在共享内存提升中复制char *

Question

I want to know if I can write in a file (shared memory with boost) a char*. I have create a Template, and works fine with "int" and "string", but with char*, I can access to them in memory, when I am executing the program, but the data is not stored in the file afterwards as happens with ints and strings.

The representative piece of the code would be: (T would be char*)

//DECLARATIONS
MyMap *mymap;
managed_mapped_file seg = managed_mapped_file(open_or_create, tableName, tablesize);
mymap = seg->find_or_construct<MyMap>("MyMap")      //object name
            (std::less<T>() //first  constructor parameter
            ,*alloc_inst);    //second constructor parameter

//THE METHOD TO ADD THE ENTRIES
template<class T>
void ShareDB<T>::add_ref_info_to_db (const T &Symbol_Index , const std::string &a_info){

MyMap::iterator res =  mymap->find(Symbol_Index);

mymap->insert(std::pair<const T, shared_string>(Symbol_Index, localSymbol));

so I call to the Template like that:

ShareDB <char *> ex;
ex.openDB(dataBaseName,"TestMutex", 196608, true);
ex.add_ref_info_to_db (a,ex.RefInfoRecord);

Maybe it is just that I can not write pointers...I am not sure...

Thanks in advance

Answer 1

除了template<class T>考虑template<typename T> ... ...但是我将简单地使用std::string除非您必须特别支持char * 。