Native extension on Mac OS X (Air 3)

Question

Hi
I have a blocking issue for native extensions when targetting the MacOS-x86 platform. (in my case Snow Leopard)
I succeded in packaging the ANE file, but I have this error when using it in my test app:
[SWF] tekhnia.simpleAirNativeExtension - 2 871 octets après la décompression
[SWF] simpleAirNativeExtensionTest.swf - 2 119 250 octets après la décompression
Context: [object ExtensionContext] in /Users/vandrito/Documents/Projets/o3sui/.metadata/.plugins/com.adobe.flexbuilder.project. ui/ANEFiles/simpleAirNativeExtensionTest/macosx/simpleAirNativeExtension.ane
ArgumentError: Error #3500: The extension context does not have a method with the name isSupported.
          at flash.external::ExtensionContext/_call()
          at flash.external::ExtensionContext/call()
          at tekhnia.org.simpleAirNativeExtension::simpleAirNativeExtension/isSupported()[/Users/vandr ito/Documents/Projets/o3sui/simpleAirNativeExtension/src/tekhnia/org/simpleAirNativeExtens ion/simpleAirNativeExtension.as:16]
          at simpleAirNativeExtensionTest/init()[/Users/vandrito/Documents/Projets/o3sui/simpleAirNati veExtensionTest/src/simpleAirNativeExtensionTest.mxml:15]
          at simpleAirNativeExtensionTest/___simpleAirNativeExtensionTest_WindowedApplication1_creatio nComplete()[/Users/vandrito/Documents/Projets/o3sui/simpleAirNativeExtensionTest/src/simpl eAirNativeExtensionTest.mxml:5]
          at flash.events::EventDispatcher/dispatchEventFunction()
          at flash.events::EventDispatcher/dispatchEvent()
          at mx.core::UIComponent/dispatchEvent()[E:\dev\4.y\frameworks\projects\framework\src\mx\core \UIComponent.as:13151]
          at mx.core::UIComponent/set initialized()[E:\dev\4.y\frameworks\projects\framework\src\mx\core\UIComponent.as:1818]
          at mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\4.y\frameworks\projects\framewo rk\src\mx\managers\LayoutManager.as:842]
          at mx.managers::LayoutManager/doPhasedInstantiationCallback()[E:\dev\4.y\frameworks\projects \framework\src\mx\managers\LayoutManager.as:1180]
In fact it seems that the initializer is not executed. This is my extension declaration file:
<extension xmlns="http://ns.adobe.com/air/extension/3.1">
   <id>tekhnia.simpleAirNativeExtension</id>
   <versionNumber>1.0.0</versionNumber>
   <name>tekhnia.simpleAirNativeExtension</name>
   <copyright>@2011 OpenTekhnia, Techniware</copyright>
   <platforms>
      <platform name="MacOS-x86">
         <applicationDeployment>
             <nativeLibrary>simpleAirNativeExtension.framework</nativeLibrary>
             <initializer>initNativeExtension</initializer>
             <finalizer>doneNativeExtension</finalizer>
         </applicationDeployment>
       </platform>
    </platforms>
</extension>
That's my *.m file in the xcode framework project:
#import "simpleAirNativeExtension.h"
FREObject isSupported(FREContext ctx,
                void *functionData,
                uint32_t argc,
                FREObject argv[]) {
    FREObject retObj;
    FRENewObjectFromBool(1, &retObj);
    return retObj;
// contextInitializer()
// The context initializer is called when the runtime creates the extension context instance.
void contextInitializer(void* extData, const uint8_t* ctxType, FREContext ctx,
                        uint32_t* numFunctions, const FRENamedFunction** functionsToSet) {
    *numFunctions = 1;
    FRENamedFunction* func = (FRENamedFunction*)malloc(sizeof(FRENamedFunction) * (*numFunctions));
    func[0].name = (const uint8_t*) "isSupported";
    func[0].functionData = NULL;
    func[0].function = &isSupported;
    *functionsToSet = func;   
// contextFinalizer()
// The context finalizer is called when the extension's ActionScript code
// calls the ExtensionContext instance's dispose() method.
// If the AIR runtime garbage collector disposes of the ExtensionContext instance, the runtime also calls
// contextFinalizer().
void contextFinalizer(FREContext ctx) {
    // Nothing to clean up.
    return;
// initMulticastSocket()
// The extension initializer is called the first time the ActionScript side of the extension
