diff --git a/.gitignore b/.gitignore
index 222511e..d1394d2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -181,6 +181,7 @@ fabric.properties
 .libs/
 build/
 configure.in
+configure.ac
 mkinstalldirs
 run-tests.php
 Makefile.global
diff --git a/Makefile.frag b/Makefile.frag
index 2daa2ae..ea9eb3b 100644
--- a/Makefile.frag
+++ b/Makefile.frag
@@ -40,16 +40,20 @@ $(BUILD_DIR)/aws-crt-ffi/CMakeCache.txt: $(INT_DIR)/lib/libcrypto.a
 $(BUILD_DIR)/aws-crt-ffi/libaws-crt-ffi.so: $(BUILD_DIR)/aws-crt-ffi/CMakeCache.txt
 	$(CMAKE_BUILD) build/aws-crt-ffi $(CMAKE_TARGET)
 
-# copy the lib into the lib folder
-$(INSTALL_DIR)/lib/libaws-crt-ffi.so: $(BUILD_DIR)/aws-crt-ffi/libaws-crt-ffi.so $(INSTALL_DIR)/lib/api.h
-	cp -v $(BUILD_DIR)/aws-crt-ffi/libaws-crt-ffi.so $(INSTALL_DIR)/lib/libaws-crt-ffi.so
+# copy the lib into the src folder
+$(INSTALL_DIR)/src/libaws-crt-ffi.so: $(BUILD_DIR)/aws-crt-ffi/libaws-crt-ffi.so $(INSTALL_DIR)/src/api.h
+	cp -v $(BUILD_DIR)/aws-crt-ffi/libaws-crt-ffi.so $(INSTALL_DIR)/src/libaws-crt-ffi.so
 
 # install api.h from FFI lib
-$(INSTALL_DIR)/lib/api.h: crt/aws-crt-ffi/src/api.h
-	cat crt/aws-crt-ffi/src/api.h | grep -v AWS_EXTERN_C | sed -e 's/AWS_CRT_API //' | grep -ve '^#' > $(INSTALL_DIR)/lib/api.h
+$(INSTALL_DIR)/src/api.h: crt/aws-crt-ffi/src/api.h
+	cat crt/aws-crt-ffi/src/api.h | grep -v AWS_EXTERN_C | sed -e 's/AWS_CRT_API //' | grep -ve '^#' > $(INSTALL_DIR)/src/api.h
+
+# copy the FFI lib from src to ext for the extension to use
+$(INSTALL_DIR)/ext/libaws-crt-ffi.so: $(INSTALL_DIR)/src/libaws-crt-ffi.so
+	cp -v $(INSTALL_DIR)/src/libaws-crt-ffi.so $(INSTALL_DIR)/ext/libaws-crt-ffi.so
 
 # Force the crt object target to depend on the FFI library
-src/crt.lo: $(INSTALL_DIR)/lib/libaws-crt-ffi.so
+ext/crt.lo: $(INSTALL_DIR)/ext/libaws-crt-ffi.so
 
 ifeq ($(TEST_FFI),1)
 test-ci: test-ffi
@@ -58,6 +62,6 @@ test-ci: test
 endif
 
 # Test the FFI interface
-test-ffi: $(INSTALL_DIR)/lib/libaws-crt-ffi.so
+test-ffi: $(INSTALL_DIR)/src/libaws-crt-ffi.so
 	composer update
 	composer run test
diff --git a/composer.json b/composer.json
index 856b366..9131452 100644
--- a/composer.json
+++ b/composer.json
@@ -12,19 +12,16 @@
     },
     "autoload": {
         "classmap": [
-            "lib/"
-        ],
-        "psr-4": {
-            "AWS\\": "lib/AWS"
-        }
+            "src/"
+        ]
     },
     "autoload-dev": {
         "classmap": [
-            "lib/tests/"
+            "src/tests/"
         ]
     },
     "scripts": {
-        "test": "phpunit lib/tests"
+        "test": "phpunit src/tests"
     },
     "license": "Apache-2.0",
     "authors": [
diff --git a/config.m4 b/config.m4
index eeb4759..61cc655 100644
--- a/config.m4
+++ b/config.m4
@@ -17,7 +17,7 @@ if test "$PHP_AWSCRT" != "no"; then
     PHP_SUBST(AWSCRT_SHARED_LIBADD)
 
