blob: dff955cbde28f294bf2c3cb0c5410366339e4b48 [file] [log] [blame]
// 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 "cc/surfaces/surface_resource_holder.h"
#include "cc/surfaces/surface_resource_holder_client.h"
namespace cc {
SurfaceResourceHolder::SurfaceResourceHolder(
SurfaceResourceHolderClient* client)
: client_(client) {}
SurfaceResourceHolder::~SurfaceResourceHolder() {
}
SurfaceResourceHolder::ResourceRefs::ResourceRefs()
: refs_received_from_child(0), refs_holding_resource_alive(0) {
}
void SurfaceResourceHolder::Reset() {
resource_id_info_map_.clear();
}
void SurfaceResourceHolder::ReceiveFromChild(
const TransferableResourceArray& resources) {
for (TransferableResourceArray::const_iterator it = resources.begin();
it != resources.end();
++it) {
ResourceRefs& ref = resource_id_info_map_[it->id];
ref.refs_holding_resource_alive++;
ref.refs_received_from_child++;
}
}
void SurfaceResourceHolder::RefResources(
const TransferableResourceArray& resources) {
for (TransferableResourceArray::const_iterator it = resources.begin();
it != resources.end();
++it) {
ResourceIdInfoMap::iterator count_it = resource_id_info_map_.find(it->id);
DCHECK(count_it != resource_id_info_map_.end());
count_it->second.refs_holding_resource_alive++;
}
}
void SurfaceResourceHolder::UnrefResources(
const ReturnedResourceArray& resources) {
ReturnedResourceArray resources_available_to_return;
for (ReturnedResourceArray::const_iterator it = resources.begin();
it != resources.end();
++it) {
unsigned id = it->id;
ResourceIdInfoMap::iterator count_it = resource_id_info_map_.find(id);
if (count_it == resource_id_info_map_.end())
continue;
ResourceRefs& ref = count_it->second;
ref.refs_holding_resource_alive -= it->count;
// Keep the newest return sync token that has data.
// TODO(jbauman): Handle the case with two valid sync tokens.
if (it->sync_token.HasData())
ref.sync_token = it->sync_token;
if (ref.refs_holding_resource_alive == 0) {
ReturnedResource returned = *it;
returned.sync_token = ref.sync_token;
returned.count = ref.refs_received_from_child;
resources_available_to_return.push_back(returned);
resource_id_info_map_.erase(count_it);
}
}
client_->ReturnResources(resources_available_to_return);
}
} // namespace cc