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// Copyright (c) 2012 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.
#include "base/callback_internal.h"
#include "base/logging.h"
namespace base {
namespace internal {
namespace {
bool ReturnFalse(const BindStateBase*) {
return false;
}
} // namespace
BindStateBase::BindStateBase(InvokeFuncStorage polymorphic_invoke,
void (*destructor)(const BindStateBase*))
: BindStateBase(polymorphic_invoke, destructor, &ReturnFalse) {
}
BindStateBase::BindStateBase(InvokeFuncStorage polymorphic_invoke,
void (*destructor)(const BindStateBase*),
bool (*is_cancelled)(const BindStateBase*))
: polymorphic_invoke_(polymorphic_invoke),
ref_count_(0),
destructor_(destructor),
is_cancelled_(is_cancelled) {}
void BindStateBase::AddRef() const {
AtomicRefCountInc(&ref_count_);
}
void BindStateBase::Release() const {
if (!AtomicRefCountDec(&ref_count_))
destructor_(this);
}
CallbackBase<CopyMode::MoveOnly>::CallbackBase(CallbackBase&& c) = default;
CallbackBase<CopyMode::MoveOnly>&
CallbackBase<CopyMode::MoveOnly>::operator=(CallbackBase&& c) = default;
CallbackBase<CopyMode::MoveOnly>::CallbackBase(
const CallbackBase<CopyMode::Copyable>& c)
: bind_state_(c.bind_state_) {}
CallbackBase<CopyMode::MoveOnly>& CallbackBase<CopyMode::MoveOnly>::operator=(
const CallbackBase<CopyMode::Copyable>& c) {
bind_state_ = c.bind_state_;
return *this;
}
void CallbackBase<CopyMode::MoveOnly>::Reset() {
// NULL the bind_state_ last, since it may be holding the last ref to whatever
// object owns us, and we may be deleted after that.
bind_state_ = nullptr;
}
bool CallbackBase<CopyMode::MoveOnly>::IsCancelled() const {
DCHECK(bind_state_);
return bind_state_->IsCancelled();
}
bool CallbackBase<CopyMode::MoveOnly>::EqualsInternal(
const CallbackBase& other) const {
return bind_state_ == other.bind_state_;
}
CallbackBase<CopyMode::MoveOnly>::CallbackBase(
BindStateBase* bind_state)
: bind_state_(bind_state) {
DCHECK(!bind_state_.get() || bind_state_->ref_count_ == 1);
}
CallbackBase<CopyMode::MoveOnly>::~CallbackBase() {}
CallbackBase<CopyMode::Copyable>::CallbackBase(
const CallbackBase& c)
: CallbackBase<CopyMode::MoveOnly>(nullptr) {
bind_state_ = c.bind_state_;
}
CallbackBase<CopyMode::Copyable>::CallbackBase(CallbackBase&& c) = default;
CallbackBase<CopyMode::Copyable>&
CallbackBase<CopyMode::Copyable>::operator=(const CallbackBase& c) {
bind_state_ = c.bind_state_;
return *this;
}
CallbackBase<CopyMode::Copyable>&
CallbackBase<CopyMode::Copyable>::operator=(CallbackBase&& c) = default;
template class CallbackBase<CopyMode::MoveOnly>;
template class CallbackBase<CopyMode::Copyable>;
} // namespace internal
} // namespace base
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