int fd_pipe_get_param(struct fd_pipe *pipe, enum fd_param_id param,
uint64_t *value);
int fd_pipe_wait(struct fd_pipe *pipe, uint32_t timestamp);
+/* timeout in nanosec */
+int fd_pipe_wait_timeout(struct fd_pipe *pipe, uint32_t timestamp,
+ uint64_t timeout);
/* buffer-object functions: