From bc1d91e5841fab8b10c9e6f3f02cc10847522872 Mon Sep 17 00:00:00 2001
From: Bobby Holley <bobbyholley@gmail.com>
Date: Mon, 18 Sep 2017 18:26:29 -0700
Subject: [PATCH] Add a Servo_IsWorkerThread API.

---
 components/style/gecko/generated/bindings.rs | 3 +++
 ports/geckolib/glue.rs                       | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/components/style/gecko/generated/bindings.rs b/components/style/gecko/generated/bindings.rs
index 40645d492f4..4043d31bfcb 100644
--- a/components/style/gecko/generated/bindings.rs
+++ b/components/style/gecko/generated/bindings.rs
@@ -2929,6 +2929,9 @@ extern "C" {
 extern "C" {
     pub fn Servo_AssertTreeIsClean(root: RawGeckoElementBorrowed);
 }
+extern "C" {
+    pub fn Servo_IsWorkerThread() -> bool;
+}
 extern "C" {
     pub fn Servo_MaybeGCRuleTree(set: RawServoStyleSetBorrowed);
 }
diff --git a/ports/geckolib/glue.rs b/ports/geckolib/glue.rs
index bd081e7a7ae..92735be556c 100644
--- a/ports/geckolib/glue.rs
+++ b/ports/geckolib/glue.rs
@@ -3483,6 +3483,11 @@ pub extern "C" fn Servo_AssertTreeIsClean(root: RawGeckoElementBorrowed) {
     assert_subtree_is_clean(root);
 }
 
+#[no_mangle]
+pub extern "C" fn Servo_IsWorkerThread() -> bool {
+    thread_state::get().is_worker()
+}
+
 enum Offset {
     Zero,
     One