+/**
+ * GPollFunc:
+ * @ufds: an array of #GPollFD elements
+ * @nfsd: the number of elements in @ufds
+ * @timeout_: the maximum time to wait for an event of the file descriptors.
+ * A negative value indicates an infinite timeout.
+ *
+ * Specifies the type of function passed to g_main_context_set_poll_func().
+ * The semantics of the function should match those of the poll() system call.
+ *
+ * Returns: the number of #GPollFD elements which have events or errors
+ * reported, or -1 if an error occurred.
+ */
+typedef gint (*GPollFunc) (GPollFD *ufds,
+ guint nfsd,
+ gint timeout_);
+
+/**
+ * GPollFD:
+ * @fd: the file descriptor to poll (or a HANDLE on Win32)
+ * @events: a bitwise combination from #GIOCondition, specifying which
+ * events should be polled for. Typically for reading from a file
+ * descriptor you would use %G_IO_IN | %G_IO_HUP | %G_IO_ERR, and
+ * for writing you would use %G_IO_OUT | %G_IO_ERR.
+ * @revents: a bitwise combination of flags from #GIOCondition, returned
+ * from the poll() function to indicate which events occurred.
+ *
+ * Represents a file descriptor, which events to poll for, and which events
+ * occurred.
+ */