[x] u t. n y Execute as task Conjunction
No rank -- the result is a verb with infinite rank
i. t. ''"0 i. 5 ++-+---+-----+-------+ ||0|0 1|0 1 2|0 1 2 3| ++-+---+-----+-------+
[x] u t. n y runs ([x] <@:u y) in an idle thread and returns its result, which is a pyx. A pyx is a special box. It looks like an atomic box and can be used like any other box. When the pyx is opened, the opening thread will block until the value is available. If the creation of the pyx ended in error, that error will be signaled when the pyx is opened.
The n argument to t. controls execution of the task. The format is
[[<]important parameters][,< keyword[;value]]...
No important parameters have been defined: that field should be omitted or empty.
One keyword has been defined.
The worker keyword controls whether the task should be executed in the originating thread if there is no waiting thread for it to run in.
u t. 'worker' u t. (<'worker') u t. ('worker';1)
all indicate that the task should always be run in a worker thread if there is one. If the keyword is omitted, a value of 0 is used. If the value is omitted, a value of 1 is used
Note that local variables are not shared between threads. So any definitions used should be defined globally. (In the J904 beta-d, this includes the definition of
example t. '', the thread gets the name of
u which in this case is
example and if that name is not defined in that thread, you get a value error.)
Threads and Tasks (T.)