[plt-scheme] Synchronizing

Tue Apr 22 16:50:30 EDT 2003

See the web page:

  http://www.plt-scheme.org/anoncvs/

where you (presumably) read the instructions on installing the CVS
version.

Robby

At Tue, 22 Apr 2003 22:48:42 +0200, Katsmall the Wise wrote:
> ------------------------------------------------------------------------------
> Yes and no.
> I have it (installed today), but where are the manuals to download?
> 
> Robby Findler wrote:
> 
> >They are in the latest CVS version only. Do you have that one? Have you
> >downloaded the manuals?
> >
> >At Tue, 22 Apr 2003 22:45:10 +0200, Katsmall the Wise wrote:
> >  
> >
> >>------------------------------------------------------------------------------
> >>The help desk could not find channels. Can you be a bit more specific?
> >>
> >>Katsmall the Wise
> >>
> >>By the way, thanks for the fast responses!
> >>
> >>Robby Findler wrote:
> >>
> >>    
> >>
> >>> For list-related administrative tasks:
> >>> http://list.cs.brown.edu/mailman/listinfo/plt-scheme
> >>>
> >>>You should probably use channels instead. Have the many threads put
> >>>values into the channel and then have one thread takes values out of
> >>>the channel and draws them. (Channels are only in the latest CVS
> >>>version; in 203 use semaphores (and suffer))
> >>>
> >>>Robby
> >>>
> >>>At Tue, 22 Apr 2003 22:35:56 +0200, Katsmall the Wise wrote:
> >>> 
> >>>
> >>>      
> >>>
> >>>> For list-related administrative tasks:
> >>>> http://list.cs.brown.edu/mailman/listinfo/plt-scheme
> >>>>
> >>>>I would like to make a procedure, that may be called from many threads, 
> >>>>but if it is called from two threads at the same time it will block the 
> >>>>second one until the first one finishes, and then run it.
> >>>>
> >>>>I want this because I have many drawing procedures that merely add 
> >>>>something to a list, and appearantly some things get deleted because the 
> >>>>procedures are called at the same time.
> >>>>
> >>>>Is there a simple solution to this?
> >>>>
> >>>>Katsmall the Wise
> >>>>
> >>>>
> >>>>   
> >>>>
> >>>>        
> >>>>
> >>> 
> >>>
> >>>      
> >>>
> >>------------------------------------------------------------------------------
> >>The help desk could not find channels. Can you be a bit more specific?
> >>Katsmall the Wise
> >>By the way, thanks for the fast responses!
> >>Robby Findler wrote:
> >>
> >>  For list-related administrative tasks:
> >>
> >>  http://list.cs.brown.edu/mailman/listinfo/plt-scheme
> >>
> >>
> >>
> >>You should probably use channels instead. Have the many threads put
> >>
> >>values into the channel and then have one thread takes values out of
> >>
> >>the channel and draws them. (Channels are only in the latest CVS
> >>
> >>version; in 203 use semaphores (and suffer))
> >>
> >>
> >>
> >>Robby
> >>
> >>
> >>
> >>At Tue, 22 Apr 2003 22:35:56 +0200, Katsmall the Wise wrote:
> >>
> >>  
> >>
> >>  For list-related administrative tasks:
> >>
> >>  http://list.cs.brown.edu/mailman/listinfo/plt-scheme
> >>
> >>
> >>
> >>I would like to make a procedure, that may be called from many threads, 
> >>
> >>but if it is called from two threads at the same time it will block the 
> >>
> >>second one until the first one finishes, and then run it.
> >>
> >>
> >>
> >>I want this because I have many drawing procedures that merely add 
> >>
> >>something to a list, and appearantly some things get deleted because the 
> >>
> >>procedures are called at the same time.
> >>
> >>
> >>
> >>Is there a simple solution to this?
> >>
> >>
> >>
> >>Katsmall the Wise
> >>
> >>
> >>
> >>
> >>
> >>    
> >>
> >>
> >>
> >>
> >>  
> >>
> >>------------------------------------------------------------------------------
