101 lines
2.8 KiB
C++
101 lines
2.8 KiB
C++
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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/callback_internal.h"
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#include "base/logging.h"
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namespace base {
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namespace internal {
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namespace {
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bool QueryCancellationTraitsForNonCancellables(
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const BindStateBase*,
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BindStateBase::CancellationQueryMode mode) {
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switch (mode) {
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case BindStateBase::IS_CANCELLED:
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return false;
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case BindStateBase::MAYBE_VALID:
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return true;
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}
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NOTREACHED();
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}
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} // namespace
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void BindStateBaseRefCountTraits::Destruct(const BindStateBase* bind_state) {
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bind_state->destructor_(bind_state);
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}
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BindStateBase::BindStateBase(InvokeFuncStorage polymorphic_invoke,
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void (*destructor)(const BindStateBase*))
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: BindStateBase(polymorphic_invoke,
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destructor,
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&QueryCancellationTraitsForNonCancellables) {}
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BindStateBase::BindStateBase(
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InvokeFuncStorage polymorphic_invoke,
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void (*destructor)(const BindStateBase*),
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bool (*query_cancellation_traits)(const BindStateBase*,
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CancellationQueryMode))
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: polymorphic_invoke_(polymorphic_invoke),
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destructor_(destructor),
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query_cancellation_traits_(query_cancellation_traits) {}
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CallbackBase& CallbackBase::operator=(CallbackBase&& c) noexcept = default;
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CallbackBase::CallbackBase(const CallbackBaseCopyable& c)
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: bind_state_(c.bind_state_) {}
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CallbackBase& CallbackBase::operator=(const CallbackBaseCopyable& c) {
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bind_state_ = c.bind_state_;
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return *this;
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}
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CallbackBase::CallbackBase(CallbackBaseCopyable&& c) noexcept
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: bind_state_(std::move(c.bind_state_)) {}
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CallbackBase& CallbackBase::operator=(CallbackBaseCopyable&& c) noexcept {
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bind_state_ = std::move(c.bind_state_);
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return *this;
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}
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void CallbackBase::Reset() {
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// NULL the bind_state_ last, since it may be holding the last ref to whatever
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// object owns us, and we may be deleted after that.
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bind_state_ = nullptr;
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}
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bool CallbackBase::IsCancelled() const {
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DCHECK(bind_state_);
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return bind_state_->IsCancelled();
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}
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bool CallbackBase::MaybeValid() const {
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DCHECK(bind_state_);
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return bind_state_->MaybeValid();
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}
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bool CallbackBase::EqualsInternal(const CallbackBase& other) const {
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return bind_state_ == other.bind_state_;
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}
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CallbackBase::~CallbackBase() = default;
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CallbackBaseCopyable::CallbackBaseCopyable(const CallbackBaseCopyable& c) {
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bind_state_ = c.bind_state_;
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}
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CallbackBaseCopyable& CallbackBaseCopyable::operator=(
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const CallbackBaseCopyable& c) {
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bind_state_ = c.bind_state_;
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return *this;
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}
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CallbackBaseCopyable& CallbackBaseCopyable::operator=(
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CallbackBaseCopyable&& c) noexcept = default;
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} // namespace internal
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} // namespace base
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