1 /*
2 * Copyright (c) 2021 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 #include "thread_pool.h"
16 #include <cstring>
17 #include "script_utils.h"
18 #include <unistd.h>
19
20 namespace Uscript {
21 static thread_local float g_scriptProportion = 1.0f;
22 static ThreadPool* g_threadPool = nullptr;
23 static std::mutex g_initMutex;
24 static std::atomic<float> g_totalProportion(1.0f);
25
SetScriptProportion(float proportion)26 void SetScriptProportion(float proportion)
27 {
28 g_scriptProportion = proportion;
29 }
30
GetScriptProportion()31 float GetScriptProportion()
32 {
33 return g_scriptProportion;
34 }
35
SetTotalProportion(float proportion)36 void SetTotalProportion(float proportion)
37 {
38 g_totalProportion.store(proportion);
39 }
40
GetTotalProportion()41 float GetTotalProportion()
42 {
43 return g_totalProportion.load();
44 }
45
CreateThreadPool(int number)46 ThreadPool* ThreadPool::CreateThreadPool(int number)
47 {
48 std::lock_guard<std::mutex> lock(g_initMutex);
49 if (g_threadPool != nullptr) {
50 return g_threadPool;
51 }
52 g_threadPool = new ThreadPool();
53 g_threadPool->Init(number);
54 return g_threadPool;
55 }
56
Destroy()57 void ThreadPool::Destroy()
58 {
59 if (g_threadPool == nullptr) {
60 return;
61 }
62 std::lock_guard<std::mutex> lock(g_initMutex);
63 delete g_threadPool;
64 g_threadPool = nullptr;
65 }
66
Init(int32_t number)67 void ThreadPool::Init(int32_t number)
68 {
69 threadNumber_ = number;
70 taskQueue_.resize(threadPoolMaxTasks);
71 for (size_t t = 0; t < taskQueue_.size(); ++t) {
72 taskQueue_[t].available = true;
73 for (int32_t i = 0; i < threadNumber_; ++i) {
74 taskQueue_[t].subTaskFlag.emplace_back(new std::atomic_bool { false });
75 }
76 }
77 // Create workers
78 for (int32_t threadIndex = 0; threadIndex < threadNumber_; ++threadIndex) {
79 workers_.emplace_back(std::thread([this, threadIndex] {
80 ThreadExecute(this, threadIndex);
81 }));
82 }
83 }
84
ThreadRun(int32_t threadIndex)85 void ThreadPool::ThreadRun(int32_t threadIndex)
86 {
87 USCRIPT_LOGI("Create new thread successfully, tid: %d", gettid());
88 while (!stop_) {
89 for (int32_t k = 0; k < threadPoolMaxTasks; ++k) {
90 if (*taskQueue_[k].subTaskFlag[threadIndex]) {
91 taskQueue_[k].task.processor(threadIndex);
92 *taskQueue_[k].subTaskFlag[threadIndex] = false;
93 }
94 }
95 std::this_thread::sleep_for(std::chrono::milliseconds(50)); // 50ms
96 }
97 }
98
~ThreadPool()99 ThreadPool::~ThreadPool()
100 {
101 {
102 std::lock_guard<std::mutex> lock(queueMutex_);
103 stop_ = true;
104 }
105 for (auto& worker : workers_) {
106 worker.join();
107 }
108 for (auto& task : taskQueue_) {
109 for (auto c : task.subTaskFlag) {
110 delete c;
111 }
112 }
113 }
114
AddTask(Task && task)115 void ThreadPool::AddTask(Task &&task)
116 {
117 if (g_threadPool != nullptr) {
118 g_threadPool->AddNewTask(std::move(task));
119 }
120 }
121
AddNewTask(Task && task)122 void ThreadPool::AddNewTask(Task &&task)
123 {
124 int32_t index = AcquireWorkIndex();
125 if (index < 0) {
126 USCRIPT_LOGI("ThreadPool::AddNewTask Failed");
127 return;
128 }
129
130 RunTask(std::move(task), index);
131 // Works done. make this task available
132 std::lock_guard<std::mutex> lock(queueMutex_);
133 taskQueue_[index].available = true;
134 }
135
AcquireWorkIndex()136 int32_t ThreadPool::AcquireWorkIndex()
137 {
138 std::lock_guard<std::mutex> lock(queueMutex_);
139 for (int32_t i = 0; i < threadPoolMaxTasks; ++i) {
140 if (taskQueue_[i].available) {
141 taskQueue_[i].available = false;
142 return i;
143 }
144 }
145 return -1;
146 }
147
RunTask(Task && task,int32_t index)148 void ThreadPool::RunTask(Task &&task, int32_t index)
149 {
150 int32_t workSize = task.workSize;
151 taskQueue_[index].task = std::move(task);
152 // Mark each task should be executed
153 int32_t num = workSize > threadNumber_ ? threadNumber_ : workSize;
154 for (int32_t i = 0; i < num; ++i) {
155 *taskQueue_[index].subTaskFlag[i] = true;
156 }
157
158 bool complete = true;
159 do {
160 std::this_thread::sleep_for(std::chrono::milliseconds(50)); // 50ms
161 complete = true;
162 // 检查是否所有子任务执行结束
163 for (int32_t i = 0; i < num; ++i) {
164 if (*taskQueue_[index].subTaskFlag[i]) {
165 complete = false;
166 break;
167 }
168 }
169 } while (!complete);
170 }
171 } // namespace Uscript
172