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-rw-r--r--toolkit/components/uniffi-fixture-refcounts/Cargo.toml12
-rw-r--r--toolkit/components/uniffi-fixture-refcounts/build.rs7
-rw-r--r--toolkit/components/uniffi-fixture-refcounts/src/lib.rs28
-rw-r--r--toolkit/components/uniffi-fixture-refcounts/src/refcounts.udl8
4 files changed, 55 insertions, 0 deletions
diff --git a/toolkit/components/uniffi-fixture-refcounts/Cargo.toml b/toolkit/components/uniffi-fixture-refcounts/Cargo.toml
new file mode 100644
index 0000000000..877e502711
--- /dev/null
+++ b/toolkit/components/uniffi-fixture-refcounts/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "uniffi-fixture-refcounts"
+edition = "2021"
+version = "0.21.0"
+license = "MPL-2.0"
+publish = false
+
+[dependencies]
+uniffi = { workspace = true }
+
+[build-dependencies]
+uniffi = { workspace = true, features = ["build"] }
diff --git a/toolkit/components/uniffi-fixture-refcounts/build.rs b/toolkit/components/uniffi-fixture-refcounts/build.rs
new file mode 100644
index 0000000000..9ea03e12de
--- /dev/null
+++ b/toolkit/components/uniffi-fixture-refcounts/build.rs
@@ -0,0 +1,7 @@
+/* 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/. */
+
+fn main() {
+ uniffi::generate_scaffolding("./src/refcounts.udl").unwrap();
+}
diff --git a/toolkit/components/uniffi-fixture-refcounts/src/lib.rs b/toolkit/components/uniffi-fixture-refcounts/src/lib.rs
new file mode 100644
index 0000000000..e453b22a4a
--- /dev/null
+++ b/toolkit/components/uniffi-fixture-refcounts/src/lib.rs
@@ -0,0 +1,28 @@
+/* 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/. */
+
+/// This crate exists to test managing the Rust Arc strong counts as JS objects are
+/// created/destroyed. See `test_refcounts.js` for how it's used.
+
+use std::sync::{Arc, Mutex};
+
+pub struct SingletonObject;
+
+impl SingletonObject {
+ pub fn method(&self) { }
+}
+
+static SINGLETON: Mutex<Option<Arc<SingletonObject>>> = Mutex::new(None);
+
+pub fn get_singleton() -> Arc<SingletonObject> {
+ Arc::clone(SINGLETON.lock().unwrap().get_or_insert_with(|| Arc::new(SingletonObject)))
+}
+
+pub fn get_js_refcount() -> i32 {
+ // Subtract 2: one for the reference in the Mutex and one for the temporary reference that
+ // we're calling Arc::strong_count on.
+ (Arc::strong_count(&get_singleton()) as i32) - 2
+}
+
+include!(concat!(env!("OUT_DIR"), "/refcounts.uniffi.rs"));
diff --git a/toolkit/components/uniffi-fixture-refcounts/src/refcounts.udl b/toolkit/components/uniffi-fixture-refcounts/src/refcounts.udl
new file mode 100644
index 0000000000..25ec83cfcc
--- /dev/null
+++ b/toolkit/components/uniffi-fixture-refcounts/src/refcounts.udl
@@ -0,0 +1,8 @@
+namespace refcounts {
+ SingletonObject get_singleton();
+ i32 get_js_refcount();
+};
+
+interface SingletonObject {
+ void method();
+};