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64 lines
1.6 KiB
C++
64 lines
1.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_AppData_h
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#define mozilla_AppData_h
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#include "nsXREAppData.h"
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#include "nscore.h"
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#include "nsStringGlue.h"
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#include "nsISupportsUtils.h"
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namespace mozilla {
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// Like nsXREAppData, but releases all strong refs/allocated memory
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// in the destructor.
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class ScopedAppData : public nsXREAppData
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{
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public:
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ScopedAppData()
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{
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Zero();
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this->size = sizeof(*this);
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}
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explicit ScopedAppData(const nsXREAppData* aAppData);
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void Zero() { memset(this, 0, sizeof(*this)); }
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~ScopedAppData();
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};
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/**
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* Given |aStr| is holding a string allocated with NS_Alloc, or null:
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* replace the value in |aStr| with a new value.
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*
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* @param aNewValue Null is permitted. The string is cloned with NS_strdup.
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*/
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void SetAllocatedString(const char*& aStr, const char* aNewValue);
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/**
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* Given "str" is holding a string allocated with NS_Alloc, or null:
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* replace the value in "str" with a new value.
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*
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* @param aNewValue If |aNewValue| is the empty string, |aStr| will be set
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* to null.
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*/
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void SetAllocatedString(const char*& aStr, const nsACString& aNewValue);
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template<class T>
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void
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SetStrongPtr(T*& aPtr, T* aNewValue)
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{
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NS_IF_RELEASE(aPtr);
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aPtr = aNewValue;
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NS_IF_ADDREF(aPtr);
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}
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} // namespace mozilla
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#endif
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