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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/user_prefs/user_prefs.h"
#include "base/check.h"
#include "base/memory/ptr_util.h"
#include "base/memory/singleton.h"
#include "components/prefs/pref_service.h"
namespace user_prefs {
namespace {
void* UserDataKey() {
// We just need a unique constant. Use the address of a static that
// COMDAT folding won't touch in an optimizing linker.
static int data_key = 0;
return reinterpret_cast<void*>(&data_key);
}
} // namespace
// static
bool UserPrefs::IsInitialized(base::SupportsUserData* context) {
CHECK(context);
return context->GetUserData(UserDataKey()) != nullptr;
}
// static
PrefService* UserPrefs::Get(base::SupportsUserData* context) {
DCHECK(context);
DCHECK(IsInitialized(context));
return static_cast<UserPrefs*>(
context->GetUserData(UserDataKey()))->prefs_;
}
// static
void UserPrefs::Set(base::SupportsUserData* context, PrefService* prefs) {
DCHECK(context);
DCHECK(prefs);
DCHECK(!context->GetUserData(UserDataKey()));
context->SetUserData(UserDataKey(), base::WrapUnique(new UserPrefs(prefs)));
}
UserPrefs::UserPrefs(PrefService* prefs) : prefs_(prefs) {
}
UserPrefs::~UserPrefs() {
}
} // namespace user_prefs
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