| // 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. |
| |
| #ifndef CC_SURFACES_SURFACE_RESOURCE_HOLDER_H_ |
| #define CC_SURFACES_SURFACE_RESOURCE_HOLDER_H_ |
| |
| #include <unordered_map> |
| |
| #include "base/macros.h" |
| #include "cc/base/resource_id.h" |
| #include "cc/resources/returned_resource.h" |
| #include "cc/resources/transferable_resource.h" |
| #include "cc/surfaces/surfaces_export.h" |
| |
| namespace cc { |
| class SurfaceResourceHolderClient; |
| |
| // A SurfaceResourceHolder manages the lifetime of resources submitted by a |
| // particular SurfaceFactory. Each resource is held by the service until |
| // it is no longer referenced by any pending frames or by any |
| // resource providers. |
| class CC_SURFACES_EXPORT SurfaceResourceHolder { |
| public: |
| explicit SurfaceResourceHolder(SurfaceResourceHolderClient* client); |
| ~SurfaceResourceHolder(); |
| |
| void Reset(); |
| void ReceiveFromChild(const TransferableResourceArray& resources); |
| void RefResources(const TransferableResourceArray& resources); |
| void UnrefResources(const ReturnedResourceArray& resources); |
| |
| private: |
| SurfaceResourceHolderClient* client_; |
| |
| struct ResourceRefs { |
| ResourceRefs(); |
| |
| int refs_received_from_child; |
| int refs_holding_resource_alive; |
| gpu::SyncToken sync_token; |
| }; |
| // Keeps track of the number of users currently in flight for each resource |
| // ID we've received from the client. When this counter hits zero for a |
| // particular resource, that ID is available to return to the client with |
| // the most recently given non-empty sync token. |
| using ResourceIdInfoMap = std::unordered_map<ResourceId, ResourceRefs>; |
| ResourceIdInfoMap resource_id_info_map_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SurfaceResourceHolder); |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_SURFACES_SURFACE_RESOURCE_HOLDER_H_ |