在这里,我有一个struct
Ç - 错误,同时通过结构线程
struct dotData{
long x;
long y;
};
其中我试图通过多个threads
void *find_z(void *thisdot)
{
long z;
struct dotData *data;
*data = *((struct dotData*)(thisdot));
z = data.x + data.y;
printf("Here's our dot! %ld * %ld = %ld \n", data.x, data.y, z);
pthread_exit(NULL);
}
从main()
,我创建一个结构thisdot
,这是传递作为参数find_z
每次其元素x
和y
发生变化时
int main()
{
.
.
.
struct dotData thisdot;
int NUM_THREADS;
NUM_THREADS = N*M;
pthread_t threads[NUM_THREADS];
int i, j;
for(i = 0; i < M; i++){
for (j = 0; j < N; j++) {
thisdot.x = x_dotBegin + x_interval*j;
thisdot.y = y_dotBegin + y_interval*i;
pthread_create(&threads[NUM_THREADS], NULL, find_z, &thisdot);
}
}
pthread_exit(NULL);
}
然而,在编译过程中我得到了z = data.x + data.y;
error: request for member ‘x’ in something not a structure or union|
error: request for member ‘y’ in something not a structure or union|
错误如何正确地传递这个结构给线程?
'数据 - > x'和'数据 - > y'但是你不确定与'*数据= ...' –
编译器会告诉你问题是什么行为。数据不是一个结构而不是一个联盟。数据是一个指针。像指针一样处理它。 – Gerhardh