Linux并行计算多线程入门程序（POSIX线程并行）

Posted 2021-07-23 各可

Linux并行计算多线程

#include"stdio.h"
#include"stdlib.h"
#include<pthread.h>
#define NUM_THREADS 4
long int thread_count;
void * Hello(void * rank);
int main(int argc, char *argv[])
{
    long int thread;
    pthread_t * thread_handles;
    thread_count = NUM_THREADS;
    thread_handles = (pthread_t *)malloc(thread_count * sizeof(pthread_t));
    for(thread=0;thread<thread_count;thread++)
        pthread_create(&thread_handles[thread],NULL,Hello,(void *)thread);
    printf("Hello from the main thread\\n");
    for (thread = 0;thread<thread_count;thread++)
        pthread_join(thread_handles[thread], NULL);
    free(thread_handles);
    return 0;
}
void * Hello(void * rank)
{
    long int my_rank=(long int)rank;
    printf("Hello from thread %ld of %ld\\n",my_rank,thread_count);
    return NULL;
}
// gcc thread.c -o thread -lpthread
// ./pthread

在Linux系统中端该.c文件所在文件夹下打开终端，输入以下命令进行编译运行：

运行结果如下：