Is memory assigned by alloca garbage collected? Because std.process uses alloca, but doesn't use free.

-----------------------
Carlos Santander Bernal

In article <cnrkh1$fo2$1@digitaldaemon.com>, Carlos Santander B. says...
>
>Is memory assigned by alloca garbage collected? Because std.process uses alloca, but doesn't use free.
>
>-----------------------
>Carlos Santander Bernal
>
>

Check this out:

http://www.rt.com/man/alloca.3.html

Carlos Santander B. schrieb:

> Is memory assigned by alloca garbage collected? Because std.process uses alloca, but doesn't use free.

Alloca allocates memory using stack pointer increment. This memory is reclaimed when you return from a function and the stack pointer is set back to what it was. Alloca is the fastest way to allocate memory. Another funny thing is, since stack is a GC root, the memory you get using alloca also is - so it is safe to store pointers to GCed memory there as well.

-eye

Ilya Minkov schrieb:

> Alloca allocates memory using stack pointer increment. This memory is 

ARGH, decrement, not increment. Because stack grows top-down.

-eye.

"Dave" <Dave_member@pathlink.com> escribió en el mensaje
news:cnrq0b$o40$1@digitaldaemon.com...
| In article <cnrkh1$fo2$1@digitaldaemon.com>, Carlos Santander B. says...
| >
| >Is memory assigned by alloca garbage collected? Because std.process uses
alloca,
| >but doesn't use free.
| >
| >-----------------------
| >Carlos Santander Bernal
| >
| >
|
| Check this out:
|
| http://www.rt.com/man/alloca.3.html
|
|

Thanks, Dave and Ilya.

-----------------------
Carlos Santander Bernal

On Mon, 22 Nov 2004 17:18:04 +0100, Ilya Minkov <minkov@cs.tum.edu> wrote:

> Ilya Minkov schrieb:
>
>> Alloca allocates memory using stack pointer increment. This memory is
>
> ARGH, decrement, not increment. Because stack grows top-down.
>
> -eye.

Most of the time :D. It is _possible_ to get it to grow up, I believe,
and don't quote me on it, but I suspect other architectures have their
own conventions.

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