:@sync

@sync

Wait until all dynamically-enclosed uses of @async, @spawn, @spawnat and @parallel are complete. All exceptions thrown by enclosed async operations are collected and thrown as a CompositeException.

Examples

Wait for completion of async operations:
```
julia> @sync begin
           @async println("Task 1")
           @async println("Task 2")
           @async println("Task 3")
       end
Task 1
Task 2
Task 3
```
In this example, the @sync macro is used to wait until all the enclosed @async tasks are complete before continuing execution. The output will show the tasks executed in order.

Handle exceptions from async operations:

julia> try
           @sync begin
               @async throw(ErrorException("Async Error 1"))
               @async throw(ErrorException("Async Error 2"))
           end
       catch ex
           println("Caught exception: ", ex)
       end
Caught exception: CompositeException(ErrorException("Async Error 1"), ErrorException("Async Error 2"))

In this example, the @sync macro is used to wait for the completion of the enclosed @async tasks. If any of the enclosed tasks throw an exception, the exceptions are collected and thrown as a CompositeException. The catch block can be used to handle the collected exceptions.

Synchronize parallel computations:
```
julia> @sync @parallel for i in 1:10
           println("Iteration: ", i)
       end
Iteration: 1
Iteration: 2
Iteration: 3
Iteration: 4
Iteration: 5
Iteration: 6
Iteration: 7
Iteration: 8
Iteration: 9
Iteration: 10
```
In this example, the @sync macro is used in conjunction with @parallel to synchronize the parallel execution of a loop. The @sync ensures that all iterations of the loop are completed before continuing.

Common mistakes example:

julia> @sync begin
           @async println("Task 1")
           println("Task 2")
       end
ERROR: `@async` is not allowed inside non-`Task` context

In this example, the @async macro is used outside the @sync block. The @async macro is only allowed inside @sync, @parallel, or other Task-related contexts. Ensure that @async is used within the appropriate context to avoid this error.

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:@sync

Examples

See Also

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