传递参数给线程

来源：互联网发布：阿塞拜疆知乎编辑：程序博客网时间：2024/04/20 06:22

在demo1的基础上，添加了传递参数给线程。这样可以更明显地看到，进程依次创建了线程，但是线程的执行顺序却是不固定的。

#include <stdio.h>#include <pthread.h>void *fn(void *arg){printf("thread #%u : get arg=<%d>, my PID=%d\n", \(unsigned int)pthread_self(), (int)arg, getpid());return NULL;}int main(int argc, char *argv[]){pthread_t tid;int error;int i;for(i=0; i<10; i++){error = pthread_create( &tid, NULL, fn, (void*)i);if(0 != error){perror("pthead_create error");return -1;}else{printf("main: my PID=%d, set arg=<%d>, create thread #%u OK!\n", \getpid(), i, (unsigned int)tid);}}sleep(3); /* give threads time to print out */return 0;}

附执行结果：

main: my PID=3379, set arg=<0>, create thread #3075865408 OK!
main: my PID=3379, set arg=<1>, create thread #3067472704 OK!
main: my PID=3379, set arg=<2>, create thread #3059080000 OK!
main: my PID=3379, set arg=<3>, create thread #3050687296 OK!
main: my PID=3379, set arg=<4>, create thread #3042294592 OK!
main: my PID=3379, set arg=<5>, create thread #3033901888 OK!
main: my PID=3379, set arg=<6>, create thread #3025509184 OK!
main: my PID=3379, set arg=<7>, create thread #3017116480 OK!
main: my PID=3379, set arg=<8>, create thread #3008723776 OK!
main: my PID=3379, set arg=<9>, create thread #3000331072 OK!
thread #3025509184 : get arg=<6>, my PID=3379
thread #3033901888 : get arg=<5>, my PID=3379
thread #3042294592 : get arg=<4>, my PID=3379
thread #3017116480 : get arg=<7>, my PID=3379
thread #3050687296 : get arg=<3>, my PID=3379
thread #3008723776 : get arg=<8>, my PID=3379
thread #3059080000 : get arg=<2>, my PID=3379
thread #3000331072 : get arg=<9>, my PID=3379
thread #3075865408 : get arg=<0>, my PID=3379
thread #3067472704 : get arg=<1>, my PID=3379

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