Linux线程基本使用代码演示样例

Posted 2020-09-20 jzdwajue

#include <pthread.h>
#include <stdio.h>
#include <unistd.h>
void* thread_func(void* param)
{
    const char* p = (const char*)param;
    pid_t pid = 0;
    pthread_t tid = 0;

    pid = getpid();
    tid = pthread_self();
    printf("%s -> %8u %8u\n", p, (unsigned int)pid, (unsigned int)tid);
}
void* thread_wait_cancel(void* p)
{
    printf("thread wait cancel -> i‘m waitting for cancel\n");
    sleep(10000);
    printf("if u saw me, there got be something wrong\n");
}
int main(int argc, char* argv[])
{
    pthread_t tid = 0;
    pthread_create(&tid, NULL, thread_func, (void *)"sub  thread");
    
    pthread_t tid_cancel = 0;
    pthread_create(&tid_cancel, NULL, thread_wait_cancel, NULL);

    // wait thread tid to exit
    pthread_join(tid, NULL);
    
    // cancel a thread
    void* stat = 0;
    pthread_cancel(tid_cancel);
    pthread_join(tid_cancel, &stat);
    /* stat = -1 stand for PTHREAD_CANCELED */
    printf("cancel thread exit state : %d\n", stat);

    // show main thread infomation
    thread_func((void *)"main thread");
    return 0;
}

注意编译的时候须要加上选项-lpthread。由于pthread不是linu的默认库，例如以下所看到的：

gcc thr.c -lpthread