TweetFollow Us on Twitter

May 95 Top 10
Volume Number:11
Issue Number:5
Column Tag:Symantec Top 10

Symantec Top 10

This monthly column, written by Symantec’s Technical Support Engineers, aims to provide you with technical information based on the use of Symantec products.

By Colen Garoutte-Carson, Quality Assurance & Technical Support, Symantec Corp.

Note: Source code files accompanying article are located on MacTech CD-ROM or source code disks.

Q: How do I build a fat application with Symantec C++ v8.0?

A: We’ve touched on this before, and here’s a more detailed look. When an application is launched on a 68K Macintosh, the operating system (OS) loads and executes a 68K ‘CODE’ resource ID 1. When an application is launched on a PowerMac, the OS first looks for a ‘cfrg’ resource describing a PowerPC code fragment stored in the application’s data fork, and if found, prepares and executes the PowerPC code fragment. If the OS is unable to launch the application this way, it tries to loads and execute a 68K ‘CODE’ resource ID 1.

A fat (fat-binary) application has both a PowerPC code fragment and 68K ‘CODE’ resources, and can be launched on either platform.

To create a fat binary app, enable the option to merge an existing 680x0 application into your final application, in the project Options dialog, in the Project Type settings for an application. This copies all resources from the 68K application that do not already exist in your PowerPC application. Most importantly, this copies all 68K ‘CODE’ resources to your PowerPC application.

Resources in your 68K application with the same type and ID as those in your PowerPC application will not be copied.

You can also build a fat application by including a 68K application’s ‘CODE’ resources in a resource (.rsrc) file, and adding that resource file to your PowerPC project.

Q: How do I create an accelerated code resource?

A: Although the linker in Symantec C++ v8.0 does not yet support the creation of code resources, there is a way to create a code resource from a PowerPC application using Symantec Rez. Symantec C++ v8.0 includes a Code Resource project model which does this.

The Code Resource project model consists of two projects. The first, Code Resource.Π, is similar to a Mac Application project, but doesn’t include InitToolbox() (it’s unnecessary in a code resource). It uses the rsrcMPWPPCRuntime.o runtime library instead of PPCRuntime.o, and PPCLink & MakePEF instead of the internal linker.

In PowerMac applications, constructors and destructors for global and static objects are called automatically by __cplusstart(), which the linker assigns as the main entry point to your application (not main()). This routine calls your constructors, initializes your QuickDraw globals, calls your main() function, and then calls your destructors.

In a shared library, constructors for global and static objects are called by __cplusinit, which the linker assigns as an initialization routine. The Code Fragment Manager will automatically call this initialization routine when your shared library is loaded. The __cplusinit() routine will also hook your shared library’s QuickDraw globals into the QuickDraw globals of the calling application. Destructors for global and static objects are called by __cplusterm(), which the linker assigns as a termination routine. The Code Fragment Manager will automatically call this termination routine when your shared library is unloaded.

In code resources, there is no way to automatically call constructors or destructors for global and static objects, or hook QuickDraw globals, and still preserve the arguments passed to main(). Instead, you must call routines to do this for you. In C, you use __rsrcinit() and __rsrcterm(), declared in stdlib.h. In C++, you use __cplusrsrcinit() and __cplusrsrcterm(), declared in new.h. The C++ initialization and termination routines call the C initialization and termination routines. Use only the C++ or C initialization routines. Do not use both. These routines are defined in the rsrcMPWPPCRuntime.o library.

If your code resource is called only once to perform its function, call __rsrcinit() or __cplusrsrcinit() at the start of your program, and __rsrcterm() or __cplusrsrcterm() at the end.

If your code resource is reentrant, call __rsrcinit() or __cplusrsrcinit() only the first time your code resource is called, and __rsrcterm() or __cplusrsrcterm() the last time your code resource is called.

Do not use any QuickDraw globals, or any global or static objects that rely on their constructor, before calling __rsrcinit() or __cplusrsrcinit().

The second project in the Code Resource project model will copy the data fork of the target built by Code Resource.Π into a resource and prepend a routine descriptor to it. Code Resource.Π is included as a sub-project to the second project. Debugging is disabled for the sub-project to ensure that the sub-project’s target is built instead of a temporary instant-run PEF when the parent project is brought up to date.