     # Sources for the PHP extension itself
-    AWSCRT_SOURCES=src/*.c
+    AWSCRT_SOURCES=ext/*.c
     PHP_NEW_EXTENSION(awscrt, $AWSCRT_SOURCES, $ext_shared)
 fi
 
diff --git a/ext/.gitignore b/ext/.gitignore
new file mode 100644
index 0000000..2973c97
--- /dev/null
+++ b/ext/.gitignore
@@ -0,0 +1,2 @@
+*.so
+api.h
diff --git a/src/crt.c b/ext/crt.c
similarity index 100%
rename from src/crt.c
rename to ext/crt.c
diff --git a/src/php_aws_crt.h b/ext/php_aws_crt.h
similarity index 100%
rename from src/php_aws_crt.h
rename to ext/php_aws_crt.h
diff --git a/format-check.sh b/format-check.sh
index ca5af09..9783241 100755
--- a/format-check.sh
+++ b/format-check.sh
@@ -10,7 +10,7 @@ if NOT type $CLANG_FORMAT 2> /dev/null ; then
 fi
 
 FAIL=0
-SOURCE_FILES=`find src -type f \( -name '*.h' -o -name '*.c' \)`
+SOURCE_FILES=`find ext -type f \( -name '*.h' -o -name '*.c' \)`
 for i in $SOURCE_FILES
 do
     $CLANG_FORMAT -output-replacements-xml $i | grep -c "<replacement " > /dev/null
diff --git a/lib/.gitignore b/src/.gitignore
similarity index 100%
rename from lib/.gitignore
rename to src/.gitignore
diff --git a/lib/AWS/CRT.php b/src/AWS/CRT/CRT.php
similarity index 52%
rename from lib/AWS/CRT.php
rename to src/AWS/CRT/CRT.php
index 9535e3b..b4bde63 100644
--- a/lib/AWS/CRT.php
+++ b/src/AWS/CRT/CRT.php
@@ -1,21 +1,33 @@
 <?php
 
+namespace AWS\CRT;
+
+use AWS\CRT\Internal\Extension;
+use AWS\CRT\Internal\FFI;
+
+use \RuntimeException;
+
 /**
- * Wrapper for the FFI interface to the CRT. There only ever needs to be one of these.
+ * Wrapper for the interface to the CRT. There only ever needs to be one of these, but
+ * additional instances won't cost anything other than their memory.
  * Creating an instance of any NativeResource will activate the CRT binding. User code
- * should only need to create one of these if they are only accessing CRT:: functions.
+ * should only need to create one of these if they are only accessing CRT:: static functions.
  */
 final class CRT {
-    private static $ffi = null;
+
+    private static $impl = null;
     private static $refcount = 0;
 
     function __construct() {
-        if (is_null(self::$ffi)) {
+        if (is_null(self::$impl)) {
             try {
-                self::$ffi = FFI::cdef(file_get_contents(__DIR__ . "/../api.h"), __DIR__ . "/../libaws-crt-ffi.so");
-                self::init();
-            } catch (Exception $e) {
-                echo 'Exception while initializing CRT via FFI: ', $e->getMessage(), "\n";
+                self::$impl = new Extension();
+            } catch (RuntimeException $rex) {
+                try {
+                    self::$impl = new FFI();
+                } catch (RuntimeException $frex) {
+                    throw new RuntimeException('Unable to initialize AWS CRT via extension or FFI', -1, $frex);
+                }
             }
         }
         ++self::$refcount;
@@ -23,24 +35,15 @@ final class CRT {
 
     function __destruct() {
         if (--self::$refcount == 0) {
-            self::clean_up();
-            self::$ffi = null;
+            self::$impl = null;
         }
     }
 
