psb_cdins -- Communication descriptor insert routine

call psb_cdins(nz, ia, ja, desc_a, info)

This subroutine examines the edges of the graph associated with the discretization mesh (and isomorphic to the sparsity pattern of a linear system coefficient matrix), storing them as necessary into the communication descriptor.

Type:

Asynchronous.

On Entry

nz

the number of points being inserted.
Scope: local.
Type: required.
Intent: in.
Specified as: an integer value.

ia

the indices of the starting vertex of the edges being inserted.
Scope: local.
Type: required.
Intent: in.
Specified as: an integer array of length $nz$.

ja

the indices of the end vertex of the edges being inserted.
Scope: local.
Type: required.
Intent: in.
Specified as: an integer array of length $nz$.

On Return

desc_a

the updated communication descriptor.
Scope:local.
Type:required.
Intent: inout.
Specified as: a structured data of type descdatapsb_desc_type.

info

Error code.
Scope: local
Type: required
Intent: out.
An integer value; 0 means no error has been detected.

Notes

1. This routine may only be called if the descriptor is in the build state;
2. This routine automatically ignores edges that do not insist on the current process, i.e. edges for which neither the starting nor the end vertex belong to the current process.