// calls ExtensionContext.createExtensionContext() for any context.
void initNativeExtension(void** extDataToSet, FREContextInitializer* ctxInitializerToSet,
                         FREContextFinalizer* ctxFinalizerToSet) {
    *ctxInitializerToSet = &contextInitializer;
    *ctxFinalizerToSet = &contextFinalizer;
// done()
// The extension finalizer is called when the runtime unloads the extension. However, it is not always called.
void doneNativeExtension(void* extData) {
    // Nothing to clean up.
    return;
and that's my .h:
//  simpleAirNativeExtension.h
//  simpleAirNativeExtension
//  Created by Victor Andritoiu on 17/10/11.
//  Copyright (c) 2011 OpenTekhnia. All rights reserved.
#import <Foundation/Foundation.h>
#include "Adobe Air/FlashRuntimeExtensions.h"
void initNativeExtension(void** extDataToSet, FREContextInitializer* ctxInitializerToSet,
                         FREContextFinalizer* ctxFinalizerToSet);
void doneNativeExtension(void* extData);
FREObject isSupported(FREContext ctx,
                      void *functionData,
                      uint32_t argc,
                      FREObject argv[]);
void contextInitializer(void* extData, const uint8_t* ctxType, FREContext ctx,
                        uint32_t* numFunctions, const FRENamedFunction** functionsToSet);
void contextFinalizer(FREContext ctx);
@interface simpleAirNativeExtension : NSObject
@end
And finally my AS3 code for the lib:
package tekhnia.org.simpleAirNativeExtension
          import flash.external.ExtensionContext;
          public class simpleAirNativeExtension {
  /** extension context */
                    protected var context: ExtensionContext;
                    public function simpleAirNativeExtension() {
                              context = ExtensionContext.createExtensionContext("tekhnia.simpleAirNativeExtension", "");
                              trace("Context: " + context + " in " + ExtensionContext.getExtensionDirectory("tekhnia.simpleAirNativeExtension").nativePath);
                    public function isSupported(): Boolean {
                              return context.call("isSupported") as Boolean;
and for the app using it:
<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009"
                                                     xmlns:s="library://ns.adobe.com/flex/spark"
                                                     xmlns:mx="library://ns.adobe.com/flex/mx"
                                                     creationComplete="init()">
  <fx:Script>
                    <![CDATA[
                              import mx.events.FlexEvent;
                              import tekhnia.org.simpleAirNativeExtension.simpleAirNativeExtension;
                              protected function init(): void {
                                        var sane: simpleAirNativeExtension = new simpleAirNativeExtension();
                                        trace(sane.isSupported());
                    ]]>
  </fx:Script>
  <fx:Declarations>
  <!-- Placer ici les éléments non visuels (services et objets de valeur, par exemple). -->
  </fx:Declarations>
</s:WindowedApplication>
If anybody succeeded in using extensions on MacOS, please first tell me that s possible then, maybe help me on getting the error that I make.
Thanks a lot
Victor

Answer 1

Workaround found:
Need to launch adl as a line command (depends on your directory config, of course):
/Applications/Adobe\ Flash\ Builder\ 4.6/sdks/4.6.0/bin/adl -runtime /Library/Frameworks/ -extdir /Users/vandrito/Desktop/simpleAirNativeExtension/launch/extensions -profile extendedDesktop /Users/vandrito/Documents/Projets/o3sui/simpleAirNativeExtensionTest/bin-debug/simpleAirN ativeExtensionTest-app.xml
Pay attention to the library location: it is the one of the Air 3.1 install. Did not check the same trick with Flash Builder 4.6 Air install.
Then use a fake web debugger to connect to the process (if compiled in debug mode). See here how to do (french):
http://www.flex-tutorial.fr/2010/08/05/air-android-debug-sur-mobile-froyo-emulateur-avec-f lash-builder-4/
Victor