def isend( array, destination, tag, communicator ):
datatype = getMpiType(array)
size = nm.size( array )
shape = nm.shape( array )
rank = nm.rank( array )
request = core.isend( datatype, 1, core.MPI_INT, destination, tag, communicator )
request = core.isend( rank, 1, core.MPI_INT, destination, tag+1, communicator )
request = core.isend( shape, rank, core.MPI_INT, destination, tag+2, communicator )
request = core.isend( size, 1, core.MPI_INT, destination, tag+3, communicator )
return core.send( array, size, datatype, destination, tag+4, communicator )
def isend(message, destination, tag=0, comm=core.MPI_COMM_WORLD):
"""
request = comm.isend( message, destination[, tag(defaults to 0)])
Sends message to destination with tag (default tag is 0).
This is a NON-Blocking send, meaning this process will not wait for the data if it is not
yet ready. The call will immediately return a request object.
"""
messageType = getMessageType( message )
core.isend( messageType, 1, core.MPI_INT, destination, tag, comm )
if messageType == SINGLE: #single elements (integers, characters)
print "Single Element Case:"
dataType = getSingleType( message )
core.isend( dataType, 1, core.MPI_INT, destination, tag+1, comm )
returnvalue = core.isend( message, 1, dataType, destination, tag+2, comm )
elif messageType == SEQUENCE: #non-array sequences
print "Sequence Case:"
dataType = getSequenceType( message )
dataType = int(core.isend( dataType, 1, core.MPI_INT, destination, tag+1, comm ))
length = int(core.isend( len(message), 1, core.MPI_INT, destination,tag+2, comm))
returnvalue = core.isend( message, length, dataType, destination, tag+3, comm )
elif messageType == ARRAY:
print "Array Case:"
returnvalue = array.isend(message, destination, tag+1, comm )
else: #object case
print "Generic Object Case:"
returnvalue = sobj.isend( message, destinaion, tag+1, comm )# (2) are the same
return returnvalue
def isend( buffer, count, datatype, destination, tag, comm ):
"""
request = isend(buffer, count, datatype, destination, tag, communicator)
Send 'buffer', which consists of 'count' elements of type 'datatype',
to the processor in 'comm' that has rank 'destination' and is waiting
for a message with tag == 'tag'.
Buffer: Can be a single numeric value or a numeric array.
Count: Number of elements in an array, or 1 for scalar data.
Datatype: One of a few type constants defined in the mpi module.
Destination: Rank in the specified communicator to send this message to.
Tag: An arbitrary value used to route messages more precisely.
Tags are often ignored (especially in simpler programs). If
you don't care what the tag is use: MPI_ANY_TAG
Comm: The communicator that contains 'destination'
Request: Request is an integer that represents this nonblocking
send operation. You use this handle to check on the status of this
isend by calling functions like test() and wait().
Example:
request = send( Numeric.ones(10), 10, MPI_INT, 1, 7, MPI_COMM_WORLD )
if ( test( request ) ):
print 'Send complete!'
# Wait for the send to complete before proceeding:
wait( request )
"""
#raise NotImplementedError,"Non-Blocking I/O does not work(yet)"
id = core.isend( buffer, count, datatype, destination, tag, comm )
request = Request( "send", id, buffer, count, datatype, destination, tag, comm )
return request
