[NaCl SDK] Upate atomic ops in nacl_io

native_client_sdk/src/libraries/sdk_util/auto_lock.h

Index: native_client_sdk/src/libraries/sdk_util/auto_lock.h
diff --git a/native_client_sdk/src/libraries/sdk_util/auto_lock.h b/native_client_sdk/src/libraries/sdk_util/auto_lock.h
index 88215d0cb31acb3c25c084be2692fe75870a3975..33fca93bc8043681cdd6bc4e6d1436dea29404b0 100644
--- a/native_client_sdk/src/libraries/sdk_util/auto_lock.h
+++ b/native_client_sdk/src/libraries/sdk_util/auto_lock.h
@@ -7,9 +7,14 @@
 #define LIBRARIES_SDK_UTIL_AUTO_LOCK_H_
 
 #include <pthread.h>
+#include "sdk_util/simple_lock.h"
 
 class AutoLock {
  public:
+  explicit AutoLock(SimpleLock* lock) {
+    lock_ = &lock->lock_;
+    pthread_mutex_lock(lock_);
+  }
   explicit AutoLock(pthread_mutex_t* lock) {
     lock_ = lock;
     pthread_mutex_lock(lock_);