third_party/WebKit/Source/core/timing/WorkerGlobalScopePerformance.cpp

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#include "core/timing/WorkerGlobalScopePerformance.h"

#include "core/timing/WorkerPerformance.h"
#include "core/workers/WorkerGlobalScope.h"

namespace blink {

WorkerGlobalScopePerformance::WorkerGlobalScopePerformance(
    WorkerGlobalScope& worker_global_scope)
    : Supplement<WorkerGlobalScope>(worker_global_scope) {}

const char* WorkerGlobalScopePerformance::SupplementName() {
  return "WorkerGlobalScopePerformance";
}

WorkerGlobalScopePerformance& WorkerGlobalScopePerformance::From(
    WorkerGlobalScope& worker_global_scope) {
  WorkerGlobalScopePerformance* supplement =
      static_cast<WorkerGlobalScopePerformance*>(
          Supplement<WorkerGlobalScope>::From(worker_global_scope,
                                              SupplementName()));
  if (!supplement) {
    supplement = new WorkerGlobalScopePerformance(worker_global_scope);
    ProvideTo(worker_global_scope, SupplementName(), supplement);
  }
  return *supplement;
}

WorkerPerformance* WorkerGlobalScopePerformance::performance(
    WorkerGlobalScope& worker_global_scope) {
  return From(worker_global_scope).performance(&worker_global_scope);
}

WorkerPerformance* WorkerGlobalScopePerformance::performance(
    WorkerGlobalScope* worker_global_scope) {
  if (!performance_)
    performance_ = WorkerPerformance::Create(worker_global_scope);
  return performance_.Get();
}

void WorkerGlobalScopePerformance::Trace(blink::Visitor* visitor) {
  visitor->Trace(performance_);
  Supplement<WorkerGlobalScope>::Trace(visitor);
}

}  // namespace blink