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#pragma once
#include <sys/cdefs.h>
__BEGIN_DECLS
#define POLLIN (1u << 0)
#define POLLPRI (1u << 2)
#define POLLOUT (1u << 3)
#define POLLERR (1u << 4)
#define POLLHUP (1u << 5)
#define POLLNVAL (1u << 6)
struct pollfd {
int fd;
short events;
short revents;
};
int poll(struct pollfd* fds, int nfds, int timeout);
__END_DECLS
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