dynamic memory allocation

[amitk3553]

I had function call hci_host_data_pkt_gen() in another function main_function(),

I want to know about the memory allocated(hci_host_data_pkt_arr = new()), when it would be destructed?

Would i get the values of hci_host_data_pkt_arr in main_function() or not??

  unsigned char* hci_host_data_pkt_gen(int data_param_len)   
 {
    hci_host_data_pkt_arr = new(nothrow) unsigned char [data_param_len];
    hci_host_data_pkt_arr[0] = 0x02; 	                            //!PI
    hci_host_data_pkt_arr[1] = con_handle_lsb; 	                    /
    
    return hci_host_data_pkt_arr;    
 }

[MrHutch]

amitk3553 wrote:

I want to know about the memory allocated(hci_host_data_pkt_arr = new()), when it would be destructed?

Whenever you delete [] it.

amitk3553 wrote:

Would i get the values of hci_host_data_pkt_arr in main_function() or not??

Yes, providing that you assign the return value of the call to something in that function.

Not sure if it's intentional or not, but you haven't declared a variable for hci_host_data_pkt_arr within your function there.

Here's a generic example that might help:

#include <iostream>
#include <new>

unsigned char* someFunction( int arr_size )
{
    unsigned char* ret = new ( std::nothrow ) unsigned char [arr_size];

    ret[0] = 'a';
    ret[1] = 'z';

    return ret;
}

int main( int argc, char* argv[] )
{
    unsigned char* my_arr;
    const unsigned int ARR_SIZE = 2;

    my_arr = someFunction( ARR_SIZE );

    for( int i = 0; i < ARR_SIZE; ++i )
        std::cout << my_arr[i] << std::endl;

    delete [] my_arr;

    return 0;
}

It's not exactly safe (you could, for example, pass an array size of 1 to it) but it's for illustration purposes.