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From: steve <sgonedes1977@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: avoiding strdup()
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Date: Tue, 30 Apr 2024 23:36:02 -0400
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i@fuzy.me writes:

> Lawrence D'Oliveiro <ldo@nz.invalid> writes:
>
< > I was looking at the systemd source code the other day, and came across a 
< > lot of this sort of thing:
< >
< >     _cleanup_free_ char *link = NULL;
< >
< > Now, what do you suppose “_cleanup_free_” does?
>

I usually use void * , probably a struct of some sort for marking
garbage.


> It's a dark magic of GCC to automatically free the memory when pointer
> goes out of scope.

Try alloca - for stack loading; there is a garbage collector for C . The
Boehm-Demers-Weiser conservative can be used in place of malloc.

with gcc you can stack allocate with nested functions, like in object pascal.

``
A “nested function” is a function defined inside another function.
Nested functions are supported as an extension in GNU C, but are not
supported by GNU C++.

 The nested function's name is local to the block where it is defined.
For example, here we define a nested function named ‘square’, and call
it twice:

     foo (double a, double b)
     {
       double square (double z) { return z * z; }

       return square (a) + square (b);
     }

from the gcc info manual.
''

have fun; gcc is a greate compiler.