Re: [Icewing-devel] iceWing 0.11 release planing

[Ingo L. <ilu...@te...>]

Hiya,

Am 09/09/2012 11:40 PM, schrieb Frank Lömker:
> Regarding the implementation after thinking a bit more about it:
> What about using only the char* and no enum. Two variables which
> encode the same information is always a bit ugly and cumbersome. The
> speed advantage of the enum, no strcmp needed, can be retained with
> something like:
>
>      #define IW_TYPE_IMAGE     "IW01 iwImage"
>      #define IW_TYPE_GRABIMAGE "IW02 grabImageData"
>      #define IW_TYPE_STRING    "IW03 char*"

Okay, nice one. Lets do it like that.

>      typedef struct plugData {
>          ...
>          char type[20]; /* Not sure if char* or char[] is better: */
>      } plugData;        /*   No malloc, no dereference <> arbitrary length */
>
>      char *t = ...;
>      if (*(int*)t == *(int*)IW_TYPE_IMAGE)
> 	printf ("%s\n", IW_TYPE_IMAGE);
>      else if (*(int*)t == *(int*)IW_TYPE_GRABIMAGE)
> 	printf ("%s\n", IW_TYPE_GRABIMAGE);
>      else
> 	printf ("Unknown %s\n", t);

A couple of macros would probably be useful here, to reduce the clutter 
with all those casts, but thats for later.


> Checked it the first time since a while. Exiting the receiver side was
> buggy (bit rotting...). And the default "max number of distributed items"
> was IMHO too low, which resulted in too fast locks with already simple
> examples. The current head version should work better. At least the
> following examples work for me:
>
> 1: Distribute images to two other instances, which then process the
>     images with the sysiphus plugin:
>
>      icewing -sp *png -l shmdata -a shmData1 "-p iw2 -g image"
>      icewing -l shmdata -a shmData1 "-p iw2 -o image" -l sysiphus
>      icewing -l shmdata -a shmData1 "-p iw2 -o image" -l sysiphus
>
> 2: Distribute images to two other instances, process them there with
>     sysiphus, and send one result back to the first instance where it is
>     further processed with sysiphus:
>
>      icewing -sp *png -l shmdata -a shmData1 "-n 3 -p iw2 -g image" -l shmdata -a shmData2 "-p iw3 -o image2 -b" -l sysiphus -a Sysiphus1 "-i image2"
>      icewing -l shmdata -a shmData1 "-p iw2 -o image" -l sysiphus
>      icewing -l shmdata -a shmData1 "-p iw2 -o image" -l sysiphus -l shmdata -a shmData2 "-n 3 -p iw3 -g sysiphus"

Nice! I'll pass that on :-)

cheers
-- 
Dr.-Ing. Ingo Lütkebohle
fon: +49-521-106-12206
http://aiweb.techfak.uni-bielefeld.de/user/ingo-lutkebohle