65 lines
1.2 KiB
C
65 lines
1.2 KiB
C
|
// Copyright (c) 2011 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_WIN_SCOPED_CO_MEM_H_
|
||
|
|
#define BASE_WIN_SCOPED_CO_MEM_H_
|
||
|
|
|
||
|
|
#include <objbase.h>
|
||
|
|
|
||
|
|
#include "base/basictypes.h"
|
||
|
|
#include "base/logging.h"
|
||
|
|
|
||
|
|
namespace base {
|
||
|
|
namespace win {
|
||
|
|
|
||
|
|
// Simple scoped memory releaser class for COM allocated memory.
|
||
|
|
// Example:
|
||
|
|
// base::win::ScopedCoMem<ITEMIDLIST> file_item;
|
||
|
|
// SHGetSomeInfo(&file_item, ...);
|
||
|
|
// ...
|
||
|
|
// return; <-- memory released
|
||
|
|
template<typename T>
|
||
|
|
class ScopedCoMem {
|
||
|
|
public:
|
||
|
|
ScopedCoMem() : mem_ptr_(NULL) {}
|
||
|
|
~ScopedCoMem() {
|
||
|
|
Reset(NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
T** operator&() { // NOLINT
|
||
|
|
DCHECK(mem_ptr_ == NULL); // To catch memory leaks.
|
||
|
|
return &mem_ptr_;
|
||
|
|
}
|
||
|
|
|
||
|
|
operator T*() {
|
||
|
|
return mem_ptr_;
|
||
|
|
}
|
||
|
|
|
||
|
|
T* operator->() {
|
||
|
|
DCHECK(mem_ptr_ != NULL);
|
||
|
|
return mem_ptr_;
|
||
|
|
}
|
||
|
|
|
||
|
|
const T* operator->() const {
|
||
|
|
DCHECK(mem_ptr_ != NULL);
|
||
|
|
return mem_ptr_;
|
||
|
|
}
|
||
|
|
|
||
|
|
void Reset(T* ptr) {
|
||
|
|
if (mem_ptr_)
|
||
|
|
CoTaskMemFree(mem_ptr_);
|
||
|
|
mem_ptr_ = ptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
T* mem_ptr_;
|
||
|
|
|
||
|
|
DISALLOW_COPY_AND_ASSIGN(ScopedCoMem);
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace win
|
||
|
|
} // namespace base
|
||
|
|
|
||
|
|
#endif // BASE_WIN_SCOPED_CO_MEM_H_
|