1 files changed, 26 insertions, 0 deletions
diff --git a/memory/build/Mutex.cpp b/memory/build/Mutex.cpp
new file mode 100644
index 0000000000..1450210293
--- /dev/null
+++ b/memory/build/Mutex.cpp
@@ -0,0 +1,26 @@
+/* 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/. */
+
+#include "Mutex.h"
+
+#include <errno.h>
+
+#include "mozilla/Assertions.h"
+
+bool Mutex::TryLock() {
+#if defined(XP_WIN)
+  return !!TryEnterCriticalSection(&mMutex);
+#elif defined(XP_DARWIN)
+  return os_unfair_lock_trylock(&mMutex);
+#else
+  switch (pthread_mutex_trylock(&mMutex)) {
+    case 0:
+      return true;
+    case EBUSY:
+      return false;
+    default:
+      MOZ_CRASH("pthread_mutex_trylock error.");
+  }
+#endif
+}