main.cpp

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//
//  main.cpp
//  多线程
//
//  Created by 赵明明 on 2023/6/13.
//
#include "FillPology.hpp"
#include "测试.hpp"
#include <iostream>
#include <pthread.h>
#include <sys/time.h>
#include <chrono>
#include <thread>
 
using namespace std;
 
#define NUM_THREADS 1
/*struct timeval{
    long tv_sec;
    long tv_usec;
};*/
矩阵* img=new 矩阵(301,301,(float)0);
 
void* say_hello(void* args)
{
    int tid = *((int*)args);
    //std::cout <<"Hello Runoob! 线程 ID为: "<< tid << std::endl;
    std::cout<<tid<<endl;
    //test_FillPology();
    //test_DrawPlane(img);
    //pthread_exit(NULL);
    return 0;
}
int test_multi_thread(void){
    // insert code here...
    //clock_t start=clock();
    struct timeval t1,t2;
    gettimeofday(&t1,NULL);
    pthread_t tids[NUM_THREADS];
    int indexes[NUM_THREADS];
    int i;
    for(i=0;i<NUM_THREADS; i++){
        //cout <<"main():创建线程，"<<i<<endl;
        
        indexes[i]=i;
        int ret=pthread_create(&tids[i],NULL,say_hello,&indexes[i]);
        if(ret!=0){
            cout<<"无法创建线程,"<<ret<<endl;
            exit(-1);
        }
        
    }
    
    
    //pthread_exit(NULL);
    //clock_t end=clock();
    gettimeofday(&t2,NULL);
    double duration = (t2.tv_sec - t1.tv_sec) + (double)(t2.tv_usec-t1.tv_usec)/1000000.0;
    //cout<<"multi_thread_donw:"<<duration<<"s"<<endl;;
    pthread_exit(NULL);
    //cout<<"multi_thread_donw:"<<((double)(end-start)/CLOCKS_PER_SEC)<<"s"<<endl;;
    return 0;
}
 
// 一个虚拟函数
void foo(int Z)
{
    for (int i = 0; i < Z; i++) {
        cout <<i<< "线程使用函数指针作为可调用参数\n";
    }
}
void test_thread_object(void){
    /*
    thread th1(foo,2);
    cout<<th1.hardware_concurrency()<<endl;
    cout<<"\n";
    cout<<th1.native_handle()<<endl;
    //th1.join();
    */
    struct timeval t1,t2;
    gettimeofday(&t1,NULL);
    thread threads[NUM_THREADS];
    for(int i=0;i<NUM_THREADS;++i){
        threads[i] = thread(test_DrawPlane,img);
    }
    for(auto &thread:threads)
        thread.join();
    gettimeofday(&t2,NULL);
    double duration = (t2.tv_sec - t1.tv_sec) + (double)(t2.tv_usec-t1.tv_usec)/1000000.0;
    
    cout<<"All threads joined!,timecost:"<<duration <<" s"<<endl;;
}
 
 
int main(int argc, const char * argv[]) {
    //test_DrawPlane();
    //test_FillPology();
    //test_单位化();
    //test_和();
    //test_minmax();
    //test_线();
    //test_add_sub();
    
    //test_矩阵();
    /*test_c_();
    test_r_();
    */
    //test_子矩阵();
    
    //test_multi_thread();
    test_thread_object();
    
    int numbers[5];
    std::cout<< "Enter five integers: ";
    for(int i =0;i<5;i++){
        std::cin >> numbers[i];
    }
    std::sort(numbers,numbers+5);
    int max=numbers[4];
    int min=numbers[0];
    std::cout<<"the maximum is :"<<max<<",minimum is :"<<min<<endl;
    return 0;
     
}