[SOLVED] how to align the memory in c++ when passing in Struct

[syedshan]

hello every one,

My need is to aligned the memory by 4096, since this is the requirement of the dll I am using.
so previously it was no problem since just I used to have

char *mem_buff = (char *)_aligned_malloc(sizeof(char)*XX, 4096);

but now since I want to share the memory using struct (for the reason of using the threads) hence I am stuck with what and how to do?

struct g_thread_param {
int thr_cnt ; 
int indv_cnt ;
char mem_buff[XX]; //what to do to aligne this to 4096
} ;

thanks

 

[VirtualThread]

If I understood your question!!!!
You'll be passing the structured pointer instead of the char pointer so the issue is not there i.e. aligning the structure is not an issue. (Under no reasonable circumstances I can believe that you'll pass struct by value.)
You are just confused how you can have have malloc inside the struct. right?
Well, not an issue, just declare a char* inside the structure and initialize the structure before using it, the same way you did it in your previous code.

 

[syedshan]

thanks for reply,


well I found one way to do so in VC++ uinsg _declspec() function

struct g_thread_param {
int thr_cnt ; 
int indv_cnt ;
__declspec(align(4096)) char mem_buff[XX];
} ;

Bests
Shan