/usr/include/log4cplus/helpers/pointer.h is in liblog4cplus-dev 1.0.4-1.
This file is owned by root:root, with mode 0o644.
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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 | // Module: Log4CPLUS
// File: pointer.h
// Created: 6/2001
// Author: Tad E. Smith
//
//
// Copyright 2001-2009 Tad E. Smith
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Note: Some of this code uses ideas from "More Effective C++" by Scott
// Myers, Addison Wesley Longmain, Inc., (c) 1996, Chapter 29, pp. 183-213
//
/** @file */
#ifndef _LOG4CPLUS_HELPERS_POINTERS_HEADER_
#define _LOG4CPLUS_HELPERS_POINTERS_HEADER_
#include <log4cplus/config.hxx>
#include <memory>
#include <stdexcept>
#include <string>
#include <algorithm>
#include <cassert>
namespace log4cplus {
namespace helpers {
/******************************************************************************
* Class SharedObject (from pp. 204-205) *
******************************************************************************/
class LOG4CPLUS_EXPORT SharedObject
{
public:
void addReference() const;
void removeReference() const;
protected:
// Ctor
SharedObject()
: access_mutex(LOG4CPLUS_MUTEX_CREATE)
, count(0)
{ }
SharedObject(const SharedObject&)
: access_mutex(LOG4CPLUS_MUTEX_CREATE)
, count(0)
{ }
// Dtor
virtual ~SharedObject();
// Operators
SharedObject& operator=(const SharedObject&) { return *this; }
public:
LOG4CPLUS_MUTEX_PTR_DECLARE access_mutex;
private:
mutable int count;
};
/******************************************************************************
* Template Class SharedObjectPtr (from pp. 203, 206) *
******************************************************************************/
template<class T>
class SharedObjectPtr
{
public:
// Ctor
explicit
SharedObjectPtr(T* realPtr = 0)
: pointee(realPtr)
{
addref ();
}
SharedObjectPtr(const SharedObjectPtr& rhs)
: pointee(rhs.pointee)
{
addref ();
}
// Dtor
~SharedObjectPtr()
{
if (pointee)
pointee->removeReference();
}
// Operators
bool operator==(const SharedObjectPtr& rhs) const { return (pointee == rhs.pointee); }
bool operator!=(const SharedObjectPtr& rhs) const { return (pointee != rhs.pointee); }
bool operator==(const T* rhs) const { return (pointee == rhs); }
bool operator!=(const T* rhs) const { return (pointee != rhs); }
T* operator->() const {assert (pointee); return pointee; }
T& operator*() const {assert (pointee); return *pointee; }
SharedObjectPtr& operator=(const SharedObjectPtr& rhs)
{
return this->operator = (rhs.pointee);
}
SharedObjectPtr& operator=(T* rhs)
{
SharedObjectPtr<T> (rhs).swap (*this);
return *this;
}
// Methods
T* get() const { return pointee; }
void swap (SharedObjectPtr & other) throw ()
{
std::swap (pointee, other.pointee);
}
typedef T * (SharedObjectPtr:: * unspec_bool_type) () const;
operator unspec_bool_type () const
{
return pointee ? &SharedObjectPtr::get : 0;
}
bool operator ! () const
{
return ! pointee;
}
private:
// Methods
void addref() const
{
if (pointee)
pointee->addReference();
}
// Data
T* pointee;
};
} // end namespace helpers
} // end namespace log4cplus
#endif // _LOG4CPLUS_HELPERS_POINTERS_HEADER_
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