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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 "cc/surfaces/surface_resource_holder.h"
#include "cc/surfaces/surface_factory_client.h"
namespace cc {
SurfaceResourceHolder::SurfaceResourceHolder(SurfaceFactoryClient* client)
: client_(client) {
}
SurfaceResourceHolder::~SurfaceResourceHolder() {
}
SurfaceResourceHolder::ResourceRefs::ResourceRefs()
: refs_received_from_child(0), refs_holding_resource_alive(0) {
}
void SurfaceResourceHolder::ReceiveFromChild(
const TransferableResourceArray& resources) {
for (TransferableResourceArray::const_iterator it = resources.begin();
it != resources.end();
++it) {
ResourceRefs& ref = resource_id_use_count_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) {
ResourceIdCountMap::iterator count_it =
resource_id_use_count_map_.find(it->id);
DCHECK(count_it != resource_id_use_count_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) {
ResourceProvider::ResourceId id = it->id;
ResourceIdCountMap::iterator count_it = resource_id_use_count_map_.find(id);
if (count_it == resource_id_use_count_map_.end())
continue;
ResourceRefs& ref = count_it->second;
ref.refs_holding_resource_alive -= it->count;
if (ref.refs_holding_resource_alive == 0) {
ReturnedResource returned = *it;
returned.count = ref.refs_received_from_child;
resources_available_to_return.push_back(returned);
resource_id_use_count_map_.erase(count_it);
}
}
client_->ReturnResources(resources_available_to_return);
}
} // namespace cc
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