我试图在main()进程终止之前等待所有线程终止。以下是我到目前为止的情况:
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;
}
运行此代码时,我得到三个不同的输出;
1- Hello \ n
2- Helle \ nHello \ n
3-你好\ nHello \ nHello \ n
看起来main()进程并不总是等待所有线程终止。我做错了什么?
答案 0 :(得分:1)
在每种情况下,您都希望&mapperThreads[i]
代替&mapperThreads[N]
。
答案 1 :(得分:0)
也许pthread_barrier_wait
是您正在寻找的?