thrift-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "HIRANO Satoshi (Commented) (JIRA)" <>
Subject [jira] [Commented] (THRIFT-1340) Add support of ARC to Objective-C
Date Fri, 02 Dec 2011 02:48:40 GMT


HIRANO Satoshi commented on THRIFT-1340:


Thanks for testing and your warm comment. My small magic for the issue of ARC/nonARC compatibility
is applicable to any Cocoa project. I'm happy that you found the value of it. 

I pin it here so that many people can find. Everyone, use it in your project.

TObjective-C.h is for supporting coexistence of both the ARC (Automatic 
Reference Counting) mode and the Non-ARC mode of Objective-C 
in the same source code.


/* TObjective-C.h
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.

 * TObjective-C.h is for supporting coexistence of both the ARC (Automatic 
 * Reference Counting) mode and the Non-ARC mode of Objective-C 
 * in the same source code.
 *                  2011/11/14  HIRANO Satoshi (AIST, Japan)
 * Before:
 *    var = [aObject retain];
 *    [aObject release];
 *    [aObject autorelease];
 *    [super dealloc];
 *    CFFunction(obj);
 * ARC and Non-ARC compatible:
 *    #import "TObjective-C.h"
 *    var = [aObject retain_stub];
 *    [aObject release_stub];
 *    [aObject autorelease_stub];
 *    [super dealloc_stub];
 *    CFFunction(bridge_stub obj);
 *    Don't use retain_stub for @property(retain).
 *    Use NSAutoreleasePool like this:
 *        #if __has_feature(objc_arc)
 *          @autoreleasepool {
 *              // code 
 *          }
 *        #else
 *          NSAutoReleasePool *pool = [[NSAutoReleasePool alloc] init...
 *          // code
 *          [pool release];
 *        #endif

#if !defined(retain_stub)
#if __has_feature(objc_arc)
#define retain_stub self
#define autorelease_stub self
#define release_stub self
#define dealloc_stub self
#define bridge_stub __bridge
#define retain_stub retain
#define autorelease_stub autorelease
#define release_stub release
#define dealloc_stub dealloc
#define bridge_stub

> Add support of ARC to Objective-C
> ---------------------------------
>                 Key: THRIFT-1340
>                 URL:
>             Project: Thrift
>          Issue Type: Improvement
>          Components: Cocoa - Compiler, Cocoa - Library
>    Affects Versions: 0.7
>         Environment: Mac OS X Lion, iOS 4.2, 4.3, 5.0..
>            Reporter: HIRANO Satoshi
>         Attachments: THRIFT-0.8.0-dev_cocoa_ARC.patch
>   Original Estimate: 24h
>  Remaining Estimate: 24h
> Objective-C in Xcode 4.2 supports ARC (Automatic Reference Counting, not GC but similar)
and now it is the default both on OS X Lion and iOS 5. (ARC works on iOS 4.2 or higher.)
> The conventional Objective-C code includes many retain/release/autorelease for maintaining
 the life time of objects.
> Since the latest Objective-C compiler automatically generates stubs for reference counting,
code should not include any retain/release/autorelease.
> Many Mac OS/iOS projects are moving to ARC mode. Although we can specify a compiler flag
which tells ARC or no-ARC file by file in Xcode 4.2, there is no means to tell the Xcode that
files generated by the thrift compiler are no-ARC. Xcode produces many error messages like
"retain is not allowed in ARC mode". 
> So, the thrift compiler should support ARC mode.
> What we need are:
> 1) add -objc-arc flag to the thrift compiler.
> 2) If -objc-arc flag exists, omit generating code for retain/release/autorelease.
> Please look at "Programming with ARC reference notes" in iOS developer library.

This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:!default.jspa
For more information on JIRA, see:


View raw message