1Semaphore.Counting(3)            OCaml library           Semaphore.Counting(3)
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NAME

6       Semaphore.Counting - no description
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Module

9       Module   Semaphore.Counting
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Documentation

12       Module Counting
13        : sig end
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21       type t
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24       The type of counting semaphores.
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28       val make : int -> t
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31       make  n  returns  a new counting semaphore, with initial value n .  The
32       initial value n must be nonnegative.
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35       Raises Invalid_argument if n < 0
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40       val release : t -> unit
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43       release s increments the value of semaphore s .  If other  threads  are
44       waiting  on s , one of them is restarted.  If the current value of s is
45       equal to max_int , the value  of  the  semaphore  is  unchanged  and  a
46       Sys_error exception is raised to signal overflow.
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49       Raises Sys_error if the value of the semaphore would overflow max_int
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54       val acquire : t -> unit
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57       acquire  s  blocks the calling thread until the value of semaphore s is
58       not zero, then atomically decrements the value of s and returns.
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62       val try_acquire : t -> bool
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65       try_acquire s immediately returns false if the value of semaphore s  is
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67       quire s returns true .
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71       val get_value : t -> int
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74       get_value s returns the current value of semaphore  s  .   The  current
75       value  can be modified at any time by concurrent Semaphore.Counting.re‐
76       lease and Semaphore.Counting.acquire operations.  Hence, the  get_value
77       operation  is racy, and its result should only be used for debugging or
78       informational messages.
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84OCamldoc                          2021-07-22             Semaphore.Counting(3)