Update the progress bar (if userui is displaying one), and possbly display
some text in the bar itself (eg a/b MB written).
Signed-off-by: Nigel Cunningham <[email protected]>
kernel/power/ui.c | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 73 insertions(+), 0 deletions(-)
diff --git a/kernel/power/ui.c b/kernel/power/ui.c
index 2f779a5..b01c89b 100644
--- a/kernel/power/ui.c
+++ b/kernel/power/ui.c
@@ -210,3 +210,76 @@ static unsigned long userui_memory_neede
return (128 * PAGE_SIZE);
}
+/* suspend_update_status
+ *
+ * Description: Update the progress bar and (if on) in-bar message.
+ * Arguments: UL value, maximum: Current progress percentage (value/max).
+ * const char *fmt, ...: Message to be displayed in the middle
+ * of the progress bar.
+ * Note that a NULL message does not mean that any previous
+ * message is erased! For that, you need suspend_prepare_status with
+ * clearbar on.
+ * Returns: Unsigned long: The next value where status needs to be updated.
+ * This is to reduce unnecessary calls to update_status.
+ */
+unsigned long suspend_update_status(unsigned long value, unsigned long maximum,
+ const char *fmt, ...)
+{
+ static int last_step = -1;
+ struct userui_msg_params msg;
+ int bitshift;
+ int this_step;
+ unsigned long next_update;
+
+ if (ui_helper_data.pid == -1)
+ return 0;
+
+ if ((!maximum) || (!progress_granularity))
+ return maximum;
+
+ if (value < 0)
+ value = 0;
+
+ if (value > maximum)
+ value = maximum;
+
+ /* Try to avoid math problems - we can't do 64 bit math here
+ * (and shouldn't need it - anyone got screen resolution
+ * of 65536 pixels or more?) */
+ bitshift = fls(maximum) - 16;
+ if (bitshift > 0) {
+ unsigned long temp_maximum = maximum >> bitshift;
+ unsigned long temp_value = value >> bitshift;
+ this_step = (int)
+ (temp_value * progress_granularity / temp_maximum);
+ next_update = (((this_step + 1) * temp_maximum /
+ progress_granularity) + 1) << bitshift;
+ } else {
+ this_step = (int) (value * progress_granularity / maximum);
+ next_update = ((this_step + 1) * maximum /
+ progress_granularity) + 1;
+ }
+
+ if (this_step == last_step)
+ return next_update;
+
+ memset(&msg, 0, sizeof(msg));
+
+ msg.a = this_step;
+ msg.b = progress_granularity;
+
+ if (fmt) {
+ va_list args;
+ va_start(args, fmt);
+ vsnprintf(msg.text, sizeof(msg.text), fmt, args);
+ va_end(args);
+ msg.text[sizeof(msg.text)-1] = '\0';
+ }
+
+ suspend_send_netlink_message(&ui_helper_data, USERUI_MSG_PROGRESS,
+ &msg, sizeof(msg));
+ last_step = this_step;
+
+ return next_update;
+}
+
--
Nigel Cunningham nigel at suspend2 dot net
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