use core::fmt::Debug; use alloc::{string::String, sync::Arc}; use system_error::SystemError; use crate::{ libs::rwlock::RwLock, time::{Instant, PosixTimeSpec, NSEC_PER_SEC}, }; use self::sysfs::RtcGeneralDevice; use super::base::device::Device; pub mod class; pub mod interface; pub mod rtc_cmos; mod sysfs; mod utils; /// 全局默认rtc static GLOBAL_DEFAULT_RTC: RwLock>> = RwLock::new(None); /// 获取全局的默认的rtc fn global_default_rtc() -> Option> { GLOBAL_DEFAULT_RTC.read().clone() } /// 注册默认的rtc fn register_default_rtc(general_device: Arc) -> bool { let upg = GLOBAL_DEFAULT_RTC.upgradeable_read(); if let Some(old_dev) = upg.as_ref() { if old_dev.priority() >= general_device.priority() { return false; } } let mut write = upg.upgrade(); write.replace(general_device); return true; } /// RTC设备的trait pub trait RtcDevice: Device { fn class_ops(&self) -> &'static dyn RtcClassOps; } #[allow(dead_code)] pub trait RtcClassOps: Send + Sync + Debug { fn read_time(&self, dev: &Arc) -> Result; fn set_time(&self, dev: &Arc, time: &RtcTime) -> Result<(), SystemError>; } #[derive(Default, Debug, Clone, Copy)] pub struct RtcTime { /// `second`: 秒,范围从 0 到 59 pub second: i32, /// `minute`: 分钟,范围从 0 到 59 pub minute: i32, /// `hour`: 小时,范围从 0 到 23 pub hour: i32, /// `mday`: 一个月中的第几天,范围从 1 到 31 pub mday: i32, /// `month`: 月份,范围从 0 到 11 pub month: i32, /// `year`: 年份(相对于1900年) pub year: i32, /// `wday`: 一周中的第几天,范围从 0(周日)到 6(周六) pub wday: i32, /// `yday`: 一年中的第几天,范围从 1 到 366 pub yday: i32, /// `isdst`: 表示是否为夏令时,通常如果是夏令时,此值为正,否则为零或负 pub isdst: i32, } impl RtcTime { /// 返回一个格式化的日期字符串 /// /// 例如,如果日期为2021年1月1日,则返回"2021-01-01" pub fn date_string(&self) -> String { format!( "{:04}-{:02}-{:02}", self.year_real(), self.month_real(), self.mday ) } /// 返回一个格式化的时间字符串 /// /// 例如,如果时间为12:00:00,则返回"12:00:00" pub fn time_string(&self) -> String { format!("{:02}:{:02}:{:02}", self.hour, self.minute, self.second) } pub fn valid(&self) -> bool { !(self.year < 70 || self.year > (i32::MAX - 1900) || self.month >= 12 || self.month < 0 || self.mday < 1 || self.mday > self.month_days() || self.hour >= 24 || self.hour < 0 || self.minute >= 60 || self.minute < 0 || self.second >= 60 || self.second < 0) } /// 获取当月有多少天 pub fn month_days(&self) -> i32 { let days_in_month = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]; let month = self.month as usize; let mut days = days_in_month[month]; if month == 1 && self.is_leap_year() { days += 1; } days } /// 判断当前是否为闰年 pub fn is_leap_year(&self) -> bool { let year = self.year + 1900; (year % 4 == 0 && year % 100 != 0) || year % 400 == 0 } pub fn year_real(&self) -> i32 { self.year + 1900 } pub fn month_real(&self) -> i32 { self.month + 1 } } impl From for PosixTimeSpec { fn from(val: RtcTime) -> Self { let instant = Instant::mktime64( val.year_real() as u32, (val.month + 1) as u32, (val.mday) as u32, val.hour as u32, val.minute as u32, val.second as u32, ); /* 注意:RTC 仅存储完整的秒数。它是任意的,它存储的是最接近的值还是 * 分割秒数截断的值。然而,重要的是我们使用它来存储截断的值。这是因为 * 否则在 RTC 同步函数中,需要读取 both xtime.tv_sec 和 xtime.tv_nsec。 * 在某些处理器上(例如 ARM),对 >32位的原子读取是不可行的。所以, * 存储最接近的值会减慢同步 API 的速度。因此,这里我们存储截断的值 * 并在后面加上 0.5s 的最佳猜测。 */ PosixTimeSpec::new(instant.secs(), (NSEC_PER_SEC >> 1).into()) } } /// 全局默认rtc的优先级 #[allow(dead_code)] #[derive(Debug, Default, PartialEq, PartialOrd, Clone, Copy)] pub enum GeneralRtcPriority { #[default] L0 = 0, L1, }