Index: base/mac/scoped_ioplugininterface.h |
diff --git a/base/mac/scoped_ioplugininterface.h b/base/mac/scoped_ioplugininterface.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..503980c3ef8c7b42fd0f61d01f1a3b5a1e161f81 |
--- /dev/null |
+++ b/base/mac/scoped_ioplugininterface.h |
@@ -0,0 +1,76 @@ |
+// 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 BASE_MAC_SCOPED_IOPLUGININTERFACE_H_ |
+#define BASE_MAC_SCOPED_IOPLUGININTERFACE_H_ |
+ |
+#include <IOKit/IOKitLib.h> |
+ |
+#include "base/basictypes.h" |
+#include "base/compiler_specific.h" |
+ |
+namespace base { |
+namespace mac { |
+ |
+// Just like ScopedCFTypeRef but for IOCFPlugInInterface and friends |
+// (IOUSBInterfaceStruct and IOUSBDeviceStruct320 in particular). |
+template<typename T> |
+class ScopedIOPluginInterface { |
+ public: |
+ typedef T** InterfaceT; |
+ typedef InterfaceT element_type; |
+ |
+ explicit ScopedIOPluginInterface(InterfaceT object = NULL) |
+ : object_(object) { |
+ } |
+ |
+ ~ScopedIOPluginInterface() { |
+ if (object_) |
+ (*object_)->Release(object_); |
+ } |
+ |
+ void reset(InterfaceT object = NULL) { |
+ if (object_) |
+ (*object_)->Release(object_); |
+ object_ = object; |
+ } |
+ |
+ bool operator==(InterfaceT that) const { |
+ return object_ == that; |
+ } |
+ |
+ bool operator!=(InterfaceT that) const { |
+ return object_ != that; |
+ } |
+ |
+ operator InterfaceT() const { |
+ return object_; |
+ } |
+ |
+ InterfaceT get() const { |
+ return object_; |
+ } |
+ |
+ void swap(ScopedIOPluginInterface& that) { |
+ InterfaceT temp = that.object_; |
+ that.object_ = object_; |
+ object_ = temp; |
+ } |
+ |
+ InterfaceT release() WARN_UNUSED_RESULT { |
+ InterfaceT temp = object_; |
+ object_ = NULL; |
+ return temp; |
+ } |
+ |
+ private: |
+ InterfaceT object_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(ScopedIOPluginInterface); |
+}; |
+ |
+} // namespace mac |
+} // namespace base |
+ |
+#endif // BASE_MAC_SCOPED_IOPLUGININTERFACE_H_ |