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// Copyright 2014 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 "content/renderer/gpu/frame_swap_message_queue.h"
#include <limits>
#include "base/containers/hash_tables.h"
#include "base/logging.h"
#include "base/stl_util.h"
#include "ipc/ipc_message.h"
using std::vector;
namespace content {
class FrameSwapMessageSubQueue {
public:
FrameSwapMessageSubQueue() {}
virtual ~FrameSwapMessageSubQueue() {}
virtual bool Empty() const = 0;
virtual void QueueMessage(int source_frame_number,
scoped_ptr<IPC::Message> msg,
bool* is_first) = 0;
virtual void DrainMessages(int source_frame_number,
ScopedVector<IPC::Message>* messages) = 0;
private:
DISALLOW_COPY_AND_ASSIGN(FrameSwapMessageSubQueue);
};
namespace {
// Queue specific to MESSAGE_DELIVERY_POLICY_WITH_VISUAL_STATE.
class SendMessageScopeImpl : public FrameSwapMessageQueue::SendMessageScope {
public:
SendMessageScopeImpl(base::Lock* lock) : auto_lock_(*lock) {}
~SendMessageScopeImpl() override {}
private:
base::AutoLock auto_lock_;
};
class VisualStateQueue : public FrameSwapMessageSubQueue {
public:
VisualStateQueue() {}
~VisualStateQueue() override {
for (VisualStateQueueMap::iterator i = queue_.begin(); i != queue_.end();
i++) {
STLDeleteElements(&i->second);
}
}
bool Empty() const override { return queue_.empty(); }
void QueueMessage(int source_frame_number,
scoped_ptr<IPC::Message> msg,
bool* is_first) override {
if (is_first)
*is_first = (queue_.count(source_frame_number) == 0);
queue_[source_frame_number].push_back(msg.release());
}
void DrainMessages(int source_frame_number,
ScopedVector<IPC::Message>* messages) override {
VisualStateQueueMap::iterator end = queue_.upper_bound(source_frame_number);
for (VisualStateQueueMap::iterator i = queue_.begin(); i != end; i++) {
DCHECK(i->first <= source_frame_number);
messages->insert(messages->end(), i->second.begin(), i->second.end());
i->second.clear();
}
queue_.erase(queue_.begin(), end);
}
private:
typedef std::map<int, std::vector<IPC::Message*> > VisualStateQueueMap;
VisualStateQueueMap queue_;
DISALLOW_COPY_AND_ASSIGN(VisualStateQueue);
};
// Queue specific to MESSAGE_DELIVERY_POLICY_WITH_NEXT_SWAP.
class SwapQueue : public FrameSwapMessageSubQueue {
public:
SwapQueue() {}
bool Empty() const override { return queue_.empty(); }
void QueueMessage(int source_frame_number,
scoped_ptr<IPC::Message> msg,
bool* is_first) override {
if (is_first)
*is_first = Empty();
queue_.push_back(msg.release());
}
void DrainMessages(int source_frame_number,
ScopedVector<IPC::Message>* messages) override {
messages->insert(messages->end(), queue_.begin(), queue_.end());
queue_.weak_clear();
}
private:
ScopedVector<IPC::Message> queue_;
DISALLOW_COPY_AND_ASSIGN(SwapQueue);
};
} // namespace
FrameSwapMessageQueue::FrameSwapMessageQueue()
: visual_state_queue_(new VisualStateQueue()),
swap_queue_(new SwapQueue()) {
}
FrameSwapMessageQueue::~FrameSwapMessageQueue() {
}
bool FrameSwapMessageQueue::Empty() const {
base::AutoLock lock(lock_);
return next_drain_messages_.empty() && visual_state_queue_->Empty() &&
swap_queue_->Empty();
}
FrameSwapMessageSubQueue* FrameSwapMessageQueue::GetSubQueue(
MessageDeliveryPolicy policy) {
switch (policy) {
case MESSAGE_DELIVERY_POLICY_WITH_NEXT_SWAP:
return swap_queue_.get();
break;
case MESSAGE_DELIVERY_POLICY_WITH_VISUAL_STATE:
return visual_state_queue_.get();
break;
}
NOTREACHED();
return NULL;
}
void FrameSwapMessageQueue::QueueMessageForFrame(MessageDeliveryPolicy policy,
int source_frame_number,
scoped_ptr<IPC::Message> msg,
bool* is_first) {
base::AutoLock lock(lock_);
GetSubQueue(policy)->QueueMessage(source_frame_number, msg.Pass(), is_first);
}
void FrameSwapMessageQueue::DidSwap(int source_frame_number) {
base::AutoLock lock(lock_);
visual_state_queue_->DrainMessages(source_frame_number,
&next_drain_messages_);
}
void FrameSwapMessageQueue::DidNotSwap(int source_frame_number,
cc::SwapPromise::DidNotSwapReason reason,
ScopedVector<IPC::Message>* messages) {
base::AutoLock lock(lock_);
switch (reason) {
case cc::SwapPromise::SWAP_FAILS:
case cc::SwapPromise::COMMIT_NO_UPDATE:
swap_queue_->DrainMessages(source_frame_number, messages);
// fallthrough
case cc::SwapPromise::COMMIT_FAILS:
visual_state_queue_->DrainMessages(source_frame_number, messages);
break;
default:
NOTREACHED();
}
}
void FrameSwapMessageQueue::DrainMessages(
ScopedVector<IPC::Message>* messages) {
lock_.AssertAcquired();
swap_queue_->DrainMessages(0, messages);
messages->insert(messages->end(),
next_drain_messages_.begin(),
next_drain_messages_.end());
next_drain_messages_.weak_clear();
}
scoped_ptr<FrameSwapMessageQueue::SendMessageScope>
FrameSwapMessageQueue::AcquireSendMessageScope() {
return make_scoped_ptr(new SendMessageScopeImpl(&lock_));
}
// static
void FrameSwapMessageQueue::TransferMessages(ScopedVector<IPC::Message>& source,
vector<IPC::Message>* dest) {
for (vector<IPC::Message*>::iterator i = source.begin(); i != source.end();
++i) {
IPC::Message* m(*i);
dest->push_back(*m);
delete m;
}
source.weak_clear();
}
} // namespace content
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