(permits: number): Effect.Effect<Semaphore>Creates a Semaphore initialized with the specified total number of permits.
When to use
Use to create a semaphore inside Effect code for bounding concurrency with automatic or manual permit management.
Example (Creating a semaphore)
import { Effect, Semaphore } from "effect"
const program = Effect.gen(function*() {
const semaphore = yield* Semaphore.make(2)
const task = (id: number) =>
semaphore.withPermits(1)(
Effect.gen(function*() {
yield* Effect.log(`Task ${id} acquired permit`)
yield* Effect.sleep("1 second")
yield* Effect.log(`Task ${id} releasing permit`)
})
)
// Run 4 tasks, but only 2 can run concurrently
yield* Effect.all([task(1), task(2), task(3), task(4)])
})export const const make: (
permits: number
) => Effect.Effect<Semaphore>
Creates a Semaphore initialized with the specified total number of permits.
When to use
Use to create a semaphore inside Effect code for bounding concurrency with
automatic or manual permit management.
Example (Creating a semaphore)
import { Effect, Semaphore } from "effect"
const program = Effect.gen(function*() {
const semaphore = yield* Semaphore.make(2)
const task = (id: number) =>
semaphore.withPermits(1)(
Effect.gen(function*() {
yield* Effect.log(`Task ${id} acquired permit`)
yield* Effect.sleep("1 second")
yield* Effect.log(`Task ${id} releasing permit`)
})
)
// Run 4 tasks, but only 2 can run concurrently
yield* Effect.all([task(1), task(2), task(3), task(4)])
})
make = (permits: numberpermits: number): import EffectEffect.interface Effect<out A, out E = never, out R = never>The Effect interface defines a value that lazily describes a workflow or
job. The workflow requires some context R, and may fail with an error of
type E, or succeed with a value of type A.
When to use
Use when you need to represent a lazy, composable workflow that can require
services, fail with a typed error, or succeed with a typed value.
Details
Effect values model resourceful interaction with the outside world,
including synchronous, asynchronous, concurrent, and parallel interaction.
They use a fiber-based concurrency model, with built-in support for
scheduling, fine-grained interruption, structured concurrency, and high
scalability.
To run an Effect value, you need a Runtime, which is a type that is
capable of executing Effect values.
Effect<Semaphore> => import internalinternal.const sync: <A>(
thunk: LazyArg<A>
) => Effect.Effect<A>
constructor SemaphoreImpl(permits: number): SemaphoreImplSemaphoreImpl(permits: numberpermits))