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Hook up event processing to libevdev

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This gives us the ability to handle SYN_DROPPED transparently to the caller.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Jonas Ådahl <jadahl@gmail.com>
This commit is contained in:
Peter Hutterer 2013-12-06 13:09:18 +10:00
parent f925cee8df
commit 0fea6226f1
1 changed files with 58 additions and 31 deletions
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89
src/evdev.c
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@ -29,7 +29,7 @@
#include <linux/input.h>
#include <unistd.h>
#include <fcntl.h>
#include <mtdev.h>
#include <mtdev-plumbing.h>
#include <assert.h>
#include "libinput.h"
@ -438,56 +438,83 @@ fallback_dispatch_create(void)
return dispatch;
}
static void
evdev_process_events(struct evdev_device *device,
struct input_event *ev, int count)
static inline void
evdev_process_event(struct evdev_device *device, struct input_event *e)
{
struct evdev_dispatch *dispatch = device->dispatch;
struct input_event *e, *end;
uint32_t time = 0;
uint32_t time = e->time.tv_sec * 1000 + e->time.tv_usec / 1000;
e = ev;
end = e + count;
for (e = ev; e < end; e++) {
time = e->time.tv_sec * 1000 + e->time.tv_usec / 1000;
dispatch->interface->process(dispatch, device, e, time);
}
dispatch->interface->process(dispatch, device, e, time);
static inline void
evdev_device_dispatch_one(struct evdev_device *device,
struct input_event *ev)
{
if (!device->mtdev) {
evdev_process_event(device, ev);
} else {
mtdev_put_event(device->mtdev, ev);
if (libevdev_event_is_code(ev, EV_SYN, SYN_REPORT)) {
while (!mtdev_empty(device->mtdev)) {
struct input_event e;
mtdev_get_event(device->mtdev, &e);
evdev_process_event(device, &e);
}
}
}
}
static int
evdev_sync_device(struct evdev_device *device)
{
struct input_event ev;
int rc;
do {
rc = libevdev_next_event(device->evdev,
LIBEVDEV_READ_FLAG_SYNC, &ev);
if (rc < 0)
break;
evdev_device_dispatch_one(device, &ev);
} while (rc == LIBEVDEV_READ_STATUS_SYNC);
return rc == -EAGAIN ? 0 : rc;
}
static void
evdev_device_dispatch(void *data)
{
struct evdev_device *device = data;
struct libinput *libinput = device->base.seat->libinput;
int fd = device->fd;
struct input_event ev[32];
int len;
struct input_event ev;
int rc;
/* If the compositor is repainting, this function is called only once
* per frame and we have to process all the events available on the
* fd, otherwise there will be input lag. */
do {
if (device->mtdev)
len = mtdev_get(device->mtdev, fd, ev,
ARRAY_LENGTH(ev)) *
sizeof (struct input_event);
else
len = read(fd, &ev, sizeof ev);
rc = libevdev_next_event(device->evdev,
LIBEVDEV_READ_FLAG_NORMAL, &ev);
if (rc == LIBEVDEV_READ_STATUS_SYNC) {
/* send one more sync event so we handle all
currently pending events before we sync up
to the current state */
ev.code = SYN_REPORT;
evdev_device_dispatch_one(device, &ev);
if (len < 0 || len % sizeof ev[0] != 0) {
if (len < 0 && errno != EAGAIN && errno != EINTR) {
libinput_remove_source(libinput,
device->source);
device->source = NULL;
}
return;
rc = evdev_sync_device(device);
if (rc == 0)
rc = LIBEVDEV_READ_STATUS_SUCCESS;
} else if (rc == LIBEVDEV_READ_STATUS_SUCCESS) {
evdev_device_dispatch_one(device, &ev);
}
} while (rc == LIBEVDEV_READ_STATUS_SUCCESS);
evdev_process_events(device, ev, len / sizeof ev[0]);
} while (len > 0);
if (rc != -EAGAIN && rc != -EINTR) {
libinput_remove_source(libinput, device->source);
device->source = NULL;
}
}
static int