-    private static function init() {
-        return self::$ffi->aws_crt_init();
-    }
-
-    private static function clean_up() {
-        return self::$ffi->aws_crt_clean_up();
-    }
-
     /**
      * @return integer last error code reported within the CRT
      */
     public static function last_error() {
-        return self::$ffi->aws_crt_last_error();
+        return self::$impl->aws_crt_last_error();
     }
 
     /**
@@ -48,7 +51,7 @@ final class CRT {
      * @return string Human-readable description of the provided error code
      */
     public static function error_str($error) {
-        return self::$ffi->aws_crt_error_str((int) $error);
+        return self::$impl->aws_crt_error_str((int) $error);
     }
 
     /**
@@ -56,14 +59,14 @@ final class CRT {
      * @return string Name/enum identifier for the provided error code
      */
     public static function error_name($error) {
-        return self::$ffi->aws_crt_error_name((int) $error);
+        return self::$impl->aws_crt_error_name((int) $error);
     }
 
     function event_loop_group_new($num_threads) {
-        return self::$ffi->aws_crt_event_loop_group_new($num_threads);
+        return self::$impl->aws_crt_event_loop_group_new($num_threads);
     }
 
     function event_loop_group_release($elg) {
-        return self::$ffi->aws_crt_event_loop_group_release($elg);
+        return self::$impl->aws_crt_event_loop_group_release($elg);
     }
 }
diff --git a/lib/AWS/CRT/IO/EventLoopGroup.php b/src/AWS/CRT/IO/EventLoopGroup.php
similarity index 85%
rename from lib/AWS/CRT/IO/EventLoopGroup.php
rename to src/AWS/CRT/IO/EventLoopGroup.php
index 38e74a9..cccf919 100644
--- a/lib/AWS/CRT/IO/EventLoopGroup.php
+++ b/src/AWS/CRT/IO/EventLoopGroup.php
@@ -1,5 +1,9 @@
 <?php
 
+namespace AWS\CRT\IO;
+
+use AWS\CRT\NativeResource as NativeResource;
+
 /**
  * Represents 1 or more event loops (1 per thread) for doing I/O and background tasks.
  * Typically, every application has one EventLoopGroup.
@@ -24,8 +28,7 @@ final class EventLoopGroup extends NativeResource {
     }
 
     function __destruct() {
-        self::$crt->event_loop_group_release($this->native);
-        $this->release();
+        self::$crt->event_loop_group_release($this->release());
         parent::__destruct();
     }
 }
diff --git a/src/AWS/CRT/Internal/Extension.php b/src/AWS/CRT/Internal/Extension.php
new file mode 100644
index 0000000..0defbc5
--- /dev/null
+++ b/src/AWS/CRT/Internal/Extension.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace AWS\CRT\Internal;
+
+use \RuntimeException;
+
+/**
+ * @internal
+ * Forwards calls on to awscrt PHP extension functions
+ */
+final class Extension {
+    function __construct() {
+        if (!extension_loaded('awscrt')) {
+            throw new RuntimeException('awscrt extension is not loaded');
+        }
+    }
+
+    /**
+     * Forwards any call made on this object to the extension function of the
+     * same name with the supplied arguments. Argument type hinting and checking
+     * occurs at the CRT wrapper.
+     */
+    function __call(string $name, $args) {
+        return call_user_func_array($name, $args);
+    }
+}
diff --git a/src/AWS/CRT/Internal/FFI.php b/src/AWS/CRT/Internal/FFI.php
new file mode 100644
index 0000000..c10e03b
--- /dev/null
+++ b/src/AWS/CRT/Internal/FFI.php
@@ -0,0 +1,51 @@
+<?php
+
+namespace AWS\CRT\Internal;
+
+use \Exception;
+use \RuntimeException;
+
+/**
+ * @internal
+ * Forwards calls on to libaws-crt-ffi via FFI
+ */
+final class FFI {
+    private static $ffi = null;
+    private static $refcount = 0;
+
+    function __construct() {
+        if (is_null(self::$ffi)) {
+            try {
+                self::$ffi = \FFI::cdef(file_get_contents(__DIR__ . "/../../../api.h"), __DIR__ . "/../../../libaws-crt-ffi.so");
+                self::init();
+            } catch (Exception $e) {
+                throw new RuntimeException('Exception while initializing CRT via FFI', 0, $e);
+            }
+        }
+        ++self::$refcount;
+    }
+
+    function __destruct() {
+        if (--self::$refcount == 0) {
+            self::clean_up();
+            self::$ffi = null;
+        }
+    }
+
+    /**
+     * Forwards any call made on this object to the FFI function of the
+     * same name with the supplied arguments. Argument type hinting and checking
+     * occurs at the CRT wrapper.
+     */
+    function __call(string $name, $args) {
+        return call_user_func_array(array(self::$ffi, $name), $args);
+    }
+
+    private static function init() {
+        return self::$ffi->aws_crt_init();
+    }
+
+    private static function clean_up() {
+        return self::$ffi->aws_crt_clean_up();
+    }
+}
diff --git a/lib/AWS/CRT/NativeResource.php b/src/AWS/CRT/NativeResource.php
similarity index 80%
rename from lib/AWS/CRT/NativeResource.php
rename to src/AWS/CRT/NativeResource.php
index f47de36..6fc5bb4 100644
--- a/lib/AWS/CRT/NativeResource.php
+++ b/src/AWS/CRT/NativeResource.php
@@ -1,5 +1,9 @@
 <?php
 
