Fork_of_P1137_futures.php
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	hach-que
	May 14 2014, 10:48 PM

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Fork_of_P1137_futures.php
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	#!/usr/bin/env php
	<?php

	$root = dirname(dirname(dirname(__FILE__)));
	require_once $root.'/scripts/__init_script__.php';

	$number_of_tasks = 10;

	$number_wait = array(5, 5, 5, 5, 1, 1, 1, 1, 1, 1);
	$process_wait = array(3, 3, 3, 3, 3, 0, 0, 0, 0, 0);

	$futures = array();
	for ($ii = 0; $ii < $number_of_tasks; $ii++) {
	$amount = $number_wait[$ii];
	echo "sleep ".$amount."\n";
	$futures[$ii] = new ExecFuture('sleep %d', $amount);
	}

	echo "[T = ".t()."] Starting 10 tasks.\n";
	foreach (Futures($futures)->limit(4) as $ii => $future) {
	if ($process_wait[$ii] > 0) {
	echo "wait ".$process_wait[$ii]."\n";
	$st = microtime(true);
	while (microtime(true) - $st < $process_wait[$ii]) {
	sleep(microtime(true) - $st);
	}
	}
	echo "[T = ".t()."] Completed a task.\n";
	}

	echo "[T = ".t()."] Done.\n";


	function t() {
	static $start;
	if (!$start) {
	$start = microtime(true);
	}

	return sprintf('%.1f', microtime(true) - $start);
	}