bsd_poll.c

struct bsd_pollfd {
	int	fd;
	short	events;
	short	revents;
};

#define	BSD_POLLIN	0x0001

int bsd_poll(struct bsd_pollfd *fds, int nfds, int timeout) {
	result_t r;

	int32_t raw[] = {nfds, timeout};

	ipc_buffer_t fds_in = {
		.addr = fds,
		.size = sizeof(struct bsd_pollfd) * nfds,
		.type = 0x21
	};

	ipc_buffer_t fds_out = {
		.addr = fds,
		.size = sizeof(struct bsd_pollfd) * nfds,
		.type = 0x22
	};

	ipc_buffer_t *buffers[] = {
		&fds_in,
		&fds_out,
	};

	ipc_request_t rq = ipc_default_request;
	rq.request_id = 6;
	rq.raw_data = (uint32_t*)raw;
	rq.raw_data_size = sizeof(raw);
	rq.num_buffers = 2;
	rq.buffers = buffers;

	int32_t response[2]; // ret, errno
  
	ipc_response_fmt_t rs = ipc_default_response_fmt;
	rs.raw_data_size = sizeof(response);
	rs.raw_data = (uint32_t*) response;
  
	r = ipc_send(bsd_object, &rq, &rs);
	if(r) {
		bsd_result = r;
		return -1;
	}

	if(response[0] < 0) {
		bsd_result = LIBTRANSISTOR_ERR_BSD_ERRNO_SET;
		bsd_errno = response[1];
		return -1;
	}
  
	return response[0];
}