Condition block execution of a thread



superclass: Object



*new(test) create a new instance, set the test variable.

test return the test variable (boolean)

wait wait until the condition is true and signalled

hang(val) wait for val time, regardless of test

signal if test is true, reschedule blocked threads

unhang resume threads





// example



(

c = Condition.new(false);


Routine {

1.wait;

"waited for 1 second".postln;

1.wait;

"waited for another second, now waiting for you ... ".postln;

c.wait;

"the condition has stopped waiting.".postln;

1.wait;

"waited for another second".postln;

"waiting for you ... ".postln;

c.test = false;

c.wait;

"the condition has stopped waiting.".postln;

1.wait;

"the end".postln;

}.play; 

)


// continue

(

c.test = true;

c.signal;

)


// a typical use is a routine that can pause under certin conditions:

(

c = Condition.new;

fork { loop { 1.wait; "going".postln; c.wait } };

)

c.test = true; c.signal;

c.test = false;




// the same, using hang


(

c = Condition.new;


Routine {

1.wait;

"waited for 1 second".postln;

1.wait;

"waited for another second, now waiting for you ... ".postln;

c.hang;

"the condition has stopped waiting.".postln;

1.wait;

"waited for another second".postln;

"waiting for you ... ".postln;

c.hang;

"the condition has stopped waiting.".postln;

}.play; 

)


// continue

c.unhang;



Berlin: clubs bars cafes nightlife going out