Packages

sealed trait Semaphore extends Serializable

An asynchronous semaphore, which is a generalization of a mutex. Semaphores have a certain number of permits, which can be held and released concurrently by different parties. Attempts to acquire more permits than available result in the acquiring fiber being suspended until the specified number of permits become available.

If you need functionality that Semaphore doesnt' provide, use a TSemaphore and define it in a zio.stm.ZSTM transaction.

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Abstract Value Members

  1. abstract def available(implicit trace: Trace): UIO[Long]

    Returns the number of available permits.

  2. abstract def withPermit[R, E, A](zio: ZIO[R, E, A])(implicit trace: Trace): ZIO[R, E, A]

    Executes the specified workflow, acquiring a permit immediately before the workflow begins execution and releasing it immediately after the workflow completes execution, whether by success, failure, or interruption.

  3. abstract def withPermitScoped(implicit trace: Trace): ZIO[Scope, Nothing, Unit]

    Returns a scoped workflow that describes acquiring a permit as the acquire action and releasing it as the release action.

  4. abstract def withPermits[R, E, A](n: Long)(zio: ZIO[R, E, A])(implicit trace: Trace): ZIO[R, E, A]

    Executes the specified workflow, acquiring the specified number of permits immediately before the workflow begins execution and releasing them immediately after the workflow completes execution, whether by success, failure, or interruption.

  5. abstract def withPermitsScoped(n: Long)(implicit trace: Trace): ZIO[Scope, Nothing, Unit]

    Returns a scoped workflow that describes acquiring the specified number of permits and releasing them when the scope is closed.

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
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  2. final def ##: Int
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  3. final def ==(arg0: Any): Boolean
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  4. final def asInstanceOf[T0]: T0
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  5. def awaiting(implicit trace: Trace): UIO[Long]

    Returns the number of tasks currently waiting for permits.

    Returns the number of tasks currently waiting for permits. The default implementation returns 0.

  6. def clone(): AnyRef
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    protected[lang]
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    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  7. final def eq(arg0: AnyRef): Boolean
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  8. def equals(arg0: AnyRef): Boolean
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  9. final def getClass(): Class[_ <: AnyRef]
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    @native()
  10. def hashCode(): Int
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  11. final def isInstanceOf[T0]: Boolean
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  12. final def ne(arg0: AnyRef): Boolean
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  13. final def notify(): Unit
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    @native()
  14. final def notifyAll(): Unit
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  15. final def synchronized[T0](arg0: => T0): T0
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  16. def toString(): String
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  17. final def wait(): Unit
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    @throws(classOf[java.lang.InterruptedException])
  18. final def wait(arg0: Long, arg1: Int): Unit
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    @throws(classOf[java.lang.InterruptedException])
  19. final def wait(arg0: Long): Unit
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    @throws(classOf[java.lang.InterruptedException]) @native()

Deprecated Value Members

  1. def finalize(): Unit
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    @throws(classOf[java.lang.Throwable]) @Deprecated
    Deprecated

    (Since version 9)

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