1 files changed, 71 insertions, 0 deletions
diff --git a/tools/profiler/rust-api/src/time.rs b/tools/profiler/rust-api/src/time.rs
new file mode 100644
index 0000000000..56315690c9
--- /dev/null
+++ b/tools/profiler/rust-api/src/time.rs
@@ -0,0 +1,71 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+//! Gecko profiler time.
+
+use crate::gecko_bindings::{bindings, structs::mozilla};
+use std::mem::MaybeUninit;
+
+/// Profiler time for the marker API.
+/// This should be used as the `MarkerTiming` parameter.
+/// E.g.:
+///
+/// ```
+/// let start = ProfilerTime::now();
+/// // ...some code...
+/// gecko_profiler::add_untyped_marker(
+///     "marker name",
+///     category,
+///     MarkerOptions {
+///         timing: MarkerTiming::interval_until_now_from(start),
+///         ..Default::default()
+///     },
+/// );
+/// ```
+#[derive(Debug)]
+pub struct ProfilerTime(pub(crate) mozilla::TimeStamp);
+
+impl ProfilerTime {
+    pub fn now() -> ProfilerTime {
+        let mut marker_timing = MaybeUninit::<mozilla::TimeStamp>::uninit();
+        unsafe {
+            bindings::gecko_profiler_construct_timestamp_now(marker_timing.as_mut_ptr());
+            ProfilerTime(marker_timing.assume_init())
+        }
+    }
+
+    pub fn add_microseconds(self, microseconds: f64) -> Self {
+        let mut dest = MaybeUninit::<mozilla::TimeStamp>::uninit();
+        unsafe {
+            bindings::gecko_profiler_add_timestamp(&self.0, dest.as_mut_ptr(), microseconds);
+            ProfilerTime(dest.assume_init())
+        }
+    }
+
+    pub fn subtract_microseconds(self, microseconds: f64) -> Self {
+        let mut dest = MaybeUninit::<mozilla::TimeStamp>::uninit();
+        unsafe {
+            bindings::gecko_profiler_subtract_timestamp(&self.0, dest.as_mut_ptr(), microseconds);
+            ProfilerTime(dest.assume_init())
+        }
+    }
+}
+
+impl Clone for ProfilerTime {
+    fn clone(&self) -> Self {
+        let mut dest = MaybeUninit::<mozilla::TimeStamp>::uninit();
+        unsafe {
+            bindings::gecko_profiler_clone_timestamp(&self.0, dest.as_mut_ptr());
+            ProfilerTime(dest.assume_init())
+        }
+    }
+}
+
+impl Drop for ProfilerTime {
+    fn drop(&mut self) {
+        unsafe {
+            bindings::gecko_profiler_destruct_timestamp(&mut self.0);
+        }
+    }
+}