1 /*
2 * Copyright (C) 2022 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "MemoryPolicy.h"
18
19 #include <android-base/properties.h>
20
21 #include <optional>
22 #include <string_view>
23
24 #include "Properties.h"
25
26 namespace android::uirenderer {
27
28 constexpr static MemoryPolicy sDefaultMemoryPolicy;
29 constexpr static MemoryPolicy sPersistentOrSystemPolicy{
30 .contextTimeout = 10_s,
31 .useAlternativeUiHidden = true,
32 };
33 constexpr static MemoryPolicy sLowRamPolicy{
34 .useAlternativeUiHidden = true,
35 .purgeScratchOnly = false,
36 };
37 constexpr static MemoryPolicy sExtremeLowRam{
38 .initialMaxSurfaceAreaScale = 0.2f,
39 .surfaceSizeMultiplier = 5 * 4.0f,
40 .backgroundRetentionPercent = 0.2f,
41 .contextTimeout = 5_s,
42 .minimumResourceRetention = 1_s,
43 .useAlternativeUiHidden = true,
44 .purgeScratchOnly = false,
45 .releaseContextOnStoppedOnly = true,
46 };
47
loadMemoryPolicy()48 const MemoryPolicy& loadMemoryPolicy() {
49 if (Properties::isSystemOrPersistent) {
50 return sPersistentOrSystemPolicy;
51 }
52 std::string memoryPolicy = base::GetProperty(PROPERTY_MEMORY_POLICY, "");
53 if (memoryPolicy == "default") {
54 return sDefaultMemoryPolicy;
55 }
56 if (memoryPolicy == "lowram") {
57 return sLowRamPolicy;
58 }
59 if (memoryPolicy == "extremelowram") {
60 return sExtremeLowRam;
61 }
62
63 if (Properties::isLowRam) {
64 return sLowRamPolicy;
65 }
66 return sDefaultMemoryPolicy;
67 }
68
69 } // namespace android::uirenderer