1/*
2 * Copyright (c) 2014, Opera Software ASA. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 * 3. Neither the name of Opera Software ASA nor the names of its
13 *    contributors may be used to endorse or promote products derived
14 *    from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
19 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
20 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
27 * OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include "config.h"
31#include "modules/performance/SharedWorkerPerformance.h"
32
33#include "core/dom/Document.h"
34#include "core/dom/ExecutionContext.h"
35#include "core/loader/DocumentLoadTiming.h"
36#include "core/loader/DocumentLoader.h"
37#include "core/workers/SharedWorker.h"
38
39namespace blink {
40
41SharedWorkerPerformance::SharedWorkerPerformance()
42    : m_timeOrigin(monotonicallyIncreasingTime())
43{
44}
45
46const char* SharedWorkerPerformance::supplementName()
47{
48    return "SharedWorkerPerformance";
49}
50
51SharedWorkerPerformance& SharedWorkerPerformance::from(SharedWorker& sharedWorker)
52{
53    SharedWorkerPerformance* supplement = static_cast<SharedWorkerPerformance*>(WillBeHeapSupplement<SharedWorker>::from(sharedWorker, supplementName()));
54    if (!supplement) {
55        supplement = new SharedWorkerPerformance();
56        provideTo(sharedWorker, supplementName(), adoptPtrWillBeNoop(supplement));
57    }
58    return *supplement;
59}
60
61double SharedWorkerPerformance::workerStart(ExecutionContext* context, SharedWorker& sharedWorker)
62{
63    return SharedWorkerPerformance::from(sharedWorker).getWorkerStart(context, sharedWorker);
64}
65
66double SharedWorkerPerformance::getWorkerStart(ExecutionContext* context, SharedWorker&) const
67{
68    ASSERT(context);
69    ASSERT(context->isDocument());
70    Document* document = toDocument(context);
71    if (!document->loader())
72        return 0;
73
74    double navigationStart = document->loader()->timing()->navigationStart();
75    return m_timeOrigin - navigationStart;
76}
77
78} // namespace blink
79
80