src/third_party/WebKit/Source/modules/performance/SharedWorkerPerformance.cpp

   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
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  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
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  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
  39 namespace blink {
  40
  41 SharedWorkerPerformance::SharedWorkerPerformance()
  42     : m_timeOrigin(monotonicallyIncreasingTime())
  43 {
  44 }
  45
  46 const char* SharedWorkerPerformance::supplementName()
  47 {
  48     return "SharedWorkerPerformance";
  49 }
  50
  51 SharedWorkerPerformance& 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
  61 double SharedWorkerPerformance::workerStart(ExecutionContext* context, SharedWorker& sharedWorker)
  62 {
  63     return SharedWorkerPerformance::from(sharedWorker).getWorkerStart(context, sharedWorker);
  64 }
  65
  66 double 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