[Chicken-janitors] #1134: with-input-from-pipe should be rewritten so it does not block

[Chicken Trac]

#1134: with-input-from-pipe should be rewritten so it does not block
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 Reporter:  ckeen                                            |       Owner:     
    
     Type:  enhancement                                      |      Status:  
new    
 Priority:  not urgent at all                                |   Milestone:  
someday
Component:  core libraries                                   |     Version:  
4.9.x  
 Keywords:  posix with-input-from-pipe pclose block threads  |  
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 The current implementation of with-input-from-pipe is straightforward and
 uses the underlying POSIX functions popen and pclose.

 However the usage of pclose will wait for the child process of the pipe to
 exit and thus will hang the whole chicken process.

 This gets in the way if threading is used.

 Therefore it should be implemented in a way that we explicitly wait for
 the SIGCHLD to arrive in the scheduler. Maybe a thread-wait-for-signal
 mechanism needs to be implemented.

 This will complicate a lot of things so I will put this on the back burner
 for now.

-- 
Ticket URL: <http://bugs.call-cc.org/ticket/1134>
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