| // Copyright 2015 The Chromium Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style license that can be | |
| // found in the LICENSE file. | |
| #include "ui/events/base_event_utils.h" | |
| #include "base/atomic_sequence_num.h" | |
| #include "base/logging.h" | |
| namespace ui { | |
| base::StaticAtomicSequenceNumber g_next_event_id; | |
| uint32 GetNextTouchEventId() { | |
| // Set the first touch event ID to 1 because we set id to 0 for other types | |
| // of events. | |
| uint32 id = g_next_event_id.GetNext(); | |
| if (id == 0) | |
| id = g_next_event_id.GetNext(); | |
| DCHECK_NE(0U, id); | |
| return id; | |
| } | |
| } // namespace ui | |