Hello everyone. I had met a memory leak error runnnin program generated
from a source which is attached to this mail.
[flow]
--The "sampleclass"-class has a wstring object as a member variable and
a setter and a getter for this variable.
--A sampleclass instance generated by the default new.
--A pointer to sampleclass instance attached to intrusive_ptr<sampleclass>.
--Make wstring instance with string L"0123456789abcdef".
--The wstring instance set to a sampleclass instance using the
sampleclass's setter.
--Finish this program and a memory leak occurs.
[emvironment]
WindowsXP 64bit
VisualStudio2005 sp1
boost-1_34_1
Unicode Charset
#include "stdafx.h"
#include <iostream>
#include
#include
#include
using namespace std;
using namespace boost;
#ifdef _DEBUG
#define _CRTDBG_MAP_ALLOC
#include
#include
#define new ::new(_NORMAL_BLOCK, __FILE__, __LINE__)
#endif
namespace test {
class countable {
public:
countable() : refcount(0) { }
void add_ref( void ) { ++refcount; }
void release( void ) {
if( 0 == --refcount ) {
delete this;
}
}
int getcount() { return static_cast<long>(refcount); }
private:
boost::detail::atomic_count refcount;
};
class sampleclass : public countable {
wstring message;
public:
sampleclass(){}
sampleclass( const wstring &mes ) : message(mes) {}
void setmessage( const wstring &mes ) {
message = mes;
}
wstring getmessage() { return message; }
};
};
namespace boost {
using namespace test;
inline void intrusive_ptr_add_ref(countable *p) {
p->add_ref();
}
inline void intrusive_ptr_release(countable *p) {
p->release();
}
}
int _tmain(int argc, _TCHAR* argv[])
{
_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF|_CRTDBG_LEAK_CHECK_DF);
using namespace test; {
intrusive_ptr<sampleclass> intrusive_( new sampleclass(wstring(L"initial")) );
//---------- memory leak prone ------------------------//
wstring mes( L"0123456789abcdef" );
intrusive_->setmessage( mes );
//---------- memory leak prone ------------------------//
wcout << intrusive_->getmessage().c_str() << endl;
}
getchar();
return EXIT_SUCCESS;
}