Code Resource.Π includes two resource (.r) files, _CopyToResource.r and __AppendRoutineDescriptor.r.

_CopyToResource.r reads the data fork of the sub-project’s target and stores it into a temporary resource.

__AppendRoutineDescriptor.r prepends a routine descriptor to the temporary resource and stores it in your final resource. Before you build your code resource, you will need to modify a number of #define’s in this file. The file contains comments that describe the necessary changes.

The Always check file dates option is enabled in the second project to ensure that the resource description files’ dependency on the sub-project’s target is properly tracked.

__AppendRoutineDescriptor.r is dependant on _CopyToResource.r. These files have been named to compile in the right order.

Once the parent project has been brought up to date, your accelerated code resource will be stored in the project’s resource file (<projectname>.rsrc).

Q: How do I create a fat or safe fat code resource?

A: You can build a fat or safe fat code resource in much the same way that you would create an accelerated code resource, discussed above. The Code Resource project model includes support for these fat code resource types, as well as a few others. See the comments within the project model for details.

Q: Why are my structs a different size in my PowerPC project than they are in my 68K project?

A: The MC68000 chip must reference word or long values from even addresses. More recent chips in the 680x0 family do not have this limitation, but perform faster when referencing word or long values from even addresses. The 68040 and PowerPC chips perform even faster with structures aligned on 4-byte boundaries.

If you need to share data structures in memory between 68K and PowerPC code (e.g. when passing data to the Macintosh Toolbox’s pre-existing 68K-based interfaces), or need to read or write data structures from/to disk with both 68K and PowerPC code, you will need to ensure that your alignment settings match in both your 68K and PowerPC projects.

By default, the PowerPC compilers align fields within structs on 4-byte boundaries. By default, the 68K C++ compiler aligns fields within structs on 2-byte boundaries. Think C always aligns fields within structs on 2-byte boundaries.

The PowerPC compiler supports the following #pragma directive to enable 68K (2-byte) structure alignment in a given structure declaration :

#pragma options align=mac68K
/* Your struct declaration */
#pragma options align=reset

Q: My 68K application, created with the Visual Architect in v7.0(.x), works fine. Why does a fat version of the same application not run on a 68K Mac?

A: Because of changes in the TCL, you will need to re-compile the 68K application with the 68K environment and TCL included in version 8, and re-merge it into your fat application.

Q: When I run my program with the debugger, it launches “Power Mac DebugServices”. This program remains running invisibly. How can I quit this application when I am done debugging?

A: You can write an AppleScript that contains the following :

 tell application "Power Mac DebugServices" to quit

Never run this script while debugging. To ensure that DebugServices has quit when no longer needed, name the script ShutDown, and put it in your (Scripts) folder. The script will be run when you quit the Symantec Project Manager.

Q: Can I use Apple’s new Toolbox Assistant with the Symantec Project Manager?

A: Yes. The Symantec Project Manager supports both The THINK Reference and QuickViewer. It is capable of using both simultaneously.

As with the Think Project Manager, the Symantec Project Manager will allow you to reference the Think Reference or QuickViewer directly if an alias to it, named exactly “THINK Reference” or “Primary Doc Server”, is located in your “(Tools)” folder. The Symantec Project Manager considers these names synonymous. The Symantec Project Manager will search a second documentation server if it’s unsuccessful in finding a match in the first. The second documentation server’s alias must also be located in the “(Tools)” folder and must be named “Secondary Doc Server”.

Q: When I convert my Think Project Manager project, the Symantec Project Manager preserves the segmentation in groups. Is there a way around this?

A: Yes, hold down the shift key when opening the Think Project Manager project.

Q: How do I Check In files to my SourceServer database for the first time? And how do I Check Out files from a SourceServer database that I’ve never checked out before?

A: To do these actions, you must send the command to SourceServer manually. The Symantec Project Manager includes a Worksheet window, available under the Windows menu, that you can use to send commands to SourceServer or ToolServer.

Example of a CheckIn command :

CheckIn -new "filename.cp"

Q: Can I use Check In on the Revision menu to check in header files to a SourceServer database?

A: Yes. In the project Options dialog, on the “Extension” settings page, add .h to the list of supported filename extensions, but do not specify a translator. You will be able to add files with names ending in .h to your project, but they will not be compiled. You can then check these files into your SourceServer database by selecting them in the project window, and then selecting Check In from the Revision menu.

