPtrInfo();
if (associated_ptr_info.is_valid())
associated_ptr_.Bind(std::move(associated_ptr_info), std::move(runner));
}
PossiblyAssociatedInterfacePtrInfo<T> PassInterface() {
if (independent_ptr_)
return independent_ptr_.PassInterface();
if (associated_ptr_)
return associated_ptr_.PassInterface();
return nullptr;
}
T* get() const {
return independent_ptr_ ? independent_ptr_.get() : associated_ptr_.get();
}
T* operator->() const { return get(); }
T& operator*() const { return *get(); }
explicit operator bool() const { return get(); }
private:
mojo::InterfacePtr<T> independent_ptr_;
mojo::AssociatedInterfacePtr<T> associated_ptr_;
DISALLOW_COPY_AND_ASSIGN(PossiblyAssociatedInterfacePtr);
};
} // namespace content
#endif // CONTENT_COMMON_POSSIBLY_ASSOCIATED_INTERFACE_PTR_H_
|
