1 /*
2 * Copyright (c) 2024 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 "SceneTimerOhImpl.h"
17 #include <sys/prctl.h>
18 #include <chrono>
19 #include <thread>
20 #include "hiview_logger.h"
21
22 DEFINE_LOG_LABEL(0xD002D66, "Hiview-XPerformance");
23
24 using namespace std::chrono;
25
26 const static std::string TIMER_THREAD_NAME = "XperfTimerThr";
27
SceneTimerOhImpl()28 SceneTimerOhImpl::SceneTimerOhImpl()
29 {
30 std::thread timerThread(&SceneTimerOhImpl::Loop, this);
31 timerThread.detach();
32 }
33
RegUser(int userId,ICb * cb)34 void SceneTimerOhImpl::RegUser(int userId, ICb* cb)
35 {
36 callbacks[userId] = cb;
37 }
38
UnRegUser(int userId)39 void SceneTimerOhImpl::UnRegUser(int userId)
40 {
41 callbacks.erase(userId);
42 }
43
Start(int user,int id,long interval)44 void SceneTimerOhImpl::Start(int user, int id, long interval)
45 {
46 int key = BuildRecordKey(user, id);
47 ValidateDuplication(key);
48 long long expireTs = CalcExpireTimeStamp(interval);
49 FillRecordAndNotify(key, expireTs);
50 }
51
Stop(int user,int id)52 void SceneTimerOhImpl::Stop(int user, int id)
53 {
54 int key = BuildRecordKey(user, id);
55 ValidateExistence(key);
56 RemoveRecordAndNotify(key);
57 }
58
Loop()59 void SceneTimerOhImpl::Loop()
60 {
61 std::unique_lock<std::mutex> uniqueLock(mut);
62 prctl(PR_SET_NAME, TIMER_THREAD_NAME.c_str(), nullptr, nullptr, nullptr);
63 milliseconds interval(checkInterval);
64 while (true) {
65 if (!records.empty()) {
66 cv.wait_for(uniqueLock, interval);
67 /* note the lock is held now */
68 CheckRecordsAndTrigger();
69 continue;
70 }
71 cv.wait(uniqueLock);
72 }
73 }
74
FillRecordAndNotify(int key,long long expireTs)75 void SceneTimerOhImpl::FillRecordAndNotify(int key, long long expireTs)
76 {
77 std::unique_lock<std::mutex> uniqueLock(mut);
78 // I believe this double-check is needed
79 if (records.find(key) != records.end()) {
80 throw std::invalid_argument("duplicated id");
81 }
82 records.emplace(key, expireTs);
83 cv.notify_all(); // remember this
84 }
85
ValidateDuplication(int key)86 void SceneTimerOhImpl::ValidateDuplication(int key)
87 {
88 std::unique_lock<std::mutex> uniqueLock(mut);
89 if (records.find(key) != records.end()) {
90 throw std::invalid_argument("duplicated id");
91 }
92 }
93
ValidateExistence(int key)94 void SceneTimerOhImpl::ValidateExistence(int key)
95 {
96 std::unique_lock<std::mutex> uniqueLock(mut);
97 if (records.find(key) == records.end()) {
98 throw std::invalid_argument("non-existing id");
99 }
100 }
101
GetCurTimeStamp()102 long long SceneTimerOhImpl::GetCurTimeStamp()
103 {
104 milliseconds ms = duration_cast<milliseconds>(system_clock::now().time_since_epoch());
105 return ms.count();
106 }
107
108 /* already have lock */
CheckRecordsAndTrigger()109 void SceneTimerOhImpl::CheckRecordsAndTrigger()
110 {
111 long long nowMs = GetCurTimeStamp();
112 for (std::map<int, long long>::iterator it = records.begin(); it != records.end();) {
113 long long expire = it->second;
114 int key = it->first;
115 if (nowMs >= expire) {
116 it = records.erase(it);
117 TriggerCallbak(key);
118 } else {
119 it++;
120 }
121 }
122 }
123
BuildRecordKey(int user,int id)124 int SceneTimerOhImpl::BuildRecordKey(int user, int id)
125 {
126 if (user >= maxUserId) {
127 throw std::invalid_argument("exceeds max user id");
128 }
129 if (id >= maxRecordPerUser) {
130 throw std::invalid_argument("exceeds max id per user");
131 }
132 int ret = user * maxRecordPerUser + id;
133 return ret;
134 }
135
CalcExpireTimeStamp(long delay)136 long long SceneTimerOhImpl::CalcExpireTimeStamp(long delay)
137 {
138 long long nowMs = GetCurTimeStamp();
139 long long expire = nowMs + delay;
140 return expire;
141 }
142
TriggerCallbak(int recordKey)143 void SceneTimerOhImpl::TriggerCallbak(int recordKey)
144 {
145 int user = ExtractUserFromRecordKey(recordKey);
146 int id = ExtractIdFromRecordKey(recordKey);
147 try {
148 ICb* cb = callbacks.at(user);
149 if (cb == nullptr) {
150 HIVIEW_LOGE("SceneTimerImpl::TriggerCallbak cb is null");
151 return;
152 }
153 cb->Expired(id);
154 }
155 catch (const std::out_of_range& outex) {
156 HIVIEW_LOGE("SceneTimerImpl::back id=%{public}d;user=%{public}d;key=%{public}d;", id, user, recordKey);
157 }
158 }
159
ExtractUserFromRecordKey(int key)160 int SceneTimerOhImpl::ExtractUserFromRecordKey(int key)
161 {
162 return key / maxRecordPerUser;
163 }
164
ExtractIdFromRecordKey(int key)165 int SceneTimerOhImpl::ExtractIdFromRecordKey(int key)
166 {
167 return key % maxRecordPerUser;
168 }
169
RemoveRecordAndNotify(int key)170 void SceneTimerOhImpl::RemoveRecordAndNotify(int key)
171 {
172 std::unique_lock<std::mutex> uniqueLock(mut);
173 records.erase(records.find(key));
174 cv.notify_all();
175 }
176