How to pass a Structure with pointers through Named Pipes

[mcjiwe]

Hello guys,

I have this structure with another double pointer structure inside that I need to pass through named pipes with the function WriteFile from WinAPI.

typedef struct Labyrinth{
    Cell **board;
    int currentLevel;
} Labyrinth;

typedef struct Cell{    
    BOOL wall;
    BOOL player;
    BOOL object;
    BOOL enemy;
    BOOL labyrinthExit;
    int objectType;
    int objectQuantity;
} Cell;

I am passing it like this

GenerateDefaultMap(&message->game.current);

            fSuccess = WriteFile(
                hPipe,        // handle to pipe 
                &message,     // buffer to write from 
                sizeof(Message), // number of bytes to write 
                &cbWritten,   // number of bytes written 
                NULL);        // not overlapped I/O 

And I'm writing the board like this

DWORD GenerateDefaultMap(Labyrinth *labyrinth){
    int i = 0, j = 0;

    labyrinth->board = (Cell **) malloc(MIN_SIZE * sizeof(Cell *));
    for (i = 0; i < MIN_SIZE; ++i)
        labyrinth->board[i] = (Cell *) malloc(MIN_SIZE * sizeof(Cell));

    for (i = 0; i < MIN_SIZE; i++){
        for (j = 0; j < MIN_SIZE; j++){
            if (i == 0 || i == (MIN_SIZE - 1) || j == 0 || j == (MIN_SIZE - 1))
                labyrinth->board[i][j].wall = TRUE;
            else
                labyrinth->board[i][j].wall = FALSE;
        }
    }
}

When I receive it on the client side I have nothing but garbage. Could you guys point me in the right direction?

[rproffitt]

This looks incorrect from the beginning. Pointers point to memory which is memory in your app and machine. Passing pointers to another PC would be almost meaningless 99% of the time.