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 #include "base/utils/utils.h"
19
20 namespace OHOS::Ace {
21 namespace {
22 // preview not support multi-instance, always using default instance id 0.
23 #if defined(PREVIEW)
24 constexpr int32_t DEFAULT_ID = 0;
25 #else
26 constexpr int32_t DEFAULT_ID = INSTANCE_ID_UNDEFINED;
27 #endif
28
29 std::shared_mutex mutex_;
30 std::set<int32_t> containerSet_;
31 thread_local int32_t currentId_(DEFAULT_ID);
32 std::atomic<int32_t> recentActiveId_(DEFAULT_ID);
33 std::atomic<int32_t> recentForegroundId_(DEFAULT_ID);
34 }
35
CurrentId()36 int32_t ContainerScope::CurrentId()
37 {
38 return currentId_;
39 }
40
DefaultId()41 int32_t ContainerScope::DefaultId()
42 {
43 if (ContainerCount() > 0) {
44 std::shared_lock<std::shared_mutex> lock(mutex_);
45 return *containerSet_.end();
46 }
47 return INSTANCE_ID_UNDEFINED;
48 }
49
SingletonId()50 int32_t ContainerScope::SingletonId()
51 {
52 if (ContainerCount() != 1) {
53 return INSTANCE_ID_UNDEFINED;
54 }
55 std::shared_lock<std::shared_mutex> lock(mutex_);
56 return *containerSet_.begin();
57 }
58
RecentActiveId()59 int32_t ContainerScope::RecentActiveId()
60 {
61 return recentActiveId_.load(std::memory_order_relaxed);
62 }
63
RecentForegroundId()64 int32_t ContainerScope::RecentForegroundId()
65 {
66 return recentForegroundId_.load(std::memory_order_relaxed);
67 }
68
CurrentIdWithReason()69 std::pair<int32_t, InstanceIdGenReason> ContainerScope::CurrentIdWithReason()
70 {
71 int32_t currentId = CurrentId();
72 if (currentId >= 0) {
73 return { currentId, InstanceIdGenReason::SCOPE };
74 }
75 uint32_t containerCount = ContainerCount();
76 if (containerCount == 0) {
77 return { INSTANCE_ID_UNDEFINED, InstanceIdGenReason::UNDEFINED };
78 }
79 if (containerCount == 1) {
80 return { SingletonId(), InstanceIdGenReason::SINGLETON };
81 }
82 currentId = ContainerScope::RecentActiveId();
83 if (currentId >= 0) {
84 return { currentId, InstanceIdGenReason::ACTIVE };
85 }
86 currentId = ContainerScope::RecentForegroundId();
87 if (currentId >= 0) {
88 return { currentId, InstanceIdGenReason::FOREGROUND };
89 }
90 return { ContainerScope::DefaultId(), InstanceIdGenReason::DEFAULT };
91 }
92
UpdateCurrent(int32_t id)93 void ContainerScope::UpdateCurrent(int32_t id)
94 {
95 currentId_ = id;
96 }
97
UpdateRecentActive(int32_t id)98 void ContainerScope::UpdateRecentActive(int32_t id)
99 {
100 recentActiveId_.store(id, std::memory_order_relaxed);
101 }
102
UpdateRecentForeground(int32_t id)103 void ContainerScope::UpdateRecentForeground(int32_t id)
104 {
105 recentForegroundId_.store(id, std::memory_order_relaxed);
106 }
107
ContainerCount()108 uint32_t ContainerScope::ContainerCount()
109 {
110 std::shared_lock<std::shared_mutex> lock(mutex_);
111 return static_cast<uint32_t>(containerSet_.size());
112 }
113
Add(int32_t id)114 void ContainerScope::Add(int32_t id)
115 {
116 std::unique_lock<std::shared_mutex> lock(mutex_);
117 containerSet_.emplace(id);
118 }
119
Remove(int32_t id)120 void ContainerScope::Remove(int32_t id)
121 {
122 std::unique_lock<std::shared_mutex> lock(mutex_);
123 containerSet_.erase(id);
124 }
125
RemoveAndCheck(int32_t id)126 void ContainerScope::RemoveAndCheck(int32_t id)
127 {
128 Remove(id);
129 if (RecentActiveId() == id) {
130 UpdateRecentActive(INSTANCE_ID_UNDEFINED);
131 }
132 if (RecentForegroundId() == id) {
133 UpdateRecentForeground(INSTANCE_ID_UNDEFINED);
134 }
135 }
136
137 } // namespace OHOS::Ace
138