[英]C - Waiting For Multiple Threads to Terminate
I am trying to wait for all the threads to terminate before the main() process terminates. 我试图等待所有线程在main()进程终止之前终止。 Here is what I have so far:
这是我到目前为止的内容:
void* mapperFunction()
{
printf("Hello\n");
return NULL;
}
int main()
{
int i; // Used in "for" loops.
int N = 3;
pthread_t* mapperThreads = (pthread_t*) malloc(sizeof(pthread_t) * N);
for ( i = 0; i < N; i++)
{ // Creates all the mapper threads.
pthread_create( &mapperThreads[N], NULL, mapperFunction, NULL);
}
for ( i = 0; i < N; i++)
{ // Waits for all the mapper threads to terminate.
pthread_join( mapperThreads[N],NULL);
}
return 0;
}
I get three different outputs when I run this code; 运行此代码时,我得到三个不同的输出。
1- Hello\\n 1-您好\\ n
2- Helle\\nHello\\n 2- Helle \\ n您好\\ n
3- Hello\\nHello\\nHello\\n 3-您好\\ n您好\\ n您好\\ n
It looks like the main() process does not always wait for all threads to terminate. 看起来main()进程并不总是等待所有线程终止。 What am I doing wrong?
我究竟做错了什么?
在每种情况下,您都希望使用&mapperThreads[i]
而不是&mapperThreads[N]
。
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