Is the stack size of iPhone fixed?

Question

When I am trying to adjust of stack size of threads:

- (void)testStack:(NSInteger)n {
    NSThread *thread = [[NSThread alloc]initWithTarget:self selector:@s         


        

Answer 1

Actually you can set it. I am not sure if this changed with iOS 10, but on iOS 10.2.1 this does work. The only limitation is that the stack size has to be a multiple of 4kb.

pthread_attr_t tattr;
int ret = pthread_attr_init ( &tattr ) ;
size_t size;
ret = pthread_attr_getstacksize(&tattr, &size);
printf ( "Get: ret=%d,size=%zu\n" , ret , size ) ;

size = 4096 * 512 ;
ret = pthread_attr_setstacksize(&tattr, size);
int ret2 = pthread_attr_getstacksize(&tattr, &size);
printf ( "Set & Get: ret=%d ret2=%d,size=%zu\n" , ret , ret2 , size ) ;