Index: src/untrusted/init/auto_lock.h |
diff --git a/src/untrusted/init/auto_lock.h b/src/untrusted/init/auto_lock.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..4d38395804a699e9eb88d3ce0a8ce4aed67cfcb6 |
--- /dev/null |
+++ b/src/untrusted/init/auto_lock.h |
@@ -0,0 +1,43 @@ |
+// Copyright (c) 2012 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef NATIVE_CLIENT_SRC_UNTRUSTED_INIT_AUTO_LOCK_H_ |
+#define NATIVE_CLIENT_SRC_UNTRUSTED_INIT_AUTO_LOCK_H_ |
+ |
+#include <pthread.h> |
+#include "sdk_util/macros.h" |
+#include "sdk_util/simple_lock.h" |
+ |
+namespace nacl { |
+ |
+// This macro is provided to allow us to quickly instrument locking for |
+// debugging purposes. |
+#define AUTO_LOCK(lock) \ |
+ ::nacl::AutoLock Lock##__LINE__(lock); |
+ |
+class AutoLock { |
+ public: |
+ AutoLock(const SimpleLock& lock) { |
+ lock_ = lock.mutex(); |
+ pthread_mutex_lock(lock_); |
+ } |
+ |
+ ~AutoLock() { |
+ Unlock(); |
+ } |
+ |
+ void Unlock() { |
+ if (lock_) pthread_mutex_unlock(lock_); |
+ lock_ = NULL; |
+ } |
+ |
+ private: |
+ pthread_mutex_t* lock_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(AutoLock); |
+}; |
+ |
+} // namespace nacl |
+ |
+#endif |