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#### 7.16 psb_snd — Send data

    call psb_snd(ctxt, dat, dst, m)

This subroutine sends a packet of data to a destination.

Type:
  Synchronous: see usage notes.
On Entry
ctxt
  the communication context identifying the virtual parallel machine.
  Scope: global.
  Type: required.
  Intent: in.
  Specified as: an integer variable.
dat
  The data to be sent.
  Scope: local.
  Type: required.
  Intent: in.
  Specified as: an integer, real or complex variable, which may be a scalar, or a rank 1 or 2 array, or a character or logical scalar. Type, kind and rank must agree on sender and receiver process; if m is not specified, size must agree as well.
dst
  Destination process.
  Scope: global.
  Type: required.
  Intent: in.
  Specified as: an integer value 0 <= dst <= np - 1.
m
  Number of rows.
  Scope: global.
  Type: Optional.
  Intent: in.
  Specified as: an integer value 0 <= m <= size(dat,1).
  When dat is a rank 2 array, specifies the number of rows to be sent independently of the leading dimension size(dat,1); must have the same value on sending and receiving processes.

On Return

Notes

1. This subroutine implies a synchronization, but only between the calling process and the destination process dst.

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