tars源码分析之9

动态运行时的类怎么定义，也很直观了：

#include "util/tc_dyn_object.h"
#include <string.h>
 
namespace tars
{
/**********************************TC_DYN_RuntimeClass定义***********************************/
 
TC_DYN_RuntimeClass* TC_DYN_RuntimeClass::pFirstClass = NULL;
 
TC_DYN_Object* TC_DYN_RuntimeClass::createObject()
{
    if (m_pfnCreateObject == NULL)
    {
        return NULL;
    }
 
    TC_DYN_Object* pObject = (*m_pfnCreateObject)();
    {
        return pObject;
    }
}
 
TC_DYN_RuntimeClass* TC_DYN_RuntimeClass::load(const char *szClassName)
{
    TC_DYN_RuntimeClass* pClass;
 
    for (pClass = pFirstClass; pClass != NULL; pClass = pClass->m_pNextClass)
    {
        if (strcmp(szClassName, pClass->m_lpszClassName) == 0)
        return pClass;
    }
 
    return NULL;
}
 
/**********************************szTC_DYN_Object定义***********************************/
 
TC_DYN_RuntimeClass TC_DYN_Object::classTC_DYN_Object =
{
    (char*)"TC_DYN_Object", 
    sizeof(TC_DYN_Object), 
    NULL, 
    NULL, 
    NULL 
};
 
static TC_DYN_Init _init_TC_DYN_Object(&TC_DYN_Object::classTC_DYN_Object);
 
TC_DYN_RuntimeClass* TC_DYN_Object::GetRuntimeClass() const
{
    return &TC_DYN_Object::classTC_DYN_Object;
}
 
bool TC_DYN_Object::isKindOf(const TC_DYN_RuntimeClass* pClass) const
{
    TC_DYN_RuntimeClass* pClassThis = GetRuntimeClass();
    while (pClassThis != NULL)
    {
        if (pClassThis == pClass)
        {
            return true;
        }
 
        pClassThis = pClassThis->m_pBaseClass;
    }
    return false;
}
 
}