std :: atomic <uint64_t> vs sig_atomic_t

Question

我可以在处理程序代码中使用std::atomic<uint64_t>代替sig_atomic_t吗？

我的原始代码如下，我想升级32位sig_atomic_t计数器，以便处理超过596小时毫秒精度的时间段。

volatile static sig_atomic_t ms_long_counter;

static void MonotonicMsHandler(int sig, siginfo_t *si, void *uc) {
  ms_long_counter += (1 + si->si_overrun);
}


///... Setup
struct sigaction sa;
sa.sa_flags = SA_RESTART | SA_SIGINFO;

sa.sa_sigaction = &MonotonicMsHandler;
sigemptyset(&sa.sa_mask);
sigaction(SIGRTMIN, &sa, NULL);

struct sigevent sev;
sev.sigev_notify = SIGEV_SIGNAL;
sev.sigev_signo = SIGRTMIN;

timer_create(CLOCK_MONOTONIC, &sev, &millis_timer);

struct itimerspec its;
its.it_value.tv_sec = 0;
its.it_value.tv_nsec = 1000000;  // The first expiration in 1ms.   
its.it_interval.tv_sec = its.it_value.tv_sec;
its.it_interval.tv_nsec = its.it_value.tv_nsec;    
timer_settime(millis_timer, 0, &its, NULL);