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fix pbs with empty object

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This commit is contained in:
dockes 2006-12-05 15:16:53 +00:00
parent 5c8d9bc272
commit 42dcdc51cd
1 changed files with 38 additions and 21 deletions
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59
src/utils/refcntr.h
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@ -3,28 +3,45 @@
// See Stroustrup C++ 3rd ed, p. 783
template <class X> class RefCntr {
X *rep;
int *pcount;
public:
X * operator->() {return rep;}
RefCntr() : rep(0), pcount(new int(1)) {}
RefCntr(X *pp) : rep(pp), pcount(new int(1)) {}
RefCntr(const RefCntr &r) :rep(r.rep), pcount(r.pcount) { (*pcount)++;}
RefCntr& operator=(const RefCntr& r) {
if (rep == r.rep) return *this;
if (pcount && --(*pcount) == 0) {
delete rep;
delete pcount;
X *rep;
int *pcount;
public:
RefCntr()
: rep(0), pcount(0)
{}
RefCntr(X *pp)
: rep(pp), pcount(new int(1))
{}
RefCntr(const RefCntr &r)
: rep(r.rep), pcount(r.pcount)
{
if (pcount)
(*pcount)++;
}
rep = r.rep;
pcount = r.pcount;
if (pcount)
(*pcount)++;
return *this;
}
~RefCntr() {if (--(*pcount) == 0) {delete rep;delete pcount;}}
int getcnt() const {return *pcount;}
const X * getptr() const {return rep;}
RefCntr& operator=(const RefCntr& r)
{
if (rep == r.rep)
return *this;
if (pcount && --(*pcount) == 0) {
delete rep;
delete pcount;
}
rep = r.rep;
pcount = r.pcount;
if (pcount)
(*pcount)++;
return *this;
}
~RefCntr()
{
if (pcount && --(*pcount) == 0) {
delete rep;
delete pcount;
}
}
X *operator->() {return rep;}
int getcnt() const {return pcount ? *pcount : 0;}
const X *getptr() const {return rep;}
};