package ocaml-base-compiler
val make : int -> t
make n
returns a new counting semaphore, with initial value n
. The initial value n
must be nonnegative.
val release : t -> unit
release s
increments the value of semaphore s
. If other threads are waiting on s
, one of them is restarted. If the current value of s
is equal to max_int
, the value of the semaphore is unchanged and a Sys_error
exception is raised to signal overflow.
val acquire : t -> unit
acquire s
blocks the calling thread until the value of semaphore s
is not zero, then atomically decrements the value of s
and returns.
val try_acquire : t -> bool
try_acquire s
immediately returns false
if the value of semaphore s
is zero. Otherwise, the value of s
is atomically decremented and try_acquire s
returns true
.
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