Ocamlnet 4 Reference Manual : Netshm_array

# Module Netshm_array

    module Netshm_array: sig .. end

Arrays in shared memory

    type 'a t

    val manage : ?pagesize:int ->
           ?init:int ->
           'a ->
           'a Netshm_data.data_manager ->
           Netshm.locking_method -> Netshm.shm_descr -> 'a t

Manages a shared memory object as an array, including the representation of arbitrary O'Caml values. The first argument of type `'a` is the default value of the array elements.

This bases on `Netshm.manage`, and the arguments `pagesize`, `locking_method` and `shm_descr` are documented there.

If an empty memory object is managed, it is initialized as array with zero elements. If a non-empty memory object is managed, it must contain a valid array structure. The size of the array is then the same as when the array was managed the last time.

By passing `init` with argument `n`, the array is reinitialized as array with `n` elements containing the default value.

It is essential that the same data managers are passed as at the time when the array was initialized.

Arrays are implemented as `(int32, 'a) Netshm_hashtbl.t`.

    val length : 'a t -> int

Returns the length of the array

    val get : 'a t -> int -> 'a

`get a k`: Returns the contents of the array element number `k` where `0 <= k < length a`.

If you do `module Array = Netshm_array` in your code you can also use the notation `a.(k)`.

    val set : 'a t -> int -> 'a -> unit

`set a k x`: Sets the contents of the array element number `k` to `x` where `0 <= k < length a`.

If you do `module Array = Netshm_array` in your code you can also use the notation `a.(k) <- x`.

    val resize : 'a t -> int -> unit

`resize a n`: Resizes the array to length `n`. If the array is enlarged the new elements will be initialized to the default value.

    val default_value : 'a t -> 'a

Returns the default value

    val shm_table : 'a t -> Netshm.shm_table

Returns the underlying shared memory table used to implement hash tables