1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/xpcom/glue/AppData.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,58 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef mozilla_AppData_h
1.10 +#define mozilla_AppData_h
1.11 +
1.12 +#include "nsXREAppData.h"
1.13 +#include "nscore.h"
1.14 +#include "nsStringGlue.h"
1.15 +#include "nsISupportsUtils.h"
1.16 +
1.17 +namespace mozilla {
1.18 +
1.19 +// Like nsXREAppData, but releases all strong refs/allocated memory
1.20 +// in the destructor.
1.21 +class NS_COM_GLUE ScopedAppData : public nsXREAppData
1.22 +{
1.23 +public:
1.24 + ScopedAppData() { Zero(); this->size = sizeof(*this); }
1.25 +
1.26 + ScopedAppData(const nsXREAppData* aAppData);
1.27 +
1.28 + void Zero() { memset(this, 0, sizeof(*this)); }
1.29 +
1.30 + ~ScopedAppData();
1.31 +};
1.32 +
1.33 +/**
1.34 + * Given "str" is holding a string allocated with NS_Alloc, or null:
1.35 + * replace the value in "str" with a new value.
1.36 + *
1.37 + * @param newvalue Null is permitted. The string is cloned with
1.38 + * NS_strdup
1.39 + */
1.40 +void SetAllocatedString(const char *&str, const char *newvalue);
1.41 +
1.42 +/**
1.43 + * Given "str" is holding a string allocated with NS_Alloc, or null:
1.44 + * replace the value in "str" with a new value.
1.45 + *
1.46 + * @param newvalue If "newvalue" is the empty string, "str" will be set
1.47 + * to null.
1.48 + */
1.49 +void SetAllocatedString(const char *&str, const nsACString &newvalue);
1.50 +
1.51 +template<class T>
1.52 +void SetStrongPtr(T *&ptr, T* newvalue)
1.53 +{
1.54 + NS_IF_RELEASE(ptr);
1.55 + ptr = newvalue;
1.56 + NS_IF_ADDREF(ptr);
1.57 +}
1.58 +
1.59 +} // namespace mozilla
1.60 +
1.61 +#endif
