Hi Mariano,
it is supossed to be Posix, but Posix.1, it's another revision.
Since Solaris 10, it is supposed to supports all extensions of Posix (
http://docs.oracle.com/cd/E19253-01/816-5175/standards-5/index.html) and
Irix 6 (is discontinued, and is not Posix.1 compatible)
Also I can say that the GHC (Haskell) implementation assumes the value 1
for the constant, you can check the source code in:
https://hackage.haskell.org/package/posix-waitpid-0.1/docs/src/System-Posix-Waitpid.html#c_waitpid
I think is enough safe to have the 1 as a constant, if not you will have to
generate a plugin for every platform.
The other alternative is to read the constant value from the C Header, but
is maybe an overkill.
Chers,
Pd: hace rato que estoy por aca, pero me cuesta responder, a veces va muy
rapido y otras vuelan muy alto :).
On Tue, Dec 22, 2015 at 5:36 PM, Mariano Martinez Peck <
[email protected]> wrote:
>
>
> On Tue, Dec 22, 2015 at 5:24 PM, [email protected] <[email protected]>
> wrote:
>
>> Hello Mariano,
>> WNOHANG is a constant is defined in sys/wait.h, after the
>> compilation is not included in the object file.
>>
>> You will have to duplicate its value in the Smalltalk Code. It's value is
>> 1, in linux is defined in bits/waitflags.h as
>>
>> #define WNOHANG 1
>>
>>
> mmmmmm but then I would need to take care about its different values in
> different OS right?
> I am reading for example this thread:
> https://groups.google.com/forum/#!topic/comp.lang.python/_5rCpfYR_ZE
>
> sunos 4.1.3 : #define WNOHANG 1
> Solaris 2.4 : #define WNOHANG 0100
> OSF1 2.0 : #define WNOHANG 0x1
> Ultrix 4.4 : #define WNOHANG 1
> irix 4.0.5C : #define WNOHANG 0x1
> irix 5.2 : #define WNOHANG 0100
> irix 6.0.1 : #define WNOHANG 0100
>
> OK..the thread is from 1995... I thought the POSIX standard would
> standardize that...
>
> I am now checking at
> /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/sys/wait.h
>
> and it says:
>
> #define WNOHANG 0x00000001
> But again..I wonder how portable is to stick to that...
>
> Ok...maybe I will need to go with a VM primitive as #primGetChildExitStatus:
> that way I can do the:
>
> self cCode: 'waitpid ( pidToHandle, &exitStatus, WNOHANG )' inSmalltalk:
> [ exitStatus := -1 ].
>
>
> pd: que groso Pablito verte por aca!!!!
>
>
>
>> Cheers,
>> Pablo
>>
>> On Tue, Dec 22, 2015 at 5:12 PM, Mariano Martinez Peck <
>> [email protected]> wrote:
>>
>>> Hi guys,
>>>
>>> Say I want to call to waitpid like this:
>>>
>>> waitpid(childID, &status, WNOHANG);
>>>
>>> How can I do since I don't have access to WNOHANG int value in order to
>>> send it via argument .... ???
>>>
>>> Any idea?
>>>
>>> Thanks in advance,
>>>
>>> --
>>> Mariano
>>> http://marianopeck.wordpress.com
>>>
>>
>>
>>
>> --
>> Pablo Tesone.
>> [email protected]
>>
>
>
>
> --
> Mariano
> http://marianopeck.wordpress.com
>
--
Pablo Tesone.
[email protected]
