The futex facility returned an unexpected error code. The reasons for the error are not clear.

I am writing a C program using <pthread.h> .

pthreadobjects - the structure passed to the thread.

 int main{ ... Pthreadobjects = (pthreadobject *)malloc(allthreads * sizeof(pthreadobject)); pthread_barrier_init(&globalblock, NULL, allthreads + 1); //инициализировали //экземпляр барьера Pthreadobjects[i].globalblock = &globalblock; // передали структуре указатель pthread_create(Pthreads + i, NULL, &pthreadfunc, Pthreadobjects + i); pthread_barrier_wait(&globalblock); //ждём выполнения нитей ... } void * pthreadfunc(void * elem){ //функция для нити pthreadobject * PTHO = elem; pthread_barrier_wait(PTHO -> globalblock); return 0; } 

When you start the program gives a certain answer, finishes the calculations, but sometimes the following error occurs:

The futex facility returned an unexpected error code.

What am I doing wrong?