multitasking 2.5.0

Cooperative multitasking using asynchronous tasks and synchronization primitives, with the ability to safely cancel groups of nested tasks performing I/O wait or listen operations.

Changelog

2.5.0

• Slightly improved BinarySemaphore performance.
• Slightly improved ReentrantLock performance.
• Changed example example_task_cancel_long_network.dart.
• Changed example example_task_cancel_network.dart.
• Changed example example_task_cancel_await_for_stream_emulation.dart.
• Breaking change: Removed Task.awaitFor method.
• Added class ForEach.

2.4.0

• Breaking change: Removed type parameter from ReentrantLock class.

2.3.0

• Added table of contents in file README.md.
• Added class ReentrantLock.
• Added example example_reentrant_lock.dart.

2.2.0

• Added an explanation of the operating principle and internal structure of the task.
• Changed package description.
• A unified mechanism for implementing a waiting queue has been added (WaitQueue).
• Breaking change:The signatures of some synchronization primitives have been changed to consistently use wait queues. This applies to methods that implement waiting with a timeout (tryWait()).

2.1.0

• Added example example_counting_semaphore.dart.
• Added example example_task_cancel_await_for_stream.dart.
• Added method static Task<void> awaitFor<R>(Stream<R> stream, CancellationToken token, bool Function(R) f).
• Added class CountingSemaphore.
• Added class: BinarySemaphore.
• Breaking change: The functionality of the CancellationToken handler has been changed. Performance and usability have been improved, and most importantly, the restriction on linking to a single task has been lifted.
• Added example example_task_cancel_during_sleep.dart.
• Added example example_binary_semaphore.dart.
• Added class Synchronizer.
• Added class ConditionVariable.
• Added example example_condition_variable.dart.

2.0.0

• Breaking change: Removed support for unsafe task termination.
• Added support for safe task cancellation.

1.2.0

• Minor corrections have been made to the examples.

1.1.0

• Fixed a bug that did not take into account that in Dart, a function cannot return a Future<Future<T>> result. Dart automatically flattens this value to Future<T>.
• Changed signature of the following methods in the Task class: Future<Task<T>> run(), Future<void> start() to Task<T> run(), void start(). First method (run) was changed because Dart blocks Future<Task<T>> Task<T>.run) until the task completes, the second method (start) was changed to be consistent with the first.

1.0.0

• Initial release.