Semaphores fully implemented

.gitignore

@@ -1,2 +1,3 @@
 /vendor/
 /composer.lock
+/doc

src/Sem/Semaphore.php

@@ -8,18 +8,25 @@ use NoccyLabs\Ipc\Key\KeyInterface;
 
 class Semaphore
 {
-    public function __construct(KeyInterface $key, int $max)
+    protected $resource;
+
+    public function __construct(KeyInterface $key, int $max, $perm = 0660, $autorelease = 1)
     {
+        $this->resource = sem_get($key->getKey(), $max, $perm, $autorelease);
+    }
 
+    public function destroy()
+    {
+        sem_remove($this->resource);
     }
 
-    public function acquire(float $timeout)
+    public function acquire(float $timeout = 0):bool
     {
-        
+        return sem_acquire($this->resource, true);
     }
 
-    public function release()
+    public function release():bool
     {
-        
+        return sem_release($this->resource);
     }
 }

tests/Sem/SemaphoreTest.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace NoccyLabs\Ipc\Sem;
+
+use NoccyLabs\Ipc\Key\FileKey;
+
+
+
+class SemaphoreTest extends \PhpUnit\Framework\TestCase
+{
+
+    public function testCreatingAndAquiringSemaphore()
+    {
+        $key = new FileKey(__FILE__);
+        $sem = new Semaphore($key, 2);
+
+        $this->assertTrue($sem->acquire());
+        $this->assertTrue($sem->acquire());
+        $this->assertFalse($sem->acquire());
+        $this->assertTrue($sem->release());
+        $this->assertTrue($sem->acquire());
+        $this->assertFalse($sem->acquire());
+        $this->assertTrue($sem->release());
+        $this->assertTrue($sem->release());
+    }
+
+}