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chryan
#1 Posted : Sunday, November 28, 2010 11:06:27 PM(UTC)
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Hi, I was hoping to get some help regarding script reloading.
I would like my scripts to be reloaded on demand to allow for the scripts to be edited and 'refreshed' at runtime.
However, I can't seem to be able to unload the previous script and reloading the script still reflects the old one before editing.

Here is the code I've used:

Code:

// Loading the script.
int top = sq_gettop(vm);
if(SQ_SUCCEEDED(sqstd_loadfile(vm, file, true))) {
    sq_getstackobj(vm,-1,&obj);
    sq_addref(vm, &obj);
    sq_settop(vm,top);
}

// Run the script to register the functions
if(!sq_isnull(obj)) {
    int top = sq_gettop(vm);
    sq_pushobject(vm, obj);
    sq_pushroottable(vm);
    if(SQ_SUCCEEDED(sq_call(vm, 1, false, true))) {
        sq_settop(vm,top);
    }
}

// Unload the script
sq_release( vm, &obj );


I'm not sure if I'm doing anything wrong, but when I try to load the same file again after unloading, it still uses the old scripting code, as if I never reloaded it.

I would greatly appreciate any help or advice!
Thanks!

EDIT: Forgot to mention that I'm using Squirrel 2.2.4.
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fagiano
#2 Posted : Tuesday, November 30, 2010 7:05:42 AM(UTC)
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Hi, consider taht in squirrel both functions and classes are first class objects and they are refcounted.

So let's say I load this script(let's call it x.nut)

Code:

class X {
function PrintVersion()
{
  ::print("I'm the fist version 1");
}
}


then I run this code
Code:

MyGlobalInstanceOfX <- X();


then I run this code
Code:

MyGlobalInstanceOfX.PrintVersion();

this will print version 1

then I change x.nut like this and reloadit
Code:

class X {
function PrintVersion()
{
  ::print("I'm the fist version 2!!!");
}
}


then I run this
Code:

MyGlobalInstanceOfX.PrintVersion();

and it will still print version 1.

This is because MyGlobalInstanceOfX is referencing to a instance created with the old class(the old value of X). If now we would create a new instance of X, that would print "version 2". Classes,Instances and function behave just like data. Reloading a the script will assign a the new code to X but not touch previous instances that are referenced by some variable.

I hope this helps
Alberto
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chryan
#3 Posted : Friday, December 03, 2010 5:13:59 AM(UTC)
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Thanks for the info Alberto.

The only definitions in my script files are functions.
I'm currently not using any classes in those loaded script files.

Is there a way to undefine the previously loaded script functions?
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jeremy_c
#4 Posted : Thursday, January 05, 2012 7:09:18 PM(UTC)
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chryan wrote:
Thanks for the info Alberto.

The only definitions in my script files are functions.
I'm currently not using any classes in those loaded script files.

Is there a way to undefine the previously loaded script functions?


I also have this same question. Any thoughts?

Jeremy
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jeremy_c
#5 Posted : Friday, January 06, 2012 4:19:04 PM(UTC)
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I am not sure if this is a good idea or not, but what I am currently doing is:

Code:
sq_newtable(v);
sq_setroottable(v);


Then run my setup procedure again to redefine all the functions/methods/user code.

Jeremy
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fagiano
#6 Posted : Monday, January 09, 2012 1:43:36 AM(UTC)
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If it is that what you want, there isn't anything wrong in what you are doing.

Alberto
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