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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 <algorithm>
#include <limits>
#include <memory>
#include <utility>
#include "base/containers/hash_tables.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/memory/ptr_util.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,
std::unique_ptr<IPC::Message> msg,
bool* is_first) = 0;
virtual void DrainMessages(
int source_frame_number,
std::vector<std::unique_ptr<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() = default;
~VisualStateQueue() override = default;
bool Empty() const override { return queue_.empty(); }
void QueueMessage(int source_frame_number,
std::unique_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(std::move(msg));
}
void DrainMessages(
int source_frame_number,
std::vector<std::unique_ptr<IPC::Message>>* messages) override {
auto end = queue_.upper_bound(source_frame_number);
for (auto i = queue_.begin(); i != end; i++) {
DCHECK(i->first <= source_frame_number);
std::move(i->second.begin(), i->second.end(),
std::back_inserter(*messages));
}
queue_.erase(queue_.begin(), end);
}
private:
std::map<int, std::vector<std::unique_ptr<IPC::Message>>> 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,
std::unique_ptr<IPC::Message> msg,
bool* is_first) override {
if (is_first)
*is_first = Empty();
queue_.push_back(std::move(msg));
}
void DrainMessages(
int source_frame_number,
std::vector<std::unique_ptr<IPC::Message>>* messages) override {
std::move(queue_.begin(), queue_.end(), std::back_inserter(*messages));
queue_.clear();
}
private:
std::vector<std::unique_ptr<IPC::Message>> queue_;
DISALLOW_COPY_AND_ASSIGN(SwapQueue);
};
} // namespace
FrameSwapMessageQueue::FrameSwapMessageQueue(int32_t routing_id)
: visual_state_queue_(new VisualStateQueue()),
swap_queue_(new SwapQueue()),
routing_id_(routing_id) {
DETACH_FROM_THREAD(impl_thread_checker_);
}
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 nullptr;
}
void FrameSwapMessageQueue::QueueMessageForFrame(
MessageDeliveryPolicy policy,
int source_frame_number,
std::unique_ptr<IPC::Message> msg,
bool* is_first) {
base::AutoLock lock(lock_);
GetSubQueue(policy)
->QueueMessage(source_frame_number, std::move(msg), is_first);
}
void FrameSwapMessageQueue::DidActivate(int source_frame_number) {
base::AutoLock lock(lock_);
visual_state_queue_->DrainMessages(source_frame_number,
&next_drain_messages_);
}
void FrameSwapMessageQueue::DidSwap(int source_frame_number) {
base::AutoLock lock(lock_);
swap_queue_->DrainMessages(0, &next_drain_messages_);
}
void FrameSwapMessageQueue::DidNotSwap(
int source_frame_number,
cc::SwapPromise::DidNotSwapReason reason,
std::vector<std::unique_ptr<IPC::Message>>* messages) {
base::AutoLock lock(lock_);
switch (reason) {
case cc::SwapPromise::SWAP_FAILS:
case cc::SwapPromise::COMMIT_NO_UPDATE:
DrainMessages(messages);
swap_queue_->DrainMessages(source_frame_number, messages);
visual_state_queue_->DrainMessages(source_frame_number, messages);
break;
case cc::SwapPromise::COMMIT_FAILS:
case cc::SwapPromise::ACTIVATION_FAILS:
// Do not queue any responses here. If ACTIVATION_FAILS or
// COMMIT_FAILS the renderer is shutting down, which will result
// in the RenderFrameHostImpl destructor firing the remaining
// response callbacks itself.
break;
}
}
void FrameSwapMessageQueue::DrainMessages(
std::vector<std::unique_ptr<IPC::Message>>* messages) {
lock_.AssertAcquired();
std::move(next_drain_messages_.begin(), next_drain_messages_.end(),
std::back_inserter(*messages));
next_drain_messages_.clear();
}
std::unique_ptr<FrameSwapMessageQueue::SendMessageScope>
FrameSwapMessageQueue::AcquireSendMessageScope() {
return std::make_unique<SendMessageScopeImpl>(&lock_);
}
// static
void FrameSwapMessageQueue::TransferMessages(
std::vector<std::unique_ptr<IPC::Message>>* source,
vector<IPC::Message>* dest) {
for (const auto& msg : *source) {
dest->push_back(*msg.get());
}
source->clear();
}
uint32_t FrameSwapMessageQueue::AllocateFrameToken() {
return ++last_used_frame_token_;
}
void FrameSwapMessageQueue::NotifyFramesAreDiscarded(
bool frames_are_discarded) {
DCHECK_CALLED_ON_VALID_THREAD(impl_thread_checker_);
frames_are_discarded_ = frames_are_discarded;
}
bool FrameSwapMessageQueue::AreFramesDiscarded() {
DCHECK_CALLED_ON_VALID_THREAD(impl_thread_checker_);
return frames_are_discarded_;
}
} // namespace content
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