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write EV_SYN input_event along with led events to device

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Other clients of an evdev device need to have the events they receive
be separated, in moment in time, from other events by an EV_SYN/
SYN_REPORT. This is the responsibility of the client who writes events
into the stream.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
This commit is contained in:
polyphemus 2013-08-09 17:38:51 +02:00 • committed by Peter Hutterer
parent 4d4293a65b
commit f29e4118fc
1 changed files with 5 additions and 1 deletions
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6
libevdev/libevdev.c
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@ -1189,7 +1189,7 @@ libevdev_kernel_set_led_value(struct libevdev *dev, unsigned int code, enum Evde
int
libevdev_kernel_set_led_values(struct libevdev *dev, ...)
{
struct input_event ev[LED_MAX];
struct input_event ev[LED_MAX + 1];
enum EvdevLEDValues val;
va_list args;
int code;
@ -1228,8 +1228,12 @@ libevdev_kernel_set_led_values(struct libevdev *dev, ...)
va_end(args);
if (rc == 0 && nleds > 0) {
ev[nleds].type = EV_SYN;
ev[nleds++].code = SYN_REPORT;
rc = write(libevdev_get_fd(dev), ev, nleds * sizeof(ev[0]));
if (rc > 0) {
nleds--; /* last is EV_SYN */
while (nleds--)
update_led_state(dev, &ev[nleds]);
}