blob: 20c9f2918489291486a178829563c0e82486534c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
// 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 "base/containers/hash_tables.h"
#include "base/macros.h"
#include "cc/resources/resource_provider.h"
#include "cc/resources/returned_resource.h"
#include "cc/surfaces/surfaces_export.h"
namespace cc {
class SurfaceFactoryClient;
// 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(SurfaceFactoryClient* client);
~SurfaceResourceHolder();
void ReceiveFromChild(const TransferableResourceArray& resources);
void RefResources(const TransferableResourceArray& resources);
void UnrefResources(const ReturnedResourceArray& resources);
private:
SurfaceFactoryClient* client_;
struct ResourceRefs {
ResourceRefs();
int refs_received_from_child;
int refs_holding_resource_alive;
};
// 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.
typedef base::hash_map<ResourceProvider::ResourceId, ResourceRefs>
ResourceIdCountMap;
ResourceIdCountMap resource_id_use_count_map_;
DISALLOW_COPY_AND_ASSIGN(SurfaceResourceHolder);
};
} // namespace cc
#endif // CC_SURFACES_SURFACE_RESOURCE_HOLDER_H_
|
