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Unified Diff: base/supports_user_data.h

Issue 1647803004: Move base to DEPS (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 4 years, 11 months ago
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Index: base/supports_user_data.h
diff --git a/base/supports_user_data.h b/base/supports_user_data.h
deleted file mode 100644
index 711ee7d897941c9a04a7a7616d98a97218ad33b6..0000000000000000000000000000000000000000
--- a/base/supports_user_data.h
+++ /dev/null
@@ -1,81 +0,0 @@
-// 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_SUPPORTS_USER_DATA_H_
-#define BASE_SUPPORTS_USER_DATA_H_
-
-#include <map>
-
-#include "base/base_export.h"
-#include "base/memory/linked_ptr.h"
-#include "base/memory/ref_counted.h"
-#include "base/threading/thread_checker.h"
-
-namespace base {
-
-// This is a helper for classes that want to allow users to stash random data by
-// key. At destruction all the objects will be destructed.
-class BASE_EXPORT SupportsUserData {
- public:
- SupportsUserData();
-
- // Derive from this class and add your own data members to associate extra
- // information with this object. Alternatively, add this as a public base
- // class to any class with a virtual destructor.
- class BASE_EXPORT Data {
- public:
- virtual ~Data() {}
- };
-
- // The user data allows the clients to associate data with this object.
- // Multiple user data values can be stored under different keys.
- // This object will TAKE OWNERSHIP of the given data pointer, and will
- // delete the object if it is changed or the object is destroyed.
- Data* GetUserData(const void* key) const;
- void SetUserData(const void* key, Data* data);
- void RemoveUserData(const void* key);
-
- // SupportsUserData is not thread-safe, and on debug build will assert it is
- // only used on one thread. Calling this method allows the caller to hand
- // the SupportsUserData instance across threads. Use only if you are taking
- // full control of the synchronization of that hand over.
- void DetachUserDataThread();
-
- protected:
- virtual ~SupportsUserData();
-
- private:
- typedef std::map<const void*, linked_ptr<Data> > DataMap;
-
- // Externally-defined data accessible by key.
- DataMap user_data_;
- // Guards usage of |user_data_|
- ThreadChecker thread_checker_;
-
- DISALLOW_COPY_AND_ASSIGN(SupportsUserData);
-};
-
-// Adapter class that releases a refcounted object when the
-// SupportsUserData::Data object is deleted.
-template <typename T>
-class UserDataAdapter : public base::SupportsUserData::Data {
- public:
- static T* Get(const SupportsUserData* supports_user_data, const void* key) {
- UserDataAdapter* data =
- static_cast<UserDataAdapter*>(supports_user_data->GetUserData(key));
- return data ? static_cast<T*>(data->object_.get()) : NULL;
- }
-
- UserDataAdapter(T* object) : object_(object) {}
- T* release() { return object_.release(); }
-
- private:
- scoped_refptr<T> object_;
-
- DISALLOW_COPY_AND_ASSIGN(UserDataAdapter);
-};
-
-} // namespace base
-
-#endif // BASE_SUPPORTS_USER_DATA_H_
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