static int
calculate_poll_result(connection_t *conn, int poll_result)
{
if (poll_result == 0) {
return TIMEOUT_EXN;
}
else if (poll_result < 0 && errno != EINTR) {
return read_exception_status(conn, errno);
}
}
static int
std_read(connection_t *conn, char *buf, int len, int timeout)
{
int fd;
int result;
int retry = 3;
int poll_result;
int poll_timeout;
if (! conn) {
return -1;
}
fd = conn->fd;
if (fd <= 0 || conn->is_read_shutdown) {
return -1;
}
if (timeout >= 0) {
poll_timeout = timeout;
}
else {
poll_timeout = conn->socket_timeout;
}
if (conn->is_recv_timeout) {
if (conn->recv_timeout != poll_timeout) {
conn->recv_timeout = poll_timeout;
resin_tcp_set_recv_timeout(conn, poll_timeout);
}
}
else {
poll_result = poll_read(fd, poll_timeout);
if (poll_result <= 0) {
return calculate_poll_result(conn, poll_result);
}
}
do {
/* recv returns 0 on end of file */
result = recv(fd, buf, len, 0);
// fprintf(stderr, "rcv %d\n", result);
if (result > 0) {
return result;
}
else if (result == 0) {
/* recv returns 0 on end of file */
return -1;
}
if (errno == EINTR) {
/* EAGAIN is returned by a timeout */
poll_result = poll_read(fd, conn->socket_timeout);
if (poll_result <= 0) {
return calculate_poll_result(conn, poll_result);
}
}
else {
return read_exception_status(conn, errno);
}
} while (retry-- >= 0);
if (result > 0) {
return result;
}
else if (result == 0) {
return -1;
}
else {
return read_exception_status(conn, errno);
}
}
