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mojo/public/system/core.h

 // Copyright 2013 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 MOJO_PUBLIC_SYSTEM_CORE_H_
 #define MOJO_PUBLIC_SYSTEM_CORE_H_
 
 // Note: This header should be compilable as C.
 
 #include <stdint.h>
@@ skipping 292 matching lines @@
 inline MojoResult ReadMessage(Handle handle,
                               void* bytes, uint32_t* num_bytes,
                               Handle* handles, uint32_t* num_handles,
                               MojoReadMessageFlags flags) {
   return MojoReadMessage(handle.value,
                          bytes, num_bytes,
                          &handles[0].value, num_handles,
                          flags);
 }
 
+// Closes handle_ when deleted.

[darin (slow to review), 2013/11/01 21:48:52]

nit: how about breaking this out into its own header file. I suspect we may have
more utilities like this in the future.

(We may also want to embolden this class with move semantic goodness as in
scoped_ptr.h, but that can be for another day.)

+// This probably wants tons of improvements, but those can be made as needed.
+class ScopedHandle {
+ public:
+  ScopedHandle(Handle handle) : handle_(handle) {
+  }
+
+  ~ScopedHandle() {
+    if (handle_.value == kInvalidHandle.value)
+      return;
+    Close(handle_);
+    release();
+  }
+
+  Handle get() const { return handle_; }
+  Handle release() {
+    Handle temp = handle_;
+    handle_ = kInvalidHandle;
+    return temp;
+  }
+
+ private:
+  Handle handle_;
+};
+
 }  // namespace mojo
 #endif
 
 #endif  // MOJO_PUBLIC_SYSTEM_CORE_H_