mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
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/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stratosphere.hpp>
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#include "lm_time_util.hpp"
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namespace ams::lm::srv {
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namespace {
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constinit std::atomic_bool g_is_time_invalid = false;
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constinit time::PosixTime InvalidPosixTime = { .value = 0 };
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constexpr bool IsValidPosixTime(time::PosixTime time) {
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return time.value > 0;
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}
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void EnsureTimeInitialized() {
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static constinit os::SdkMutex g_time_initialized_mutex;
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static constinit bool g_time_initialized = false;
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if (AMS_UNLIKELY(!g_time_initialized)) {
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std::scoped_lock lk(g_time_initialized_mutex);
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if (AMS_LIKELY(!g_time_initialized)) {
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R_ABORT_UNLESS(time::Initialize());
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g_time_initialized = true;
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}
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}
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}
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}
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time::PosixTime GetCurrentTime() {
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/* Ensure that we can use time services. */
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EnsureTimeInitialized();
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/* Repeatedly try to get a valid time. */
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for (auto wait_seconds = 1; wait_seconds <= 8; wait_seconds *= 2) {
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/* Get the standard user system clock time. */
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time::PosixTime current_time{};
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if (R_FAILED(time::StandardUserSystemClock::GetCurrentTime(std::addressof(current_time)))) {
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return InvalidPosixTime;
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}
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/* If the time is valid, return it. */
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if (IsValidPosixTime(current_time)) {
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return current_time;
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}
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/* Check if we've failed to get a time in the past. */
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if (g_is_time_invalid) {
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return InvalidPosixTime;
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}
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/* Wait a bit before trying again. */
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os::SleepThread(TimeSpan::FromSeconds(wait_seconds));
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}
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/* We failed to get a valid time. */
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g_is_time_invalid = true;
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return InvalidPosixTime;
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}
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}
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