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| author | Peter Hutterer <peter.hutterer@who-t.net> | 2013-07-02 10:50:37 +1000 |
|---|---|---|
| committer | Peter Hutterer <peter.hutterer@who-t.net> | 2013-07-02 14:02:55 +1000 |
| commit | c661e80ba0f20ea8b71fcc0aa02840c52314710a (patch) | |
| tree | 9a90416818ec37d21fcc44c505b105c5c1fc5a48 /libevdev/libevdev-int.h | |
| parent | f3a6b0c6854a59f4433217f279f76383687d0c3b (diff) | |
| download | libevdev-c661e80ba0f20ea8b71fcc0aa02840c52314710a.tar.gz | |
Switch to a state machine to handle incomplete syncs
A caller may start syncing but switch back to normal half-way through the
sync. In that case, we need to drop all sync events and continue with
regular events only.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Diffstat (limited to 'libevdev/libevdev-int.h')
| -rw-r--r-- | libevdev/libevdev-int.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/libevdev/libevdev-int.h b/libevdev/libevdev-int.h index 1a4f224..34f8e05 100644 --- a/libevdev/libevdev-int.h +++ b/libevdev/libevdev-int.h @@ -51,6 +51,23 @@ _a > _b ? _a : _b; \ }) +/** + * Sync state machine: + * default state: SYNC_NONE + * + * SYNC_NONE → SYN_DROPPED or forced sync → SYNC_NEEDED + * SYNC_NEEDED → libevdev_next_event(LIBEVDEV_READ_SYNC) → SYNC_IN_PROGRESS + * SYNC_NEEDED → libevdev_next_event(LIBEVDEV_READ_SYNC_NONE) → SYNC_NONE + * SYNC_IN_PROGRESS → libevdev_next_event(LIBEVDEV_READ_SYNC_NONE) → SYNC_NONE + * SYNC_IN_PROGRESS → no sync events left → SYNC_NONE + * + */ +enum SyncState { + SYNC_NONE, + SYNC_NEEDED, + SYNC_IN_PROGRESS, +}; + struct libevdev { int fd; libevdev_log_func_t log; @@ -78,7 +95,7 @@ struct libevdev { int current_slot; int rep_values[2]; - int need_sync; + enum SyncState sync_state; int grabbed; struct input_event *queue; |