From 91de538c9802e7c45cadc5391450631c74f593d2 Mon Sep 17 00:00:00 2001
From: Jason Toffaletti <jason@topsy.com>
Date: Mon, 11 Nov 2013 13:33:43 -0800
Subject: add rust_trylock_little_lock

Try to acquire lock and succeed only if lock is not already held.
Uses TryEnterCriticalSection or pthread_mutex_trylock.
---
 src/rt/rust_builtin.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/rt/rust_builtin.cpp')

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();
-- 
cgit 1.4.1-3-g733a5