Hello,
I first present to you my code and I will explain my problem with the code .
ShmString.h :
namespace ip=boost::interprocess;
typedef ip::allocator
CharAllocator;
class ShmString : public ip::basic_string
{
public:
ShmString ();
virtual ~ShmString ();
/**
* The segment to build the string
*/
static ip::managed_shared_memory* st_segment;
}
This class served to have some string in memory. The following Element.h
used it :
class Element
{
public:
Element (const std::string dir, const std::string type,
ip::managed_shared_memory * segment);
private:
ShmString dir;
ShmString file;
ShmString type;
ip::managed_shared_memory * segment;
};
I have four attributes that declare it. When I tried to define all the
attributes in the constructor like this in Element.cpp :
Element::Element (const string dir, const string file, const string type,
ip::managed_shared_memory *segment){
try{
this->dir.assign(dir.c_str());
this->file.assign(file.c_str());
}
catch(ip::interprocess_exception &e){
ostringstream oss;
const std::string what(e.what());
oss << "Class Element in constructor 1 -> ";
oss << what;
throw EventException(oss.str().c_str(), __LINE__ );
}
}
If for example "const string dir " has the size more than 10 (the capacity
by default for a ShmString object), I obtained an error like this :
x0807436f in boost::interprocess::basic_string, boost::interprocess::iset_index>
::assign (this=0xb7428274,
s=0xb9adf154
)
I tried to used the other constructors by default for basic_string but it
remains the same. This code only works when in the constructors the string
size are below 10.
Could you someone explain me why I obtain this? Do I have some faulty code?
Could you provide some examples on how store string with
interprocess::basic_string in shared memory for a size for more than 10
characters?
I will be very grateful because I am lost...
Thanks you in advance
Regards
Samuel
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