final class RefM[A] extends Serializable
A mutable atomic reference for the IO
monad. This is the IO
equivalent of
a volatile var
, augmented with atomic effectful operations, which make it
useful as a reasonably efficient (if low-level) concurrency primitive.
Unlike Ref
, RefM
allows effects in atomic operations, which makes the
structure slower but more powerful than Ref
.
for { ref <- RefM(2) v <- ref.update(_ + putStrLn("Hello World!").attempt.unit *> IO.succeed(3)) _ <- putStrLn("Value = " + v) // Value = 5 } yield ()
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final
def
!=(arg0: Any): Boolean
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final
def
##(): Int
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final
def
==(arg0: Any): Boolean
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final
def
asInstanceOf[T0]: T0
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def
clone(): AnyRef
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final
def
eq(arg0: AnyRef): Boolean
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def
equals(arg0: Any): Boolean
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def
finalize(): Unit
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final
def
get: UIO[A]
Reads the value from the
Ref
. -
final
def
getClass(): Class[_]
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def
hashCode(): Int
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final
def
isInstanceOf[T0]: Boolean
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final
def
modify[R, E, B](f: (A) ⇒ ZIO[R, E, (B, A)]): ZIO[R, E, B]
Atomically modifies the
RefM
with the specified function, which computes a return value for the modification.Atomically modifies the
RefM
with the specified function, which computes a return value for the modification. This is a more powerful version ofupdate
. -
final
def
modifySome[R, E, B](default: B)(pf: PartialFunction[A, ZIO[R, E, (B, A)]]): ZIO[R, E, B]
Atomically modifies the
RefM
with the specified function, which computes a return value for the modification if the function is defined in the current value otherwise it returns a default value.Atomically modifies the
RefM
with the specified function, which computes a return value for the modification if the function is defined in the current value otherwise it returns a default value. This is a more powerful version ofupdateSome
. -
final
def
ne(arg0: AnyRef): Boolean
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final
def
notify(): Unit
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final
def
notifyAll(): Unit
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final
def
set(a: A): UIO[Unit]
Writes a new value to the
Ref
, with a guarantee of immediate consistency (at some cost to performance). -
final
def
setAsync(a: A): UIO[Unit]
Writes a new value to the
Ref
without providing a guarantee of immediate consistency. -
final
def
synchronized[T0](arg0: ⇒ T0): T0
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def
toString(): String
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final
def
update[R, E](f: (A) ⇒ ZIO[R, E, A]): ZIO[R, E, A]
Atomically modifies the
RefM
with the specified function, returning the value immediately after modification. -
final
def
updateSome[R, E](pf: PartialFunction[A, ZIO[R, E, A]]): ZIO[R, E, A]
Atomically modifies the
RefM
with the specified partial function.Atomically modifies the
RefM
with the specified partial function. if the function is undefined in the current value it returns the old value without changing it. -
final
def
wait(): Unit
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final
def
wait(arg0: Long, arg1: Int): Unit
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final
def
wait(arg0: Long): Unit
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