1 /*
2 * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "core/common/container_scope.h"
17 #include "core/common/container_consts.h"
18
19 namespace OHOS::Ace {
20 namespace {
21 // preview not support multi-instance, always using default instance id 0.
22 #if defined(PREVIEW)
23 constexpr int32_t DEFAULT_ID = 0;
24 #else
25 constexpr int32_t DEFAULT_ID = INSTANCE_ID_UNDEFINED;
26 #endif
27
28 std::shared_mutex mutex_;
29 std::set<int32_t> containerSet_;
30 thread_local int32_t currentId_(DEFAULT_ID);
31 std::atomic<int32_t> recentActiveId_(DEFAULT_ID);
32 std::atomic<int32_t> recentForegroundId_(DEFAULT_ID);
33 }
34
CurrentId()35 int32_t ContainerScope::CurrentId()
36 {
37 return currentId_;
38 }
39
DefaultId()40 int32_t ContainerScope::DefaultId()
41 {
42 if (ContainerCount() > 0) {
43 std::shared_lock<std::shared_mutex> lock(mutex_);
44 return *containerSet_.rbegin();
45 }
46 return INSTANCE_ID_UNDEFINED;
47 }
48
SingletonId()49 int32_t ContainerScope::SingletonId()
50 {
51 if (ContainerCount() != 1) {
52 return INSTANCE_ID_UNDEFINED;
53 }
54 std::shared_lock<std::shared_mutex> lock(mutex_);
55 return *containerSet_.begin();
56 }
57
RecentActiveId()58 int32_t ContainerScope::RecentActiveId()
59 {
60 return recentActiveId_.load(std::memory_order_relaxed);
61 }
62
RecentForegroundId()63 int32_t ContainerScope::RecentForegroundId()
64 {
65 return recentForegroundId_.load(std::memory_order_relaxed);
66 }
67
CurrentIdWithReason()68 std::pair<int32_t, InstanceIdGenReason> ContainerScope::CurrentIdWithReason()
69 {
70 int32_t currentId = CurrentId();
71 if (currentId >= 0) {
72 return { currentId, InstanceIdGenReason::SCOPE };
73 }
74 uint32_t containerCount = ContainerCount();
75 if (containerCount == 0) {
76 return { INSTANCE_ID_UNDEFINED, InstanceIdGenReason::UNDEFINED };
77 }
78 if (containerCount == 1) {
79 return { SingletonId(), InstanceIdGenReason::SINGLETON };
80 }
81 currentId = ContainerScope::RecentActiveId();
82 if (currentId >= 0) {
83 return { currentId, InstanceIdGenReason::ACTIVE };
84 }
85 currentId = ContainerScope::RecentForegroundId();
86 if (currentId >= 0) {
87 return { currentId, InstanceIdGenReason::FOREGROUND };
88 }
89 return { ContainerScope::DefaultId(), InstanceIdGenReason::DEFAULT };
90 }
91
UpdateCurrent(int32_t id)92 void ContainerScope::UpdateCurrent(int32_t id)
93 {
94 currentId_ = id;
95 }
96
UpdateRecentActive(int32_t id)97 void ContainerScope::UpdateRecentActive(int32_t id)
98 {
99 recentActiveId_.store(id, std::memory_order_relaxed);
100 }
101
UpdateRecentForeground(int32_t id)102 void ContainerScope::UpdateRecentForeground(int32_t id)
103 {
104 recentForegroundId_.store(id, std::memory_order_relaxed);
105 }
106
ContainerCount()107 uint32_t ContainerScope::ContainerCount()
108 {
109 std::shared_lock<std::shared_mutex> lock(mutex_);
110 return static_cast<uint32_t>(containerSet_.size());
111 }
112
Add(int32_t id)113 void ContainerScope::Add(int32_t id)
114 {
115 std::unique_lock<std::shared_mutex> lock(mutex_);
116 containerSet_.emplace(id);
117 }
118
Remove(int32_t id)119 void ContainerScope::Remove(int32_t id)
120 {
121 std::unique_lock<std::shared_mutex> lock(mutex_);
122 containerSet_.erase(id);
123 }
124
RemoveAndCheck(int32_t id)125 void ContainerScope::RemoveAndCheck(int32_t id)
126 {
127 Remove(id);
128 if (RecentActiveId() == id) {
129 UpdateRecentActive(INSTANCE_ID_UNDEFINED);
130 }
131 if (RecentForegroundId() == id) {
132 UpdateRecentForeground(INSTANCE_ID_UNDEFINED);
133 }
134 }
135
136 } // namespace OHOS::Ace
137