1 /*
2 * Copyright (C) 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 "task_thread.h"
17 #include "avcodec_log.h"
18
19 namespace {
20 constexpr OHOS::HiviewDFX::HiLogLabel LABEL = {LOG_CORE, LOG_DOMAIN_FRAMEWORK, "TaskThread"};
21 constexpr uint8_t LOGD_FREQUENCY = 100;
22 }
23 namespace OHOS {
24 namespace MediaAVCodec {
TaskThread(std::string_view name)25 TaskThread::TaskThread(std::string_view name) : name_(name), runningState_(RunningState::STOPPED), loop_(nullptr)
26 {
27 AVCODEC_LOGD("task %{public}s ctor called", name_.data());
28 }
29
TaskThread(std::string_view name,std::function<void ()> handler)30 TaskThread::TaskThread(std::string_view name, std::function<void()> handler) : TaskThread(name)
31 {
32 handler_ = std::move(handler);
33 loop_ = std::make_unique<std::thread>(&TaskThread::Run, this);
34 }
35
~TaskThread()36 TaskThread::~TaskThread()
37 {
38 AVCODEC_LOGD("task %{public}s dtor called", name_.data());
39 runningState_ = RunningState::STOPPED;
40 syncCond_.notify_all();
41
42 if (loop_ != nullptr) {
43 if (loop_->joinable()) {
44 loop_->join();
45 }
46 loop_ = nullptr;
47 }
48 }
49
Start()50 void TaskThread::Start()
51 {
52 std::unique_lock lock(stateMutex_);
53 if (runningState_.load() == RunningState::STOPPING) {
54 syncCond_.wait(lock, [this] { return runningState_.load() == RunningState::STOPPED; });
55 }
56 if (runningState_.load() == RunningState::STOPPED) {
57 if (loop_ != nullptr) {
58 if (loop_->joinable()) {
59 loop_->join();
60 }
61 loop_ = nullptr;
62 }
63 }
64
65 runningState_ = RunningState::STARTED;
66
67 if (!loop_) { // thread not exist
68 loop_ = std::make_unique<std::thread>(&TaskThread::Run, this);
69 }
70 syncCond_.notify_all();
71 AVCODEC_LOGD("task %{public}s start called", name_.data());
72 }
73
Stop()74 void TaskThread::Stop()
75 {
76 AVCODEC_LOGD("task %{public}s stop entered, current state: %{public}d", name_.data(), runningState_.load());
77 std::unique_lock lock(stateMutex_);
78 if (runningState_.load() != RunningState::STOPPED) {
79 runningState_ = RunningState::STOPPING;
80 syncCond_.notify_all();
81 syncCond_.wait(lock, [this] { return runningState_.load() == RunningState::STOPPED; });
82 if (loop_ != nullptr) {
83 if (loop_->joinable()) {
84 loop_->join();
85 }
86 loop_ = nullptr;
87 }
88 }
89 AVCODEC_LOGD("task %{public}s stop exited", name_.data());
90 }
91
StopAsync()92 void TaskThread::StopAsync()
93 {
94 AVCODEC_LOGD("task %{public}s StopAsync called", name_.data());
95 std::unique_lock lock(stateMutex_);
96 if (runningState_.load() != RunningState::STOPPING && runningState_.load() != RunningState::STOPPED) {
97 runningState_ = RunningState::STOPPING;
98 syncCond_.notify_all();
99 }
100 }
101
Pause()102 void TaskThread::Pause()
103 {
104 AVCODEC_LOGD("task %{public}s Pause called", name_.data());
105 std::unique_lock lock(stateMutex_);
106 switch (runningState_.load()) {
107 case RunningState::STARTED: {
108 runningState_ = RunningState::PAUSING;
109 syncCond_.wait(lock, [this] {
110 return runningState_.load() == RunningState::PAUSED || runningState_.load() == RunningState::STOPPED;
111 });
112 break;
113 }
114 case RunningState::STOPPING: {
115 syncCond_.wait(lock, [this] { return runningState_.load() == RunningState::STOPPED; });
116 break;
117 }
118 case RunningState::PAUSING: {
119 syncCond_.wait(lock, [this] { return runningState_.load() == RunningState::PAUSED; });
120 break;
121 }
122 default:
123 break;
124 }
125 AVCODEC_LOGD("task %{public}s Pause done.", name_.data());
126 }
127
PauseAsync()128 void TaskThread::PauseAsync()
129 {
130 AVCODEC_LOGD("task %{public}s PauseAsync called", name_.data());
131 std::unique_lock lock(stateMutex_);
132 if (runningState_.load() == RunningState::STARTED) {
133 runningState_ = RunningState::PAUSING;
134 }
135 }
136
RegisterHandler(std::function<void ()> handler)137 void TaskThread::RegisterHandler(std::function<void()> handler)
138 {
139 AVCODEC_LOGD("task %{public}s RegisterHandler called", name_.data());
140 handler_ = std::move(handler);
141 }
142
doTask()143 void TaskThread::doTask()
144 {
145 AVCODEC_LOGD("task %{public}s not override DoTask...", name_.data());
146 }
147
Run()148 void TaskThread::Run()
149 {
150 // The max length for a thread name is 16.
151 auto ret = pthread_setname_np(pthread_self(), name_.data());
152 if (ret != 0) {
153 AVCODEC_LOGE("task %{public}s set name failed", name_.data());
154 }
155 for (;;) {
156 AVCODEC_LOGD_LIMIT(LOGD_FREQUENCY, "task %{public}s is running on state : %{public}d",
157 name_.data(), runningState_.load());
158 if (runningState_.load() == RunningState::STARTED) {
159 handler_();
160 }
161 std::unique_lock lock(stateMutex_);
162 if (runningState_.load() == RunningState::PAUSING || runningState_.load() == RunningState::PAUSED) {
163 runningState_ = RunningState::PAUSED;
164 syncCond_.notify_all();
165 constexpr int timeoutMs = 500;
166 syncCond_.wait_for(lock, std::chrono::milliseconds(timeoutMs),
167 [this] { return runningState_.load() != RunningState::PAUSED; });
168 }
169 if (runningState_.load() == RunningState::STOPPING || runningState_.load() == RunningState::STOPPED) {
170 runningState_ = RunningState::STOPPED;
171 syncCond_.notify_all();
172 break;
173 }
174 }
175 }
176 } // namespace MediaAVCodec
177 } // namespace OHOS