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Task

Task(func)

Create a Task (i.e. thread, or coroutine) to execute the given function (which must be callable with no arguments). The task exits when this function returns.

Examples

1. Create a basic task:

   julia> task1 = Task(() -> println("Executing task 1"))
   Task (runnable) @0x00007f8a8a8a8a8a
   
   julia> schedule(task1)

   This example creates a Task that executes a function that prints a message. The schedule function is used to schedule and start the task.

2. Create a task with a custom function:

   julia> function myfunction()
             println("Executing custom function")
         end
   
   julia> task2 = Task(myfunction)
   Task (runnable) @0x00007f8a8b8b8b8b
   
   julia> schedule(task2)

   In this example, a custom function myfunction is defined and a task task2 is created using that function. The schedule function is then used to start the task.

3. Handle task completion:

   julia> function task_completed(task)
             println("Task completed")
         end
   
   julia> task3 = Task(() -> println("Executing task 3"))
   Task (runnable) @0x00007f8a8c8c8c8c
   
   julia> oncompletion(task3, task_completed)
   
   julia> schedule(task3)

   This example demonstrates how to handle task completion using the oncompletion function. The task_completed function is executed when task3 completes.

Common mistake example:

julia> mytask = Task(42)
ERROR: MethodError: no method matching Task(::Int64)

In this example, a mistake is made by passing an integer (42) instead of a callable function to the Task constructor. The argument to Task should be a function that can be called with no arguments.

See Also

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