chromium/third_party/blink/common/privacy_budget/identifiability_study_settings.cc

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "third_party/blink/public/common/privacy_budget/identifiability_study_settings.h"

#include <initializer_list>
#include <optional>
#include <random>

#include "base/check.h"
#include "base/compiler_specific.h"
#include "base/no_destructor.h"
#include "base/synchronization/atomic_flag.h"
#include "base/threading/sequence_local_storage_slot.h"
#include "base/trace_event/common/trace_event_common.h"
#include "base/trace_event/trace_event.h"
#include "third_party/blink/public/common/privacy_budget/identifiability_study_settings_provider.h"
#include "third_party/blink/public/common/privacy_budget/identifiable_surface.h"

namespace blink {

namespace {

bool IdentifiabilityTracingEnabled() { … }

// IdentifiabilityStudySettings is meant to be used as a global singleton. Its
// use is subject to the following constraints.
//
//   1. The embedder should be able to set the
//      IdentifiabilityStudySettingsProvider at any point during execution. This
//      relaxation allows the embedder to perform any required initialization
//      without blocking process startup.
//
//   2. Get() and the returned IdentifiabilityStudySettings instance should be
//      usable from any thread. The returned object must always be well
//      formed with an infinite lifetime.
//
//   3. Calling Get() "prior" to the embedder calling SetProvider() should be
//      harmless and non-blocking.
//
//   4. Be fast.
class ThreadsafeSettingsWrapper { … };

}  // namespace

IdentifiabilityStudySettingsProvider::~IdentifiabilityStudySettingsProvider() =
    default;

IdentifiabilityStudySettings::IdentifiabilityStudySettings() = default;

IdentifiabilityStudySettings::IdentifiabilityStudySettings(
    std::unique_ptr<IdentifiabilityStudySettingsProvider> provider)
    : … { … }

IdentifiabilityStudySettings::~IdentifiabilityStudySettings() = default;

// static
const IdentifiabilityStudySettings* IdentifiabilityStudySettings::Get() { … }

// static
void IdentifiabilityStudySettings::SetGlobalProvider(
    std::unique_ptr<IdentifiabilityStudySettingsProvider> provider) { … }

void IdentifiabilityStudySettings::ResetStateForTesting() { … }

bool IdentifiabilityStudySettings::IsActive() const { … }

bool IdentifiabilityStudySettings::ShouldSampleWebFeature(
    mojom::WebFeature feature) const { … }

bool IdentifiabilityStudySettings::ShouldSampleSurface(
    IdentifiableSurface surface) const { … }

bool IdentifiabilityStudySettings::ShouldSampleType(
    IdentifiableSurface::Type type) const { … }

bool IdentifiabilityStudySettings::ShouldSampleAnyType(
    std::initializer_list<IdentifiableSurface::Type> types) const { … }

bool IdentifiabilityStudySettings::ShouldSampleAnything() const { … }

}  // namespace blink