mirror of https://github.com/aria2/aria2
103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
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/* <!-- copyright */
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/*
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* aria2 - a simple utility for downloading files faster
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* copyright --> */
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#ifndef _D_SHARED_HANDLE_H_
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#define _D_SHARED_HANDLE_H_
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#include <ostream>
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template<class T>
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class SharedHandle {
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template<class T1>
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friend std::ostream& operator<<(std::ostream& o, const SharedHandle<T1>& sp);
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template<class T1, class T2>
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friend bool operator==(const SharedHandle<T1>& t1,
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const SharedHandle<T2>& t2);
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template<class T1, class T2>
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friend bool operator!=(const SharedHandle<T1>& t1,
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const SharedHandle<T2>& t2);
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template<class T1, class T2>
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friend bool operator<(const SharedHandle<T1>& t1, const SharedHandle<T2>& t2);
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private:
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T* obj;
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int* ucount;
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public:
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SharedHandle():obj(new T()), ucount(new int(1)) {}
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SharedHandle(T* obj):obj(obj), ucount(new int(1)) {}
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SharedHandle(const SharedHandle<T>& t):obj(t.obj), ucount(t.ucount) {
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++*ucount;
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}
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~SharedHandle() {
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if(--*ucount == 0) {
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delete obj;
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delete ucount;
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}
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}
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SharedHandle<T>& operator=(const SharedHandle<T>& t) {
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++*t.ucount;
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if(--*ucount == 0) {
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delete obj;
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delete ucount;
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}
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obj = t.obj;
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ucount = t.ucount;
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return *this;
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}
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T* operator->() { return obj; }
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T* operator->() const { return obj; }
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T* get() const {
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return obj;
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}
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};
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template<class T>
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std::ostream& operator<<(std::ostream& o, const SharedHandle<T>& sp) {
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o << *sp.obj;
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return o;
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}
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template<class T1, class T2>
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bool operator==(const SharedHandle<T1>& t1, const SharedHandle<T2>& t2) {
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return *t1.obj == *t2.obj;
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}
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template<class T1, class T2>
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bool operator!=(const SharedHandle<T1>& t1, const SharedHandle<T2>& t2) {
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return *t1.obj != *t2.obj;
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}
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template<class T1, class T2>
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bool operator<(const SharedHandle<T1>& t1, const SharedHandle<T2>& t2) {
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return *t1.obj < *t2.obj;
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}
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#endif // _D_SHARED_HANDLE_H_
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