> >>    
> >>
> >
> >
> >  
> >
> 
> ------------------------------------------------------------------------------
> Yes and no.
> I have it (installed today), but where are the manuals to download?
> Robby Findler wrote:
> 
> They are in the latest CVS version only. Do you have that one? Have you
> 
> downloaded the manuals?
> 
> 
> 
> At Tue, 22 Apr 2003 22:45:10 +0200, Katsmall the Wise wrote:
> 
>   
> 
> ------------------------------------------------------------------------------
> 
> The help desk could not find channels. Can you be a bit more specific?
> 
> 
> 
> Katsmall the Wise
> 
> 
> 
> By the way, thanks for the fast responses!
> 
> 
> 
> Robby Findler wrote:
> 
> 
> 
>     
> 
>  For list-related administrative tasks:
> 
>  http://list.cs.brown.edu/mailman/listinfo/plt-scheme
> 
> 
> 
> You should probably use channels instead. Have the many threads put
> 
> values into the channel and then have one thread takes values out of
> 
> the channel and draws them. (Channels are only in the latest CVS
> 
> version; in 203 use semaphores (and suffer))
> 
> 
> 
> Robby
> 
> 
> 
> At Tue, 22 Apr 2003 22:35:56 +0200, Katsmall the Wise wrote:
> 
>  
> 
> 
> 
>       
> 
>  For list-related administrative tasks:
> 
>  http://list.cs.brown.edu/mailman/listinfo/plt-scheme
> 
> 
> 
> I would like to make a procedure, that may be called from many threads, 
> 
> but if it is called from two threads at the same time it will block the 
> 
> second one until the first one finishes, and then run it.
> 
> 
> 
> I want this because I have many drawing procedures that merely add 
> 
> something to a list, and appearantly some things get deleted because the 
> 
> procedures are called at the same time.
> 
> 
> 
> Is there a simple solution to this?
> 
> 
> 
> Katsmall the Wise
> 
> 
> 
> 
> 
>    
> 
> 
> 
>         
> 
> 
>  
> 
> 
> 
>       
> 
> ------------------------------------------------------------------------------
> 
> The help desk could not find channels. Can you be a bit more specific?
> 
> Katsmall the Wise
> 
> By the way, thanks for the fast responses!
> 
> Robby Findler wrote:
> 
> 
> 
>   For list-related administrative tasks:
> 
> 
> 
>   http://list.cs.brown.edu/mailman/listinfo/plt-scheme
> 
> 
> 
> 
> 
> 
> 
> You should probably use channels instead. Have the many threads put
> 
> 
> 
> values into the channel and then have one thread takes values out of
> 
> 
> 
> the channel and draws them. (Channels are only in the latest CVS
> 
> 
> 
> version; in 203 use semaphores (and suffer))
> 
> 
> 
> 
> 
> 
> 
> Robby
> 
> 
> 
> 
> 
> 
> 
> At Tue, 22 Apr 2003 22:35:56 +0200, Katsmall the Wise wrote:
> 
> 
> 
>   
> 
> 
> 
>   For list-related administrative tasks:
> 
> 
> 
>   http://list.cs.brown.edu/mailman/listinfo/plt-scheme
> 
> 
> 
> 
> 
> 
> 
> I would like to make a procedure, that may be called from many threads, 
> 
> 
> 
> but if it is called from two threads at the same time it will block the 
> 
> 
> 
> second one until the first one finishes, and then run it.
> 
> 
> 
> 
> 
> 
> 
> I want this because I have many drawing procedures that merely add 
> 
> 
> 
> something to a list, and appearantly some things get deleted because the 
> 
> 
> 
> procedures are called at the same time.
> 
> 
> 
> 
> 
> 
> 
> Is there a simple solution to this?
> 
> 
> 
> 
> 
> 
> 
> Katsmall the Wise
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
>     
> 
> 
> 
> 
> 
> 
> 
> 
> 
>   
> 
> 
> 
> ------------------------------------------------------------------------------
> 
>     
> 
> 
> 
> 
>   
> 
> ------------------------------------------------------------------------------