+namespace AWS\CRT;
+
+use AWS\CRT\CRT as CRT;
+
 /**
  * Base class for all native resources, tracks all outstanding resources
  * and provides basic leak checking
@@ -11,11 +15,7 @@ abstract class NativeResource {
 
     function __construct() {
         if (is_null(self::$crt)) {
-            try {
-                self::$crt = new CRT();
-            } catch (Exception $e) {
-                echo 'Exception while loading CRT: ', $e->getMessage(), "\n";
-            }
+            self::$crt = new CRT();
         }
 
         self::$resources[spl_object_hash($this)] = 1;
@@ -26,7 +26,9 @@ abstract class NativeResource {
     }
 
     protected function release() {
+        $native = $this->native;
         $this->native = null;
+        return $native;
     }
 
     function __destruct() {
diff --git a/lib/php.ini b/src/php.ini
similarity index 100%
rename from lib/php.ini
rename to src/php.ini
diff --git a/lib/tests/ErrorTest.php b/src/tests/ErrorTest.php
similarity index 97%
rename from lib/tests/ErrorTest.php
rename to src/tests/ErrorTest.php
index 021d3ad..5027987 100644
--- a/lib/tests/ErrorTest.php
+++ b/src/tests/ErrorTest.php
@@ -1,5 +1,7 @@
 <?php
 
+use AWS\CRT\CRT;
+
 final class ErrorTest extends PHPUnit_Framework_TestCase {
     private static $crt = null;
     public static function setUpBeforeClass() {
diff --git a/lib/tests/EventLoopGroupTest.php b/src/tests/EventLoopGroupTest.php
similarity index 64%
rename from lib/tests/EventLoopGroupTest.php
rename to src/tests/EventLoopGroupTest.php
index 5e20f36..0ddb66d 100644
--- a/lib/tests/EventLoopGroupTest.php
+++ b/src/tests/EventLoopGroupTest.php
@@ -1,9 +1,12 @@
 <?php
 
+use AWS\CRT\IO\EventLoopGroup as EventLoopGroup;
+
 final class EventLoopGroupTest extends PHPUnit_Framework_TestCase {
 
     public function testLifetime() {
         $elg = new EventLoopGroup();
+        $this->assertNotNull($elg, "Failed to create default EventLoopGroup");
         $elg = null;
     }
 
@@ -11,6 +14,7 @@ final class EventLoopGroupTest extends PHPUnit_Framework_TestCase {
         $options = EventLoopGroup::defaults();
         $options['num_threads'] = 1;
         $elg = new EventLoopGroup($options);
+        $this->assertNotNull($elg, "Failed to create EventLoopGroup with 1 thread");
         $elg = null;
     }
 }