/usr/include/corelinux/Singleton.hpp is in libcorelinux-dev 0.4.32-7.4ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 | #if !defined(__SINGLETON_HPP)
#define __SINGLETON_HPP
/*
CoreLinux++
Copyright (C) 1999 CoreLinux Consortium
The CoreLinux++ Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The CoreLinux++ Library Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#if !defined(__COMMON_HPP)
#include <Common.hpp>
#endif
namespace corelinux
{
/**
Ensure a class only has one instance, and provide a global point of access to it.
This is easier said than done outside of the solution domain. While we can
declare a protocol by which the use of this type will prevent multiple applications,
we can't insure that the implementor won't violate said protocol.
*/
template< class TypeImpl >
class Singleton : public CoreLinuxObject
{
public:
//
// Constructors and destructor
//
/**
Default constructor sets theSingleton and theType
after insuring that they are not already
instantiated
@exception Assertion
*/
Singleton( void ) throw( Assertion )
:
CoreLinuxObject()
{
REQUIRE( theSingleton == NULLPTR );
REQUIRE( theType == NULLPTR );
theSingleton = this;
theType = new TypeImpl;
}
/**
Initializing constructor
*/
Singleton( TypeImpl *aTypePtr ) throw( Assertion )
:
CoreLinuxObject()
{
ENSURE( aTypePtr != NULLPTR );
REQUIRE( theSingleton == NULLPTR );
REQUIRE( theType == NULLPTR );
theSingleton = this;
theType = aTypePtr;
}
/// Virtual destructor
virtual ~Singleton( void )
{
if( theSingleton == this )
{
theSingleton = NULLPTR;
if( theType != NULLPTR )
{
delete theType;
theType = NULLPTR;
}
else
{
; // do nothing
}
}
else
{
; // do nothing
}
}
//
// Operator overload
//
/**
Equality operator tests that theSingleton instances
are equal
@param Singleton const reference
@return bool true if equal
*/
bool operator==( const Singleton & aSingleton ) const
{
return ( &aSingleton == theSingleton );
}
//
// Accessor
//
/**
Returns the instance of the TypeImpl
@return TypeImpl pointer
*/
static TypeImpl * instance( void )
{
return theType;
}
private:
//
// Constructor
//
/**
Copy constructor is not allowed
@exception Assertion - NEVER_GET_HERE
*/
Singleton( const Singleton & ) throw( Assertion )
:
CoreLinuxObject()
{
NEVER_GET_HERE;
}
//
// Operator overload
//
/**
Assignment operator is not allowed
@exception Assertion - NEVER_GET_HERE
*/
Singleton & operator=( const Singleton & )
throw( Assertion )
{
NEVER_GET_HERE;
return (*this);
}
private:
/// The singleton instance
static Singleton<TypeImpl> *theSingleton;
/// The type instance
static TypeImpl *theType;
};
/// Static definition for theSingleton
template< class TypeImpl >
Singleton<TypeImpl> *Singleton<TypeImpl>::theSingleton( NULLPTR );
/// Static definition for theType
template< class TypeImpl >
TypeImpl *Singleton<TypeImpl>::theType( NULLPTR );
}
#endif // if !defined(__SINGLETON_HPP)
/*
Common rcs information do not modify
$Author: prudhomm $
$Revision: 1.1 $
$Date: 2000/04/23 20:43:13 $
$Locker: $
*/
|