From a321c4cdae45892e2538e8bc0ec01e5965f46e02 Mon Sep 17 00:00:00 2001
From: Michael Wallner <mike@php.net>
Date: Fri, 8 Mar 2013 11:18:33 +0100
Subject: [PATCH 1/1] initial checkin

---
 lib/atick/Ticker.php           | 152 +++++++++++++++++++++++++++++++++
 tests/lib/atick/TickerTest.php |  69 +++++++++++++++
 tests/setup.inc                |   5 ++
 3 files changed, 226 insertions(+)
 create mode 100644 lib/atick/Ticker.php
 create mode 100644 tests/lib/atick/TickerTest.php
 create mode 100644 tests/setup.inc

diff --git a/lib/atick/Ticker.php b/lib/atick/Ticker.php
new file mode 100644
index 0000000..cdc3364
--- /dev/null
+++ b/lib/atick/Ticker.php
@@ -0,0 +1,152 @@
+<?php
+
+namespace atick;
+
+/**
+ * Asynchronnous resource handling, optionally (ab)using ticks
+ * 
+ * Example with ticks:
+ * <code>
+ * <?php
+ * declare(ticks=1);
+ *
+ * $conn = new \pq\Connection;
+ * $conn->execAsync("SELECT * FROM foo", function ($rs) {
+ *     var_dump($rs);
+ * });
+ * 
+ * $ticker = new \atick\Ticker;
+ * $ticker->register();
+ * $ticker->read($conn->socket, function($fd) use ($conn) {
+ *     $conn->poll();
+ *     if ($conn->busy) {
+ *         return false;
+ *     }
+ *     $conn->getResult();
+ *     return true;
+ * });
+ *
+ * while (count($ticker));
+ * ?>
+ * </code>
+ * 
+ * And an example without ticks:
+ * <code>
+ * <?php
+ * $conn = new \pq\Connection;
+ * $conn->execAsync("SELECT * FROM foo", function ($r) {
+ *     var_dump($r);
+ * });
+ * 
+ * $ticker = new \atick\Ticker;
+ * $ticker->read($conn->socket, function($fd) use ($conn) {
+ *     $conn->poll();
+ *     if ($conn->busy) {
+ *         return false;
+ *     }
+ *     $conn->getResult();
+ *     return true;
+ * });
+ * 
+ * while($ticker());
+ * ?>
+ * </code>
+ */
+class Ticker implements \Countable
+{
+	/**
+	 * @var array
+	 */
+	protected $read = array();
+	
+	/**
+	 * @var array
+	 */
+	protected $write = array();
+	
+	/**
+	 * Register the ticker as tick function
+	 * @return \atick\Ticker
+	 */
+	function register() {
+		register_tick_function(array($this, "__invoke"));
+		return $this;
+	}
+	
+	/**
+	 * Unregister the ticker as tick function
+	 * @return \atick\Ticker
+	 */
+	function unregister() {
+		unregister_tick_function(array($this, "__invoke"));
+		return $this;
+	}
+	
+	/**
+	 * The tick handler; calls atick\Ticker::wait(0)
+	 * @return int
+	 */
+	function __invoke() {
+		return $this->wait(0);
+	}
+	
+	/**
+	 * Wait for read/write readiness on the watched fds
+	 * @param float $timeout
+	 * @return int count of wached fds
+	 */
+	function wait($timeout = 1) {
+		$r = $w = $e = array();
+		foreach ($this->read as $s) {
+			$r[] = $s[0];
+		}
+		foreach ($this->write as $s) {
+			$w[] = $s[0];
+		}
+		$s = (int) $timeout;
+		$u = (int) (($timeout - $s) * 1000000);
+		if (($r || $w) && stream_select($r, $w, $e, $s, $u)) {
+			foreach ($r as $s) {
+				if ($this->read[(int)$s][1]($s)) {
+					unset($this->read[(int)$s]);
+				}
+			}
+			foreach ($w as $s) {
+				if ($this->write[(int)$s][1]($s)) {
+					unset($this->write[(int)$s]);
+				}
+			}
+		}
+		return $this->count();
+	}
+	
+	/**
+	 * @implements \Countable
+	 * @return int
+	 */
+	function count() {
+		return count($this->read) + count($this->write);
+	}
+	
+	/**
+	 * Attach a read handler; let the callback return true, to stop watching the fd.
+	 * @param resource $fd
+	 * @param callable $cb
+	 * @return \atick\Ticker
+	 */
+	function read($fd, callable $cb) {
+		$this->read[(int)$fd] = array($fd, $cb);
+		return $this;
+	}
+	
+	/**
+	 * Attach a write handler; let the callback return true, to stop watching the fd.
+	 * @param int $fd
+	 * @param callable $cb
+	 * @return \atick\Ticker
+	 */
+	function write($fd, callable $cb) {
+		$this->write[(int)$fd] = array($fd, $cb);
+		return $this;
+	}
+}
diff --git a/tests/lib/atick/TickerTest.php b/tests/lib/atick/TickerTest.php
new file mode 100644
index 0000000..5d07985
--- /dev/null
+++ b/tests/lib/atick/TickerTest.php
@@ -0,0 +1,69 @@
+<?php
+
+namespace atick;
+
+include __DIR__."/../../setup.inc";
+
+class TickerTest extends \PHPUnit_Framework_TestCase {
+
+	/**
+	 * @var Ticker
+	 */
+	protected $ticker;
+
+	protected function setUp() {
+		$this->ticker = new Ticker;
+	}
+
+	public function testRegister() {
+		$this->ticker->register();
+		$this->ticker->unregister();
+		$this->ticker->register();
+		$this->ticker->unregister();
+	}
+	
+	public function testTicks() {
+		$file = fopen(__FILE__, "r");
+		stream_set_blocking($file, false);
+		$read = 0;
+		
+		declare(ticks=1);
+		$this->ticker->register();
+		$this->ticker->read($file, function ($file) use (&$read) {
+			do {
+				$data = fread($file, 4096);
+				$read += strlen($data);
+			} while (strlen($data));
+			return feof($file);
+		});
+		
+		$dummy = "This test is do tiny, ";
+		$dummy.= "we don't have to do much.";
+		
+		$this->assertEquals(filesize(__FILE__), $read);
+	}
+
+	public function testBasic() {
+		$r = $w = false;
+		$this->assertCount(0, $this->ticker);
+		
+		$file = fopen(__FILE__, "r");
+		stream_set_blocking($file, false);
+		
+		$this->ticker->read($file, function ($file) use (&$r) {
+			return $r;
+		});
+		$this->assertCount(1, $this->ticker);
+		$this->ticker->write($file, function ($file) use (&$w) {
+			return $w;
+		});
+		$this->assertCount(2, $this->ticker);
+		
+		$this->assertSame(2, $this->ticker->wait());
+		$r = true;
+		$this->assertSame(1, $this->ticker->wait());
+		$w = true;
+		$this->assertSame(0, $this->ticker->wait());
+	}
+
+}
diff --git a/tests/setup.inc b/tests/setup.inc
new file mode 100644
index 0000000..e91234c
--- /dev/null
+++ b/tests/setup.inc
@@ -0,0 +1,5 @@
+<?php
+
+spl_autoload_register(function($c) {
+	if (substr($c, 0, 6) == "atick\\") return require_once sprintf("%s/../lib/%s.php", __DIR__, strtr($c, "\\", "/"));
+});
-- 
2.30.2