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// Copyright 2013 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 "media/base/keyboard_event_counter.h"
#include "base/atomicops.h"
#include "base/logging.h"
namespace media {
KeyboardEventCounter::KeyboardEventCounter() : total_key_presses_(0) {}
KeyboardEventCounter::~KeyboardEventCounter() {}
void KeyboardEventCounter::Reset() {
pressed_keys_.clear();
base::subtle::NoBarrier_Store(
reinterpret_cast<base::subtle::AtomicWord*>(&total_key_presses_), 0);
}
void KeyboardEventCounter::OnKeyboardEvent(ui::EventType event,
ui::KeyboardCode key_code) {
// Updates the pressed keys and the total count of key presses.
if (event == ui::ET_KEY_PRESSED) {
if (pressed_keys_.find(key_code) != pressed_keys_.end())
return;
pressed_keys_.insert(key_code);
base::subtle::NoBarrier_AtomicIncrement(
reinterpret_cast<base::subtle::AtomicWord*>(&total_key_presses_), 1);
} else {
DCHECK_EQ(ui::ET_KEY_RELEASED, event);
pressed_keys_.erase(key_code);
}
}
size_t KeyboardEventCounter::GetKeyPressCount() const {
return base::subtle::NoBarrier_Load(
reinterpret_cast<const base::subtle::AtomicWord*>(&total_key_presses_));
}
} // namespace media
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