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