gecko-dev/xpcom/glue/AppData.h

58 строки
1.5 KiB
C++

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