src/content/renderer/gpu/frame_swap_message_queue.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 "content/renderer/gpu/frame_swap_message_queue.h"
   6
   7 #include <limits>
   8
   9 #include "base/containers/hash_tables.h"
  10 #include "base/logging.h"
  11 #include "base/stl_util.h"
  12 #include "ipc/ipc_message.h"
  13
  14 using std::vector;
  15
  16 namespace content {
  17
  18 class FrameSwapMessageSubQueue {
  19  public:
  20   FrameSwapMessageSubQueue() {}
  21   virtual ~FrameSwapMessageSubQueue() {}
  22   virtual bool Empty() const = 0;
  23   virtual void QueueMessage(int source_frame_number,
  24                             scoped_ptr<IPC::Message> msg,
  25                             bool* is_first) = 0;
  26   virtual void DrainMessages(int source_frame_number,
  27                              ScopedVector<IPC::Message>* messages) = 0;
  28
  29  private:
  30   DISALLOW_COPY_AND_ASSIGN(FrameSwapMessageSubQueue);
  31 };
  32
  33 namespace {
  34
  35 // Queue specific to MESSAGE_DELIVERY_POLICY_WITH_VISUAL_STATE.
  36 class SendMessageScopeImpl : public FrameSwapMessageQueue::SendMessageScope {
  37  public:
  38   SendMessageScopeImpl(base::Lock* lock) : auto_lock_(*lock) {}
  39   ~SendMessageScopeImpl() override {}
  40
  41  private:
  42   base::AutoLock auto_lock_;
  43 };
  44
  45 class VisualStateQueue : public FrameSwapMessageSubQueue {
  46  public:
  47   VisualStateQueue() {}
  48
  49   ~VisualStateQueue() override {
  50     for (VisualStateQueueMap::iterator i = queue_.begin(); i != queue_.end();
  51          i++) {
  52       STLDeleteElements(&i->second);
  53     }
  54   }
  55
  56   bool Empty() const override { return queue_.empty(); }
  57
  58   void QueueMessage(int source_frame_number,
  59                     scoped_ptr<IPC::Message> msg,
  60                     bool* is_first) override {
  61     if (is_first)
  62       *is_first = (queue_.count(source_frame_number) == 0);
  63
  64     queue_[source_frame_number].push_back(msg.release());
  65   }
  66
  67   void DrainMessages(int source_frame_number,
  68                      ScopedVector<IPC::Message>* messages) override {
  69     VisualStateQueueMap::iterator end = queue_.upper_bound(source_frame_number);
  70     for (VisualStateQueueMap::iterator i = queue_.begin(); i != end; i++) {
  71       DCHECK(i->first <= source_frame_number);
  72       messages->insert(messages->end(), i->second.begin(), i->second.end());
  73       i->second.clear();
  74     }
  75     queue_.erase(queue_.begin(), end);
  76   }
  77
  78  private:
  79   typedef std::map<int, std::vector<IPC::Message*> > VisualStateQueueMap;
  80   VisualStateQueueMap queue_;
  81
  82   DISALLOW_COPY_AND_ASSIGN(VisualStateQueue);
  83 };
  84
  85 // Queue specific to MESSAGE_DELIVERY_POLICY_WITH_NEXT_SWAP.
