Sperrfreie Aufgaben-Synchronisation mittels C11 Atomic Flag Primitiven

#include <stdatomic.h>
#include <stdbool.h>
 
typedef struct {
    atomic_flag flag;
    int payload;
} ConcurrentBuffer;
 
void buffer_init(ConcurrentBuffer *cb) {
    atomic_flag_clear(&cb->flag);
    cb->payload = 0;
}
 
bool try_acquire_and_write(ConcurrentBuffer *cb, int data) {
    if (!atomic_flag_test_and_set_explicit(&cb->flag, memory_order_acquire)) {
        cb->payload = data;
        atomic_flag_clear_explicit(&cb->flag, memory_order_release);
        return true;
    }
    return false;
}