psb_bcast — Broadcast data

call psb_bcast(ctxt, dat [, root, mode, request])

This subroutine implements a broadcast operation based on the underlying communication library.

Type:: Synchronous.
On Entry
ctxt: the communication context identifying the virtual parallel machine.
Scope: global.
Type: required.
Intent: in.
Specified as: an integer variable.
dat: On the root process, the data to be broadcast.
Scope: global.
Type: required.
Intent: inout.
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 variable, which may be a scalar or rank 1 array. Type, kind, rank and size must agree on all processes.
root: Root process holding data to be broadcast.
Scope: global.
Type: optional.
Intent: in.
Specified as: an integer value 0 <= root <= np - 1, default 0
mode: Whether the call is started in non-blocking mode and completed later, or is executed synchronously.
Scope: global.
Type: optional.
Intent: in.
Specified as: an integer, with the value determined by the bitwise OR of psb_collective_start_, psb_collective_end_. Default: both fields are selected (i.e. require synchronous completion).
request: A request variable to check for operation completion.
Scope: local.
Type: optional.
Intent: inout.
If mode does not specify synchronous completion, then this variable must be present.

On Return
dat: On all processes other than root, the broadcasted data.
Scope: global.
Type: required.
Intent: inout.
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, rank and size must agree on all processes.
request: A request variable to check for operation completion.
Scope: local.
Type: optional.
Intent: inout.
If mode does not specify synchronous completion, then this variable must be present.