Adding Blocks to Inactive Dispatch Queue - objective-c

Question

I have a situation where it would be helpful to be able to add blocks to an inactive queue which is then activated after another event happens. However, the entire thread from which I call dispatch_sync gets locked if the dispatch queue is suspended/inactive.
Is something like this possible? If not what other options do I have?
An example (not my actual use case):
#include <stdio.h>
#import <dispatch/dispatch.h>
int main(int argc, const char * argv[]) {
dispatch_queue_t my_queue = dispatch_queue_create("my_queue", DISPATCH_QUEUE_SERIAL_INACTIVE);
void (^b)(int) = ^void(int c) {
printf("%i\n", c);
};
for(int i = 1; i <= 1000; i++) {
dispatch_sync(my_queue, ^{ b(i); });
}
dispatch_activate(my_queue);
return 0;
}

Answer 1

I figured it out. Using dispatch_async fixed the problem.
Working solution:
#include <stdio.h>
#import <dispatch/dispatch.h>
int main(int argc, const char * argv[]) {
dispatch_queue_t my_queue = dispatch_queue_create("my_queue", DISPATCH_QUEUE_SERIAL_INACTIVE);
void (^b)(int) = ^void(int c) {
printf("%i\n", c);
};
for(int i = 1; i <= 1000; i++) {
dispatch_async(my_queue, ^{ b(i); });
}
dispatch_activate(my_queue);
return 0;
}