More examples and tweaks

* Signal dispatch() method now uses own pid as default value
* SharedData now updates checksum cache on set()

composer.json

@@ -9,6 +9,12 @@
             "email": "cvagnetoft@gmail.com"
         }
     ],
+    "keywords": [
+        "ipc",
+        "shm",
+        "msgqueue",
+        "signals"
+    ],
     "require": {},
     "repositories": [
         {

examples/channels.php

@@ -0,0 +1,16 @@
+<?php
+
+require_once __DIR__."/../vendor/autoload.php";
+
+use NoccyLabs\Ipc\Interop\Channel\StreamChannel;
+
+// Create a pair of channels.
+[ $ch1, $ch2 ] = StreamChannel::createPair();
+
+// Send messages with send()
+$ch1->send([
+    'msg' => "Hello World"
+]);
+
+// Receive at the other end using receive()
+print_r($ch2->receive());

examples/locks.php

@@ -0,0 +1,43 @@
+<?php
+
+require_once __DIR__."/../vendor/autoload.php";
+
+use NoccyLabs\Ipc\Lock\FileLock;
+
+// Creating the lock will not acquire it
+$lock1 = new FileLock(__FILE__);
+$lock2 = new FileLock(__FILE__);
+
+// Acquire the lock like this
+if ($lock1->acquire()) {
+    echo "lock1 acquired\n";
+} else {
+    echo "lock1 not acquired\n";
+}
+
+// Test the locks like this
+if ($lock1->isLocked()) {
+    echo "lock1 is locked\n";
+} else {
+    echo "lock1 is not locked\n";
+}
+if ($lock2->isLocked()) {
+    echo "lock2 is locked\n";
+} else {
+    echo "lock2 is not locked\n";
+}
+
+// This will timeout after a second
+if ($lock2->acquire(1)) {
+    echo "lock2 acquired\n";
+} else {
+    echo "lock2 not acquired\n";
+}
+
+// After releasing, you can acquire it
+$lock1->release();
+if ($lock2->acquire(1)) {
+    echo "lock2 acquired\n";
+} else {
+    echo "lock2 not acquired\n";
+}

examples/shmdata.php

@@ -0,0 +1,34 @@
+<?php
+
+require_once __DIR__."/../vendor/autoload.php";
+
+use NoccyLabs\Ipc\Shm\SharedData;
+use NoccyLabs\Ipc\Key\FileKey;
+
+$key = new FileKey(__FILE__);
+$shm = new SharedData($key);
+
+// Set works as expected
+$shm->set("some.key", "Some value");
+// As does get
+echo $shm->get("some.key")."\n";
+
+// To make sure a value isn't modified while you are modifying it, use the third
+// parameter to set...
+//
+// Let's start at 123
+$shm->set("some.counter", 123);
+$counter = $shm->get("some.counter");
+echo "Counter is: ".$counter."\n";
+// And attempt to increase it
+$shm->set("some.counter", $counter + 1, true);
+$counter = $shm->get("some.counter");
+echo "Counter is: ".$counter."\n";
+
+// If the value is modified, the call will fail
+$shm2 = new SharedData($key);
+$shm2->set("some.counter", 345);
+if (!$shm->set("some.counter", $counter + 1, true)) {
+    echo "some.counter has been modified since last read\n";
+}
+

examples/signals.php

@@ -0,0 +1,29 @@
+<?php
+
+require_once __DIR__."/../vendor/autoload.php";
+
+use NoccyLabs\Ipc\Signal\SignalHandler;
+use NoccyLabs\Ipc\Signal\Signal;
+
+
+$handler = new SignalHandler(SIGUSR1);
+
+// Add handlers like this, or as an array passed as the second argument to the constructor
+$handler->addHandler(function () {
+    echo "First handler\n";
+});
+// If a handler returns true, it will prevent any further handlers from firing
+$handler->addHandler(function () {
+    echo "Second and final handler\n";
+    return true;
+});
+// Thus, this one will not be called
+$handler->addHandler(function() {
+    echo "Third handler, never called\n";
+});
+
+// Dispatch the signal to ourselves
+(new Signal(SIGUSR1))->dispatch(posix_getpid());
+// Default target of dispatch is the own pid
+(new Signal(SIGUSR1))->dispatch();
+    

examples/signaltraps.php

@@ -0,0 +1,16 @@
+<?php
+
+require_once __DIR__."/../vendor/autoload.php";
+
+use NoccyLabs\Ipc\Signal\SignalTrap;
+
+
+
+$trap = new SignalTrap(SIGINT);
+echo "Press ctrl-c...\n";
+
+while (!$trap->isTrapped()) {
+    usleep(10000);
+}
+
+echo "Thanks!\n";

src/Shm/SharedData.php

@@ -113,6 +113,7 @@ class SharedData extends SharedMemory
 
         // Update the data
         $this[self::IDX_DATA + $index] = [ md5($value), $value ];
+        $this->checks[$key] = md5($value);
         $this->unlock();
         return true;
     }

src/Signal/Signal.php

@@ -17,8 +17,8 @@ class Signal
         pcntl_signal($this->signo, $handler);
     }
 
-    public function dispatch($pid):bool
+    public function dispatch($pid=null):bool
     {
-        return posix_kill($pid, $this->signo);
+        return posix_kill($pid?:posix_getpid(), $this->signo);
     }
 }