src/mojo/public/cpp/bindings/lib/filter_chain.cc

   1 // Copyright 2014 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 "mojo/public/cpp/bindings/lib/filter_chain.h"
   6
   7 #include <algorithm>
   8
   9 #include "mojo/public/cpp/environment/logging.h"
  10
  11 namespace mojo {
  12 namespace internal {
  13
  14 FilterChain::FilterChain(MessageReceiver* sink) : sink_(sink) {
  15 }
  16
  17 FilterChain::FilterChain(RValue other) : sink_(other.object->sink_) {
  18   other.object->sink_ = nullptr;
  19   filters_.swap(other.object->filters_);
  20 }
  21
  22 FilterChain& FilterChain::operator=(RValue other) {
  23   std::swap(sink_, other.object->sink_);
  24   filters_.swap(other.object->filters_);
  25   return *this;
  26 }
  27
  28 FilterChain::~FilterChain() {
  29   for (std::vector<MessageFilter*>::iterator iter = filters_.begin();
  30        iter != filters_.end();
  31        ++iter) {
  32     delete *iter;
  33   }
  34 }
  35
  36 void FilterChain::SetSink(MessageReceiver* sink) {
  37   MOJO_DCHECK(!sink_);
  38   sink_ = sink;
  39   if (!filters_.empty())
  40     filters_.back()->set_sink(sink);
  41 }
  42
  43 MessageReceiver* FilterChain::GetHead() {
  44   MOJO_DCHECK(sink_);
  45   return filters_.empty() ? sink_ : filters_.front();
  46 }
  47
  48 }  // namespace internal
  49 }  // namespace mojo