package async_extended

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in-package search v0.2.0

async_extended
- Async_extended
  - Any_error
    
    Applicative_infix
  - Async_cbreak
  - Async_color_print
  - Async_heap
  - Async_mutex
  - Coalesced_throttle
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    Stats
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  - Fd_leak_check
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    Update
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    Make
    
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    Applicative_infix
    
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  - Mailbox
    
    Filter
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    Let_syntax
    
    Let_syntax
    
    Open_on_rhs
    
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    S
  - Watcher

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The standard semaphore concept, with an async API.

type t

include sig ... end

val sexp_of_t : t -> Ppx_sexp_conv_lib.Sexp.t

include Async.Invariant.S with type t := t

val invariant : t Base__.Invariant_intf.inv

val create : int -> t

Create a simple counting semaphore, create initial_value is the inital value of the semaphore. Callers to decr will wait until the value is positive.

val value : t -> int

Get the current value of the semaphore

val incr : t -> unit

Increment the semaphore and if there are jobs sleeping on decr wakeup one of them.

val decr : t -> unit Async.Deferred.t

Decrement the sempahore. This blocks if resulting the semaphore value is negative.

val resource : t -> (unit, Core.Nothing.t) Resource.t

Interface to semaphore where the users can only return the tokens they took from semaphore, not add more tokens