// license that can be found in the LICENSE file.

package syscall

const (
	EPOLLIN       = 0x1
	EPOLLOUT      = 0x4
	EPOLLERR      = 0x8
	EPOLLHUP      = 0x10
	EPOLLRDHUP    = 0x2000
	EPOLLET       = 0x80000000
	EPOLL_CLOEXEC = 0x80000
	EPOLL_CTL_ADD = 0x1
	EPOLL_CTL_DEL = 0x2
	EPOLL_CTL_MOD = 0x3
	EFD_CLOEXEC   = 0x80000

	return fd == uintptr(epfd) || fd == netpollEventFd
}

func netpollopen(fd uintptr, pd *pollDesc) uintptr {
	var ev syscall.EpollEvent
	ev.Events = syscall.EPOLLIN | syscall.EPOLLOUT | syscall.EPOLLRDHUP | syscall.EPOLLET
	tp := taggedPointerPack(unsafe.Pointer(pd), pd.fdseq.Load())
	*(*taggedPointer)(unsafe.Pointer(&ev.Data)) = tp
	return syscall.EpollCtl(epfd, syscall.EPOLL_CTL_ADD, int32(fd), &ev)
}