1 files changed, 56 insertions, 0 deletions
diff --git a/library/std/src/sys/solid/time.rs b/library/std/src/sys/solid/time.rs
new file mode 100644
index 000000000..ce31cb45a
--- /dev/null
+++ b/library/std/src/sys/solid/time.rs
@@ -0,0 +1,56 @@
+use super::{abi, error::expect_success};
+use crate::{mem::MaybeUninit, time::Duration};
+
+pub use super::itron::time::Instant;
+
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
+pub struct SystemTime(abi::time_t);
+
+pub const UNIX_EPOCH: SystemTime = SystemTime(0);
+
+impl SystemTime {
+    pub fn now() -> SystemTime {
+        let rtc = unsafe {
+            let mut out = MaybeUninit::zeroed();
+            expect_success(abi::SOLID_RTC_ReadTime(out.as_mut_ptr()), &"SOLID_RTC_ReadTime");
+            out.assume_init()
+        };
+        let t = unsafe {
+            libc::mktime(&mut libc::tm {
+                tm_sec: rtc.tm_sec,
+                tm_min: rtc.tm_min,
+                tm_hour: rtc.tm_hour,
+                tm_mday: rtc.tm_mday,
+                tm_mon: rtc.tm_mon - 1,
+                tm_year: rtc.tm_year,
+                tm_wday: rtc.tm_wday,
+                tm_yday: 0,
+                tm_isdst: 0,
+                tm_gmtoff: 0,
+                tm_zone: crate::ptr::null_mut(),
+            })
+        };
+        assert_ne!(t, -1, "mktime failed");
+        SystemTime(t)
+    }
+
+    pub(super) fn from_time_t(t: abi::time_t) -> Self {
+        Self(t)
+    }
+
+    pub fn sub_time(&self, other: &SystemTime) -> Result<Duration, Duration> {
+        if self.0 >= other.0 {
+            Ok(Duration::from_secs((self.0 as u64).wrapping_sub(other.0 as u64)))
+        } else {
+            Err(Duration::from_secs((other.0 as u64).wrapping_sub(self.0 as u64)))
+        }
+    }
+
+    pub fn checked_add_duration(&self, other: &Duration) -> Option<SystemTime> {
+        Some(SystemTime(self.0.checked_add(other.as_secs().try_into().ok()?)?))
+    }
+
+    pub fn checked_sub_duration(&self, other: &Duration) -> Option<SystemTime> {
+        Some(SystemTime(self.0.checked_sub(other.as_secs().try_into().ok()?)?))
+    }
+}