blob: 9e34cf0b5fa550a90bb1b888ad052c9f6935774c [file] [log] [blame]
// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <lib/fit/defer.h>
#include <lib/fit/function.h>
#include <lib/zx/time.h>
#include <string>
#include "src/ledger/bin/storage/public/types.h"
namespace ledger {
// A token that performs a given action on destruction.
using ExpiringToken = fit::deferred_action<fit::closure>;
// The result of a predicate, meant to be checked on a closed page. The result
// is |YES| or |NO| depending on whether the predicate is satisfied or not. If
// however the page was opened during the operation, |PAGE_OPENED| is returned.
enum class PagePredicateResult { YES, NO, PAGE_OPENED };
// Holds information on when a page was last used.
struct PageInfo {
// The timestamp used for all currently opened pages.
static constexpr zx::time_utc kOpenedPageTimestamp =
std::string ledger_name;
storage::PageId page_id;
// The timestamp in UTC of when the page was last closed, as an indication
// of when it was last used. If the page is currently open, the value is set
// to |PageInfo::kOpenedPageTimestamp|.
zx::time_utc timestamp;
} // namespace ledger