about summary refs log blame commit diff stats
path: root/channel.mu
blob: bc6ee44ccaaac45aca6413351da9cee003a34c8b (plain) (tree)
1
2
3
4
5
6
7
8
9

                                                                
                 
                                          
             

                                         
                       
   

                                     
                                                  
                             
 

                                         
        
   
 
 

                                             
             


                                         
                                                  
                                                  
                                       

        
   
 
 
             
             
                                       
                                                                  

                                                           

                           
 
# example program: communicating between routines using channels

recipe producer [
  # produce characters 1 to 5 on a channel
  local-scope
  chan:address:channel <- next-ingredient
  # n = 0
  n:character <- copy 0
  {
    done?:boolean <- lesser-than n, 5
    break-unless done?
    # other threads might get between these prints
    $print [produce: ], n, [ 
]
    chan:address:channel <- write chan, n
    n <- add n, 1
    loop
  }
]

recipe consumer [
  # consume and print integers from a channel
  local-scope
  chan:address:channel <- next-ingredient
  {
    # read an integer from the channel
    n:character, chan:address:channel <- read chan
    # other threads might get between these prints
    $print [consume: ], n:character, [ 
]
    loop
  }
]

recipe main [
  local-scope
  chan:address:channel <- new-channel 3
  # create two background 'routines' that communicate by a channel
  routine1:character <- start-running producer:recipe, chan
  routine2:character <- start-running consumer:recipe, chan
  wait-for-routine routine1
  wait-for-routine routine2
]