How does free( ) function know how many bytes to free?

[Abhishek]

Hello,

How does the free(ptr) know how many bytes of memory starting
address ptr pointing to should it free? Is this information stored at
any address or in any table? Is there any resource where I can get
more information from. Is this method used dependant on the compiler
as well?

With Regards,
Abhishek S

[Keith Thompson]

Post by Abhishek
How does the free(ptr) know how many bytes of memory starting
address ptr pointing to should it free? Is this information stored at
any address or in any table? Is there any resource where I can get
more information from. Is this method used dependant on the compiler
as well?

The comp.lang.c FAQ is at <http://www.c-faq.com/>. You've just asked
question 7.26.

Your question, if it hadn't already been answered in the FAQ, would
have been more appropriate for comp.lang.c rather than comp.std.c.