php-linux-gpio/lib/GpioWatcher.php

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<?php
/*
* Copyright (C) 2014, NoccyLabs
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
namespace NoccyLabs\Gpio;
use NoccyLabs\Gpio\Exception\HardwareException;
/**
* Watch GPIO for interrupts (hardware or software)
*
*
*
*/
class GpioWatcher
{
protected $fd_gpio = array();
protected $fd_pins = array();
public function refresh()
{
$read = $this->fd_gpio;
$write = array();
$except = $read;
if (count($read)>0) {
stream_select($read, $write, $except, 0);
foreach($except as $fd) {
$pin = $this->getPinFromFd($fd);
$pin->doInterrupt();
}
}
}
public function getPinFromFd($fd)
{
foreach($this->fd_pins as $pinfd=>$pin) {
if ($pinfd == $fd) { return $pin; }
}
return false;
}
public function enableInterrupt(GpioPin $pin, $fd)
{
$this->fd_gpio[] = $fd;
$this->fd_pins[$fd] = $pin;
}
public function disableInterrupt(GpioPin $pin)
{
}
}