  86 class SwapQueue : public FrameSwapMessageSubQueue {
  87  public:
  88   SwapQueue() {}
  89   bool Empty() const override { return queue_.empty(); }
  90
  91   void QueueMessage(int source_frame_number,
  92                     scoped_ptr<IPC::Message> msg,
  93                     bool* is_first) override {
  94     if (is_first)
  95       *is_first = Empty();
  96     queue_.push_back(msg.release());
  97   }
  98
  99   void DrainMessages(int source_frame_number,
 100                      ScopedVector<IPC::Message>* messages) override {
 101     messages->insert(messages->end(), queue_.begin(), queue_.end());
 102     queue_.weak_clear();
 103   }
 104
 105  private:
 106   ScopedVector<IPC::Message> queue_;
 107
 108   DISALLOW_COPY_AND_ASSIGN(SwapQueue);
 109 };
 110
 111 }  // namespace
 112
 113 FrameSwapMessageQueue::FrameSwapMessageQueue()
 114     : visual_state_queue_(new VisualStateQueue()),
 115       swap_queue_(new SwapQueue()) {
 116 }
 117
 118 FrameSwapMessageQueue::~FrameSwapMessageQueue() {
 119 }
 120
 121 bool FrameSwapMessageQueue::Empty() const {
 122   base::AutoLock lock(lock_);
 123   return next_drain_messages_.empty() && visual_state_queue_->Empty() &&
 124          swap_queue_->Empty();
 125 }
 126
 127 FrameSwapMessageSubQueue* FrameSwapMessageQueue::GetSubQueue(
 128     MessageDeliveryPolicy policy) {
 129   switch (policy) {
 130     case MESSAGE_DELIVERY_POLICY_WITH_NEXT_SWAP:
 131       return swap_queue_.get();
 132       break;
 133     case MESSAGE_DELIVERY_POLICY_WITH_VISUAL_STATE:
 134       return visual_state_queue_.get();
 135       break;
 136   }
 137   NOTREACHED();
 138   return NULL;
 139 }
 140
 141 void FrameSwapMessageQueue::QueueMessageForFrame(MessageDeliveryPolicy policy,
 142                                                  int source_frame_number,
 143                                                  scoped_ptr<IPC::Message> msg,
 144                                                  bool* is_first) {
 145   base::AutoLock lock(lock_);
 146   GetSubQueue(policy)->QueueMessage(source_frame_number, msg.Pass(), is_first);
 147 }
 148
 149 void FrameSwapMessageQueue::DidSwap(int source_frame_number) {
 150   base::AutoLock lock(lock_);
 151
 152   visual_state_queue_->DrainMessages(source_frame_number,
 153                                      &next_drain_messages_);
 154 }
 155
 156 void FrameSwapMessageQueue::DidNotSwap(int source_frame_number,
 157                                        cc::SwapPromise::DidNotSwapReason reason,
 158                                        ScopedVector<IPC::Message>* messages) {
 159   base::AutoLock lock(lock_);
 160   switch (reason) {
 161     case cc::SwapPromise::SWAP_FAILS:
 162     case cc::SwapPromise::COMMIT_NO_UPDATE:
 163       swap_queue_->DrainMessages(source_frame_number, messages);
 164     // fallthrough
 165     case cc::SwapPromise::COMMIT_FAILS:
 166       visual_state_queue_->DrainMessages(source_frame_number, messages);
 167       break;
 168     default:
 169       NOTREACHED();
 170   }
 171 }
 172
 173 void FrameSwapMessageQueue::DrainMessages(
 174     ScopedVector<IPC::Message>* messages) {
 175   lock_.AssertAcquired();
 176
 177   swap_queue_->DrainMessages(0, messages);
 178   messages->insert(messages->end(),
 179                    next_drain_messages_.begin(),
 180                    next_drain_messages_.end());
 181   next_drain_messages_.weak_clear();
 182 }
 183
 184 scoped_ptr<FrameSwapMessageQueue::SendMessageScope>
 185 FrameSwapMessageQueue::AcquireSendMessageScope() {
 186   return make_scoped_ptr(new SendMessageScopeImpl(&lock_));
 187 }
 188
 189 // static
 190 void FrameSwapMessageQueue::TransferMessages(ScopedVector<IPC::Message>& source,
 191                                              vector<IPC::Message>* dest) {
 192   for (vector<IPC::Message*>::iterator i = source.begin(); i != source.end();
 193        ++i) {
 194     IPC::Message* m(*i);
 195     dest->push_back(*m);
 196     delete m;
 197   }
 198   source.weak_clear();
 199 }
 200
 201 }  // namespace content