Introduced classes

class ProcessorInfo

mpi :: ProcessorInfo

Simple class transfered between processors

Redefined classes

redef abstract class Deserializer

mpi :: mpi_simple $ Deserializer

Abstract deserialization service
redef class Sys

mpi :: mpi_simple $ Sys

The main class of the program.

All class definitions

redef abstract class Deserializer

mpi :: mpi_simple $ Deserializer

Abstract deserialization service
class ProcessorInfo

mpi $ ProcessorInfo

Simple class transfered between processors
redef class Sys

mpi :: mpi_simple $ Sys

The main class of the program.
package_diagram mpi::mpi_simple mpi_simple mpi mpi mpi::mpi_simple->mpi c c mpi->c json json mpi->json ...c ... ...c->c ...json ... ...json->json a_star-m a_star-m a_star-m->mpi::mpi_simple


module abstract_collection

core :: abstract_collection

Abstract collection classes and services.
module abstract_text

core :: abstract_text

Abstract class for manipulation of sequences of characters
module array

core :: array

This module introduces the standard array structure.
module bitset

core :: bitset

Services to handle BitSet
module bytes

core :: bytes

Services for byte streams and arrays
module c

c :: c

Structures and services for compatibility with the C language
module caching

serialization :: caching

Services for caching serialization engines
module circular_array

core :: circular_array

Efficient data structure to access both end of the sequence.
module codec_base

core :: codec_base

Base for codecs to use with streams
module codecs

core :: codecs

Group module for all codec-related manipulations
module collection

core :: collection

This module define several collection classes.
module core

core :: core

Standard classes and methods used by default by Nit programs and libraries.
module engine_tools

serialization :: engine_tools

Advanced services for serialization engines
module environ

core :: environ

Access to the environment variables of the process
module error

json :: error

Intro JsonParseError which is exposed by all JSON reading APIs
module error

core :: error

Standard error-management infrastructure.
module exec

core :: exec

Invocation and management of operating system sub-processes.
module file

core :: file

File manipulations (create, read, write, etc.)
module fixed_ints

core :: fixed_ints

Basic integers of fixed-precision
module fixed_ints_text

core :: fixed_ints_text

Text services to complement fixed_ints
module flat

core :: flat

All the array-based text representations
module gc

core :: gc

Access to the Nit internal garbage collection mechanism
module hash_collection

core :: hash_collection

Introduce HashMap and HashSet.
module inspect

serialization :: inspect

Refine Serializable::inspect to show more useful information
module iso8859_1

core :: iso8859_1

Codec for ISO8859-1 I/O
module json

json :: json

Read and write JSON formatted text using the standard serialization services
module kernel

core :: kernel

Most basic classes and methods.
module list

core :: list

This module handle double linked lists
module math

core :: math

Mathematical operations
module meta

meta :: meta

Simple user-defined meta-level to manipulate types of instances as object.
module native

core :: native

Native structures for text and bytes
module numeric

core :: numeric

Advanced services for Numeric types
module parser_base

parser_base :: parser_base

Simple base for hand-made parsers of all kinds
module poset

poset :: poset

Pre order sets and partial order set (ie hierarchies)
module protocol

core :: protocol

module queue

core :: queue

Queuing data structures and wrappers
module range

core :: range

Module for range of discrete objects.
module re

core :: re

Regular expression support for all services based on Pattern
module ropes

core :: ropes

Tree-based representation of a String.
module safe

serialization :: safe

Services for safer deserialization engines
module serialization

serialization :: serialization

General serialization services
module serialization_core

serialization :: serialization_core

Abstract services to serialize Nit objects to different formats
module serialization_read

json :: serialization_read

Services to read JSON: deserialize_json and JsonDeserializer
module serialization_write

json :: serialization_write

Services to write Nit objects to JSON strings: serialize_to_json and JsonSerializer
module sorter

core :: sorter

This module contains classes used to compare things and sorts arrays.
module static

json :: static

Static interface to read Nit objects from JSON strings
module stream

core :: stream

Input and output streams of characters
module text

core :: text

All the classes and methods related to the manipulation of text entities
module time

core :: time

Management of time and dates
module union_find

core :: union_find

union–find algorithm using an efficient disjoint-set data structure
module utf8

core :: utf8

Codec for UTF-8 I/O


module mpi

mpi :: mpi

Implementation of the Message Passing Interface protocol by wrapping OpenMPI


module a_star-m


module mpi_simple is example

import mpi

# Simple class transfered between processors
class ProcessorInfo

	var rank: Int
	var size: Int
	var name: String
	var string_of_random_length: String

	init(mpi: MPI)
		self.rank = comm_world.rank.to_i
		self.size = comm_world.size = mpi.processor_name
		self.string_of_random_length = "+" * 10.rand

	redef fun to_s do return "<{name}: {rank}/{size} {string_of_random_length}>"

var mpi = new MPI

var data = new CIntArray(2)
if comm_world.size == 1 then
	print "not enough nodes, got only 1"
	exit 1

print "stdout: processor '{mpi.processor_name}' {comm_world.rank}/{comm_world.size}"

if comm_world.rank == 0.rank then
	# send - ints
	data[0] = 123
	data[1] = 456
	mpi.send_from(data, 0, 2, 1.rank, 0.tag, comm_world)

	# send - simple string
	mpi.send_all("Hello", 1.rank, 0.tag, comm_world)
	mpi.send_from(" World", 0, 6, 1.rank, 0.tag, comm_world)
	mpi.send_from("+-!0?", 2, 2, 1.rank, 0.tag, comm_world)
else if comm_world.rank == 1.rank then

	# recv - ints
	mpi.recv_into(data, 0, 2, 0.rank, 0.tag, comm_world)
	print "received data: {data[0]} {data[1]}"

	# recv - simple string
	var buf = new FlatBuffer.with_capacity(5)
	mpi.recv_fill(buf, 0.rank, 0.tag, comm_world)
	print "received string: {buf}"

	mpi.recv_into(buf, 5, 6, 0.rank, 0.tag, comm_world)
	print "received string: {buf}"

	mpi.recv_into(buf, 3, 2, 0.rank, 0.tag, comm_world)
	print "received string: {buf}"

# Passing complex objects and inverse sender/receiver
if comm_world.rank == 0.rank then
	var errors = 0
	var processors_per_host = new HashMap[String, Int]

	# recv - serializable
	for p in [1 .. comm_world.size[ do
		var a = mpi.recv(new Rank.any, 0.tag, comm_world)
		print "received serialized: {a or else "<null>"}"

		if a != null and a isa ProcessorInfo then
			if not processors_per_host.keys.has( then
				processors_per_host[] = 1
			else processors_per_host[] += 1
		else errors += 1

	print "errors: {errors}"
	print "processors: {processors_per_host.join(", ", ": ")}"
	# send - serializable
	srand_from comm_world.rank.to_i
	var a = new ProcessorInfo(mpi)
	mpi.send(a, 0.rank, 0.tag, comm_world)