1 files changed, 90 insertions, 0 deletions
diff --git a/toolkit/components/glean/api/src/ffi/timing_distribution.rs b/toolkit/components/glean/api/src/ffi/timing_distribution.rs
new file mode 100644
index 0000000000..4ac5d03986
--- /dev/null
+++ b/toolkit/components/glean/api/src/ffi/timing_distribution.rs
@@ -0,0 +1,90 @@
+// 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 https://mozilla.org/MPL/2.0/.
+
+#![cfg(feature = "with_gecko")]
+
+use nsstring::nsACString;
+use std::time::Duration;
+use thin_vec::ThinVec;
+
+#[no_mangle]
+pub extern "C" fn fog_timing_distribution_start(id: u32) -> u64 {
+    with_metric!(TIMING_DISTRIBUTION_MAP, id, metric, metric.start().id)
+}
+
+#[no_mangle]
+pub extern "C" fn fog_timing_distribution_stop_and_accumulate(id: u32, timing_id: u64) {
+    with_metric!(
+        TIMING_DISTRIBUTION_MAP,
+        id,
+        metric,
+        metric.stop_and_accumulate(timing_id.into())
+    );
+}
+
+#[no_mangle]
+pub extern "C" fn fog_timing_distribution_accumulate_raw_nanos(id: u32, sample: u64) {
+    with_metric!(
+        TIMING_DISTRIBUTION_MAP,
+        id,
+        metric,
+        metric.accumulate_raw_duration(Duration::from_nanos(sample))
+    );
+}
+
+#[no_mangle]
+pub extern "C" fn fog_timing_distribution_cancel(id: u32, timing_id: u64) {
+    with_metric!(
+        TIMING_DISTRIBUTION_MAP,
+        id,
+        metric,
+        metric.cancel(timing_id.into())
+    );
+}
+
+#[no_mangle]
+pub extern "C" fn fog_timing_distribution_test_has_value(id: u32, ping_name: &nsACString) -> bool {
+    with_metric!(
+        TIMING_DISTRIBUTION_MAP,
+        id,
+        metric,
+        test_has!(metric, ping_name)
+    )
+}
+
+#[no_mangle]
+pub extern "C" fn fog_timing_distribution_test_get_value(
+    id: u32,
+    ping_name: &nsACString,
+    sum: &mut u64,
+    buckets: &mut ThinVec<u64>,
+    counts: &mut ThinVec<u64>,
+) {
+    let val = with_metric!(
+        TIMING_DISTRIBUTION_MAP,
+        id,
+        metric,
+        test_get!(metric, ping_name)
+    );
+    *sum = val.sum as _;
+    for (&bucket, &count) in val.values.iter() {
+        buckets.push(bucket as _);
+        counts.push(count as _);
+    }
+}
+
+#[no_mangle]
+pub extern "C" fn fog_timing_distribution_test_get_error(
+    id: u32,
+
+    error_str: &mut nsACString,
+) -> bool {
+    let err = with_metric!(
+        TIMING_DISTRIBUTION_MAP,
+        id,
+        metric,
+        test_get_errors!(metric)
+    );
+    err.map(|err_str| error_str.assign(&err_str)).is_some()
+}