[ECOS] question about "sys_write() " call.

[ECOS] question about "sys_write() " call.

[Tony Ko]

hi.
what's for "sys_write" call ( on sys_generic.c ).
does it have something with system call?
then when is this called?

thanks in advance.

Tony.

[ECOS] question about thread return

[Yong]

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when thread function normally returns ,
do I need to do any cleanup work for it ?
like calling cyg_thread_delete() .

thanks a lot .
  
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Re: [ECOS] question about "sys_write() " call.

[Jonathan Larmour]

Tony Ko wrote:
> 
> hi.
> what's for "sys_write" call ( on sys_generic.c ).
> does it have something with system call?
> then when is this called?

It's called by GNU applications linked with newlib, not eCos.

Jifl
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Re: [ECOS] question about thread return

[Jonathan Larmour]

Yong wrote:
> 
> when thread function normally returns ,
> do I need to do any cleanup work for it ?
> like calling cyg_thread_delete() .

You don't need to in the sense that the thread will be suspended. But if
you want to reclaim the memory, you should call cyg_thread_delete().

Jifl
-- 
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine
Come to the Red Hat TechWorld open source conference in Brussels!
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Re: [ECOS] question about "sys_write() " call.

[Mark Salter]

>>>>> Jonathan Larmour writes:

> Tony Ko wrote:
>> 
>> hi.
>> what's for "sys_write" call ( on sys_generic.c ).
>> does it have something with system call?
>> then when is this called?

> It's called by GNU applications linked with newlib, not eCos.

That would be the sys_write in redboot. The sys_write in
sys_generic.c is something else.

--Mark

Re: [ECOS] question about "sys_write() " call.

[Jonathan Larmour]

Mark Salter wrote:
> 
> >>>>> Jonathan Larmour writes:
> 
> > Tony Ko wrote:
> >>
> >> hi.
> >> what's for "sys_write" call ( on sys_generic.c ).
> >> does it have something with system call?
> >> then when is this called?
> 
> > It's called by GNU applications linked with newlib, not eCos.
> 
> That would be the sys_write in redboot. The sys_write in
> sys_generic.c is something else.

Ah, oops, yes. There are two sys_writes around. The other one is in the BS
net stack and is only used when not using the fileio package. In that case
it is the underlying implementation of write(). It's only called
"sys_write" because it came from the BSD kernel.

Jifl
-- 
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine
Come to the Red Hat TechWorld open source conference in Brussels!
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