125 lines
2.4 KiB
C++
125 lines
2.4 KiB
C++
/*
|
|
Copyright (C) 2001-2006, William Joseph.
|
|
All Rights Reserved.
|
|
|
|
This file is part of GtkRadiant.
|
|
|
|
GtkRadiant is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
GtkRadiant is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GtkRadiant; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "static.h"
|
|
#include "globaldefs.h"
|
|
|
|
#if GDEF_DEBUG || defined( DOXYGEN )
|
|
|
|
namespace ExampleStatic
|
|
{
|
|
// Static example
|
|
// ---- myclass.h
|
|
class MyClass
|
|
{
|
|
public:
|
|
int value;
|
|
MyClass() : value( 3 ){
|
|
}
|
|
};
|
|
|
|
typedef Static<MyClass> StaticMyClass;
|
|
|
|
// ---- main.cpp
|
|
class DynamicInitialisation
|
|
{
|
|
public:
|
|
DynamicInitialisation(){
|
|
// StaticMyClass::instance() may be invalid here because construction order is undefined
|
|
}
|
|
};
|
|
|
|
DynamicInitialisation g_dynamicInitialisation;
|
|
|
|
void duringMain(){
|
|
int bar = StaticMyClass::instance().value;
|
|
}
|
|
// end example
|
|
}
|
|
|
|
namespace ExampleLazyStatic
|
|
{
|
|
// LazyStatic example
|
|
// ---- myclass.h
|
|
class MyClass
|
|
{
|
|
public:
|
|
int value;
|
|
MyClass() : value( 3 ){
|
|
}
|
|
// destructor will never be called
|
|
};
|
|
|
|
typedef LazyStatic<MyClass> StaticMyClass;
|
|
|
|
// ---- main.cpp
|
|
class DynamicInitialisation
|
|
{
|
|
public:
|
|
DynamicInitialisation(){
|
|
int bar = StaticMyClass::instance().value;
|
|
}
|
|
};
|
|
|
|
DynamicInitialisation g_dynamicInitialisation;
|
|
|
|
void duringMain(){
|
|
int bar = StaticMyClass::instance().value;
|
|
}
|
|
// end example
|
|
}
|
|
|
|
namespace ExampleSmartStatic
|
|
{
|
|
// SmartStatic example
|
|
// ---- myclass.h
|
|
class MyClass
|
|
{
|
|
public:
|
|
int value;
|
|
MyClass() : value( 3 ){
|
|
}
|
|
};
|
|
|
|
typedef CountedStatic<MyClass> StaticMyClass;
|
|
|
|
// ---- main.cpp
|
|
class DynamicInitialisation
|
|
{
|
|
public:
|
|
DynamicInitialisation(){
|
|
// StaticMyClass::instance() is invalid before the ref is constructed
|
|
SmartStatic<MyClass> ref;
|
|
int bar = ref.instance().value;
|
|
|
|
SmartStatic<MyClass> ref2; // any number of instances are allowed.
|
|
}
|
|
};
|
|
|
|
DynamicInitialisation g_dynamicInitialisation;
|
|
|
|
void duringMain(){
|
|
int bar = SmartStatic<MyClass>().instance().value; // an instance can be a temporary
|
|
}
|
|
// end example
|
|
}
|
|
|
|
#endif
|