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#### 6.24 psb_get_overlap — Extract list of overlap elements

    call psb_get_overlap(ovrel, desc, info)

Type:
  Asynchronous.
On Entry
desc
  the communication descriptor.
  Scope:local.
  Type:required.
  Intent: in.
  Specified as: a structured data of type psb_desc_type.

On Return
ovrel
  The list of overlap elements on the calling process, in local numbering.
  Scope: local
  Type: required
  Intent: out.
  Specified as: a rank one array with the ALLOCATABLE attribute, of type integer.
info
  Error code.
  Scope: local
  Type: required
  Intent: out.
  An integer value; 0 means no error has been detected.

Notes

1. If there are no overlap elements the output vector is set to the “not allocated” state.
2. Otherwise the size of ovrel will be exactly equal to the number of overlap elements.

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