65 lines
1.2 KiB
C++
65 lines
1.2 KiB
C++
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_WIN_SCOPED_CO_MEM_H_
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#define BASE_WIN_SCOPED_CO_MEM_H_
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#include <objbase.h>
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#include "base/basictypes.h"
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#include "base/logging.h"
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namespace base {
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namespace win {
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// Simple scoped memory releaser class for COM allocated memory.
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// Example:
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// base::win::ScopedCoMem<ITEMIDLIST> file_item;
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// SHGetSomeInfo(&file_item, ...);
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// ...
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// return; <-- memory released
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template<typename T>
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class ScopedCoMem {
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public:
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ScopedCoMem() : mem_ptr_(NULL) {}
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~ScopedCoMem() {
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Reset(NULL);
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}
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T** operator&() { // NOLINT
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DCHECK(mem_ptr_ == NULL); // To catch memory leaks.
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return &mem_ptr_;
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}
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operator T*() {
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return mem_ptr_;
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}
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T* operator->() {
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DCHECK(mem_ptr_ != NULL);
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return mem_ptr_;
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}
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const T* operator->() const {
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DCHECK(mem_ptr_ != NULL);
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return mem_ptr_;
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}
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void Reset(T* ptr) {
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if (mem_ptr_)
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CoTaskMemFree(mem_ptr_);
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mem_ptr_ = ptr;
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}
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private:
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T* mem_ptr_;
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DISALLOW_COPY_AND_ASSIGN(ScopedCoMem);
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};
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} // namespace win
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} // namespace base
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#endif // BASE_WIN_SCOPED_CO_MEM_H_
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