Repo created

TMessagesProj/jni/voip/webrtc/base/callback_internal.cc

@@ -0,0 +1,100 @@
+// 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 QueryCancellationTraitsForNonCancellables(
+    const BindStateBase*,
+    BindStateBase::CancellationQueryMode mode) {
+  switch (mode) {
+    case BindStateBase::IS_CANCELLED:
+      return false;
+    case BindStateBase::MAYBE_VALID:
+      return true;
+  }
+  NOTREACHED();
+}
+
+}  // namespace
+
+void BindStateBaseRefCountTraits::Destruct(const BindStateBase* bind_state) {
+  bind_state->destructor_(bind_state);
+}
+
+BindStateBase::BindStateBase(InvokeFuncStorage polymorphic_invoke,
+                             void (*destructor)(const BindStateBase*))
+    : BindStateBase(polymorphic_invoke,
+                    destructor,
+                    &QueryCancellationTraitsForNonCancellables) {}
+
+BindStateBase::BindStateBase(
+    InvokeFuncStorage polymorphic_invoke,
+    void (*destructor)(const BindStateBase*),
+    bool (*query_cancellation_traits)(const BindStateBase*,
+                                      CancellationQueryMode))
+    : polymorphic_invoke_(polymorphic_invoke),
+      destructor_(destructor),
+      query_cancellation_traits_(query_cancellation_traits) {}
+
+CallbackBase& CallbackBase::operator=(CallbackBase&& c) noexcept = default;
+CallbackBase::CallbackBase(const CallbackBaseCopyable& c)
+    : bind_state_(c.bind_state_) {}
+
+CallbackBase& CallbackBase::operator=(const CallbackBaseCopyable& c) {
+  bind_state_ = c.bind_state_;
+  return *this;
+}
+
+CallbackBase::CallbackBase(CallbackBaseCopyable&& c) noexcept
+    : bind_state_(std::move(c.bind_state_)) {}
+
+CallbackBase& CallbackBase::operator=(CallbackBaseCopyable&& c) noexcept {
+  bind_state_ = std::move(c.bind_state_);
+  return *this;
+}
+
+void CallbackBase::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::IsCancelled() const {
+  DCHECK(bind_state_);
+  return bind_state_->IsCancelled();
+}
+
+bool CallbackBase::MaybeValid() const {
+  DCHECK(bind_state_);
+  return bind_state_->MaybeValid();
+}
+
+bool CallbackBase::EqualsInternal(const CallbackBase& other) const {
+  return bind_state_ == other.bind_state_;
+}
+
+CallbackBase::~CallbackBase() = default;
+
+CallbackBaseCopyable::CallbackBaseCopyable(const CallbackBaseCopyable& c) {
+  bind_state_ = c.bind_state_;
+}
+
+CallbackBaseCopyable& CallbackBaseCopyable::operator=(
+    const CallbackBaseCopyable& c) {
+  bind_state_ = c.bind_state_;
+  return *this;
+}
+
+CallbackBaseCopyable& CallbackBaseCopyable::operator=(
+    CallbackBaseCopyable&& c) noexcept = default;
+
+}  // namespace internal
+}  // namespace base