1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "base/callback_internal.h"
6
7 #include "base/logging.h"
8
9 namespace base {
10 namespace internal {
11
12 namespace {
13
ReturnFalse(const BindStateBase *)14 bool ReturnFalse(const BindStateBase*) {
15 return false;
16 }
17
18 } // namespace
19
Destruct(const BindStateBase * bind_state)20 void BindStateBaseRefCountTraits::Destruct(const BindStateBase* bind_state) {
21 bind_state->destructor_(bind_state);
22 }
23
BindStateBase(InvokeFuncStorage polymorphic_invoke,void (* destructor)(const BindStateBase *))24 BindStateBase::BindStateBase(InvokeFuncStorage polymorphic_invoke,
25 void (*destructor)(const BindStateBase*))
26 : BindStateBase(polymorphic_invoke, destructor, &ReturnFalse) {
27 }
28
BindStateBase(InvokeFuncStorage polymorphic_invoke,void (* destructor)(const BindStateBase *),bool (* is_cancelled)(const BindStateBase *))29 BindStateBase::BindStateBase(InvokeFuncStorage polymorphic_invoke,
30 void (*destructor)(const BindStateBase*),
31 bool (*is_cancelled)(const BindStateBase*))
32 : polymorphic_invoke_(polymorphic_invoke),
33 destructor_(destructor),
34 is_cancelled_(is_cancelled) {}
35
36 CallbackBase& CallbackBase::operator=(CallbackBase&& c) noexcept = default;
CallbackBase(const CallbackBaseCopyable & c)37 CallbackBase::CallbackBase(const CallbackBaseCopyable& c)
38 : bind_state_(c.bind_state_) {}
39
operator =(const CallbackBaseCopyable & c)40 CallbackBase& CallbackBase::operator=(const CallbackBaseCopyable& c) {
41 bind_state_ = c.bind_state_;
42 return *this;
43 }
44
CallbackBase(CallbackBaseCopyable && c)45 CallbackBase::CallbackBase(CallbackBaseCopyable&& c) noexcept
46 : bind_state_(std::move(c.bind_state_)) {}
47
operator =(CallbackBaseCopyable && c)48 CallbackBase& CallbackBase::operator=(CallbackBaseCopyable&& c) noexcept {
49 bind_state_ = std::move(c.bind_state_);
50 return *this;
51 }
52
Reset()53 void CallbackBase::Reset() {
54 // NULL the bind_state_ last, since it may be holding the last ref to whatever
55 // object owns us, and we may be deleted after that.
56 bind_state_ = nullptr;
57 }
58
IsCancelled() const59 bool CallbackBase::IsCancelled() const {
60 DCHECK(bind_state_);
61 return bind_state_->IsCancelled();
62 }
63
EqualsInternal(const CallbackBase & other) const64 bool CallbackBase::EqualsInternal(const CallbackBase& other) const {
65 return bind_state_ == other.bind_state_;
66 }
67
68 CallbackBase::~CallbackBase() = default;
69
CallbackBaseCopyable(const CallbackBaseCopyable & c)70 CallbackBaseCopyable::CallbackBaseCopyable(const CallbackBaseCopyable& c) {
71 bind_state_ = c.bind_state_;
72 }
73
operator =(const CallbackBaseCopyable & c)74 CallbackBaseCopyable& CallbackBaseCopyable::operator=(
75 const CallbackBaseCopyable& c) {
76 bind_state_ = c.bind_state_;
77 return *this;
78 }
79
80 CallbackBaseCopyable& CallbackBaseCopyable::operator=(
81 CallbackBaseCopyable&& c) noexcept = default;
82
83 } // namespace internal
84 } // namespace base
85