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Re: Memory footprint of a structure of structures

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Am 23.11.2011 12:33, schrieb James Kuyper:
> On 11/23/2011 06:00 AM, Jean-Michel Hautbois wrote:
>> Hi,
>>
>> I have a (big) structure, which contains other structures with
>> (sometimes) big buffers.
>>
>> Something like :
>>
>> #define BUF_SIZE 65536
>> #define BUF_SIZE2 32768
>>
>> typedef struct {
>>   unsigned char buffer1[BUF_SIZE];
>>   unsigned char buffer2[BUF_SIZE];
>> } t_buffer_head;
>>
>> typedef struct {
>>   unsigned char buffer1[BUF_SIZE2];
>>   unsigned char buffer2[BUF_SIZE2];
>> } t_buffer_subhead;
>>
>> typedef struct {
>>   t_buffer_head  header;
>>   t_buffer_subhead  subheader;
>> } t_buffer_s;
>>
>> In my use case, I have >100 structures of t_buffer_something and one
>> big structure of these structures.
>> I would like, at compile time ideally, or by a static analysis script,
>> to know the footprint in memory of the big structure (here,
>> t_buffer_s).
> 
> Any capability to calculate such things at compile time would have to be
> a feature of the particular compiler you're using; the C standard
> mandates no such feature.

How about sizeof?

Philipp

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Memory footprint of a structure of structures Jean-Michel Hautbois <jhautbois@gmail.com> - 2011-11-23 03:00 -0800
  Re: Memory footprint of a structure of structures James Kuyper <jameskuyper@verizon.net> - 2011-11-23 06:33 -0500
    Re: Memory footprint of a structure of structures Philipp Klaus Krause <pkk@spth.de> - 2011-11-23 19:58 +0100
      Re: Memory footprint of a structure of structures James Kuyper <jameskuyper@verizon.net> - 2011-11-23 15:41 -0500
        Re: Memory footprint of a structure of structures Ark <akhasin@macroexpressions.com> - 2011-11-23 23:59 -0500
          Re: Memory footprint of a structure of structures "Philip Lantz" <prl@canterey.us> - 2011-11-23 22:01 -0800
          Re: Memory footprint of a structure of structures James Kuyper <jameskuyper@verizon.net> - 2011-11-24 11:56 -0500
        Re: Memory footprint of a structure of structures Philipp Klaus Krause <pkk@spth.de> - 2011-11-24 10:06 +0100
          Re: Memory footprint of a structure of structures James Kuyper <jameskuyper@verizon.net> - 2011-11-24 12:00 -0500
            Re: Memory footprint of a structure of structures Jean-Michel Hautbois <jhautbois@gmail.com> - 2011-11-25 03:01 -0800
              Re: Memory footprint of a structure of structures Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-11-25 12:52 +0000
                Re: Memory footprint of a structure of structures "BartC" <bc@freeuk.com> - 2011-11-25 13:29 +0000
              Re: Memory footprint of a structure of structures James Kuyper <jameskuyper@verizon.net> - 2011-11-25 15:06 -0500
                Re: Memory footprint of a structure of structures Ark <akhasin@macroexpressions.com> - 2011-11-27 00:41 -0500
  Re: Memory footprint of a structure of structures Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-11-23 17:37 +0000
  Re: Memory footprint of a structure of structures Vincenzo Mercuri <vincenzo.mercuri@yahoo.it> - 2011-11-23 22:46 +0100
    Re: Memory footprint of a structure of structures Vincenzo Mercuri <vincenzo.mercuri@yahoo.it> - 2011-11-23 22:55 +0100
      Re: Memory footprint of a structure of structures Ark <akhasin@macroexpressions.com> - 2011-11-24 00:04 -0500
    Re: Memory footprint of a structure of structures Jean-Michel Hautbois <jhautbois@gmail.com> - 2011-11-24 00:39 -0800
    Re: Memory footprint of a structure of structures Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-11-24 10:34 +0000
      Re: Memory footprint of a structure of structures "BartC" <bc@freeuk.com> - 2011-11-24 12:18 +0000
        Re: Memory footprint of a structure of structures Jean-Michel Hautbois <jhautbois@gmail.com> - 2011-11-24 07:11 -0800
          Re: Memory footprint of a structure of structures jgk@panix.com (Joe keane) - 2011-11-25 22:08 +0000
            Re: Memory footprint of a structure of structures Ian Collins <ian-news@hotmail.com> - 2011-11-26 11:37 +1300
              Re: Memory footprint of a structure of structures jgk@panix.com (Joe keane) - 2011-11-27 23:20 +0000
        Re: Memory footprint of a structure of structures Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-11-27 10:17 +0000

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