auto merge of #10428 : toffaletti/rust/try_lock, r=alexcrichton

I need try_lock for an algorithm I'm trying to implement in Rust.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/rt/rust_builtin.cpp b/src/rt/rust_builtin.cpp
index 90042491d1d..4c1c6a7202a 100644
--- a/src/rt/rust_builtin.cpp
+++ b/src/rt/rust_builtin.cpp
@@ -394,6 +394,11 @@ rust_lock_little_lock(lock_and_signal *lock) {
     lock->lock();
 }
 
+extern "C" bool
+rust_trylock_little_lock(lock_and_signal *lock) {
+    return lock->try_lock();
+}
+
 extern "C" void
 rust_unlock_little_lock(lock_and_signal *lock) {
     lock->unlock();