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contest-internal

Задание для контеста Мастерской для go-разработчиков

Написать реализацию интерфейса Mutex

type Mutex interface {
	Lock()
	Unlock()

	// LockChannel возвращает канал блокировки -
	// вычитывание из канала приводит к блокировке мьютекса
	LockChannel() <-chan struct{}
}

в файле mutex_impl.go. В этом файле уже содержится конструктор

func New() Mutex {
	// TODO
	return ... 
}

с пустым телом. Нужно отдать в конструкторе реализацию мьютекса Mutex.

Типичное использование этого мьютекса

  1. Как обычный мьютекс
mu := contest.New()
mu.Lock()
// doing under lock
mu.Unlock()
  1. Как LockChannel мьютекс
ctx, cancel := context.WithTimeout(context.Background(). time.Second)
defer cancel()
select {
case <-ctx.Done():
	// nop
case <-mu.LockChannel():
	// doing under lock
	mu.Unlock()
}

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