* Copyright (c) 2021 Huawei Device Co., Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "thread_pool.h"
#include <cstring>
#include "script_utils.h"
#include <unistd.h>
namespace Uscript {
static thread_local float g_scriptProportion = 1.0f;
static ThreadPool* g_threadPool = nullptr;
static std::mutex g_initMutex;
static std::atomic<float> g_totalProportion(1.0f);
void SetScriptProportion(float proportion)
{
g_scriptProportion = proportion;
}
float GetScriptProportion()
{
return g_scriptProportion;
}
void SetTotalProportion(float proportion)
{
g_totalProportion.store(proportion);
}
float GetTotalProportion()
{
return g_totalProportion.load();
}
ThreadPool* ThreadPool::CreateThreadPool(int number)
{
std::lock_guard<std::mutex> lock(g_initMutex);
if (g_threadPool != nullptr) {
return g_threadPool;
}
g_threadPool = new ThreadPool();
g_threadPool->Init(number);
return g_threadPool;
}
void ThreadPool::Destroy()
{
if (g_threadPool == nullptr) {
return;
}
std::lock_guard<std::mutex> lock(g_initMutex);
delete g_threadPool;
g_threadPool = nullptr;
}
void ThreadPool::Init(int32_t number)
{
threadNumber_ = number;
taskQueue_.resize(threadPoolMaxTasks);
for (size_t t = 0; t < taskQueue_.size(); ++t) {
taskQueue_[t].available = true;
for (int32_t i = 0; i < threadNumber_; ++i) {
taskQueue_[t].subTaskFlag.emplace_back(new std::atomic_bool { false });
}
}
for (int32_t threadIndex = 0; threadIndex < threadNumber_; ++threadIndex) {
workers_.emplace_back(std::thread([this, threadIndex] {
ThreadExecute(this, threadIndex);
}));
}
}
void ThreadPool::ThreadRun(int32_t threadIndex)
{
USCRIPT_LOGI("Create new thread successfully, tid: %d", gettid());
while (!stop_) {
for (int32_t k = 0; k < threadPoolMaxTasks; ++k) {
if (*taskQueue_[k].subTaskFlag[threadIndex]) {
taskQueue_[k].task.processor(threadIndex);
*taskQueue_[k].subTaskFlag[threadIndex] = false;
}
}
std::this_thread::sleep_for(std::chrono::milliseconds(50));
}
}
ThreadPool::~ThreadPool()
{
{
std::lock_guard<std::mutex> lock(queueMutex_);
stop_ = true;
}
for (auto& worker : workers_) {
worker.join();
}
for (auto& task : taskQueue_) {
for (auto c : task.subTaskFlag) {
delete c;
}
}
}
void ThreadPool::AddTask(Task &&task)
{
if (g_threadPool != nullptr) {
g_threadPool->AddNewTask(std::move(task));
}
}
void ThreadPool::AddNewTask(Task &&task)
{
int32_t index = AcquireWorkIndex();
if (index < 0) {
USCRIPT_LOGI("ThreadPool::AddNewTask Failed");
return;
}
RunTask(std::move(task), index);
std::lock_guard<std::mutex> lock(queueMutex_);
taskQueue_[index].available = true;
}
int32_t ThreadPool::AcquireWorkIndex()
{
std::lock_guard<std::mutex> lock(queueMutex_);
for (int32_t i = 0; i < threadPoolMaxTasks; ++i) {
if (taskQueue_[i].available) {
taskQueue_[i].available = false;
return i;
}
}
return -1;
}
void ThreadPool::RunTask(Task &&task, int32_t index)
{
int32_t workSize = task.workSize;
taskQueue_[index].task = std::move(task);
int32_t num = workSize > threadNumber_ ? threadNumber_ : workSize;
for (int32_t i = 0; i < num; ++i) {
*taskQueue_[index].subTaskFlag[i] = true;
}
bool complete = true;
do {
std::this_thread::sleep_for(std::chrono::milliseconds(50));
complete = true;
for (int32_t i = 0; i < num; ++i) {
if (*taskQueue_[index].subTaskFlag[i]) {
complete = false;
break;
}
}
} while (!complete);
}
}