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Bookends 12.8 - Reference management and...
Bookends is a full-featured bibliography/reference and information-management system for students and professionals. Bookends uses the cloud to sync reference libraries on all the Macs you use.... Read more
Apple iTunes 12.6 - Play Apple Music and...
Apple iTunes lets you organize and stream Apple Music, download and watch video and listen to Podcasts. It can automatically download new music, app, and book purchases across all your devices and... Read more
Default Folder X 5.1.4 - Enhances Open a...
Default Folder X attaches a toolbar to the right side of the Open and Save dialogs in any OS X-native application. The toolbar gives you fast access to various folders and commands. You just click on... Read more
Amazon Chime 4.1.5587 - Amazon-based com...
Amazon Chime is a communications service that transforms online meetings with a secure, easy-to-use application that you can trust. Amazon Chime works seamlessly across your devices so that you can... Read more
CrossOver 16.2 - Run Windows apps on you...
CrossOver can get your Windows productivity applications and PC games up and running on your Mac quickly and easily. CrossOver runs the Windows software that you need on Mac at home, in the office,... Read more
Adobe Creative Cloud 4.0.0.185 - Access...
Adobe Creative Cloud costs $19.99/month for a single app, or $49.99/month for the entire suite. Introducing Adobe Creative Cloud desktop applications, including Adobe Photoshop CC and Illustrator CC... Read more
MegaSeg 6.0.2 - Professional DJ and radi...
MegaSeg is a complete solution for pro audio/video DJ mixing, radio automation, and music scheduling with rock-solid performance and an easy-to-use design. Mix with visual waveforms and Magic... Read more
Bookends 12.8 - Reference management and...
Bookends is a full-featured bibliography/reference and information-management system for students and professionals. Bookends uses the cloud to sync reference libraries on all the Macs you use.... Read more
Adobe Creative Cloud 4.0.0.185 - Access...
Adobe Creative Cloud costs $19.99/month for a single app, or $49.99/month for the entire suite. Introducing Adobe Creative Cloud desktop applications, including Adobe Photoshop CC and Illustrator CC... Read more
Default Folder X 5.1.4 - Enhances Open a...
Default Folder X attaches a toolbar to the right side of the Open and Save dialogs in any OS X-native application. The toolbar gives you fast access to various folders and commands. You just click on... Read more

The best deals on the App Store this wee...
Deals, deals, deals. We're all about a good bargain here on 148Apps, and luckily this was another fine week in App Store discounts. There's a big board game sale happening right now, and a few fine indies are still discounted through the weekend.... | Read more »
The best new games we played this week
It's been quite the week, but now that all of that business is out of the way, it's time to hunker down with some of the excellent games that were released over the past few days. There's a fair few to help you relax in your down time or if you're... | Read more »
Orphan Black: The Game (Games)
Orphan Black: The Game 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: Dive into a dark and twisted puzzle-adventure that retells the pivotal events of Orphan Black. | Read more »
The Elder Scrolls: Legends is now availa...
| Read more »
Ticket to Earth beginner's guide: H...
Robot Circus launched Ticket to Earth as part of the App Store's indie games event last week. If you're not quite digging the space operatics Mass Effect: Andromeda is serving up, you'll be pleased to know that there's a surprising alternative on... | Read more »
Leap to victory in Nexx Studios new plat...
You’re always a hop, skip, and a jump away from a fiery death in Temple Jump, a new platformer-cum-endless runner from Nexx Studio. It’s out now on both iOS and Android if you’re an adventurer seeking treasure in a crumbling, pixel-laden temple. | Read more »
Failbetter Games details changes coming...
Sunless Sea, Failbetter Games' dark and gloomy sea explorer, sets sail for the iPad tomorrow. Ahead of the game's launch, Failbetter took to Twitter to discuss what will be different in the mobile version of the game. Many of the changes make... | Read more »
Splish, splash! The Pokémon GO Water Fes...
Niantic is back with a new festival for dedicated Pokémon GO collectors. The Water Festival officially kicks off today at 1 P.M. PDT and runs through March 29. Magikarp, Squirtle, Totodile, and their assorted evolved forms will be appearing at... | Read more »
Death Road to Canada (Games)
Death Road to Canada 1.0 Device: iOS Universal Category: Games Price: $7.99, Version: 1.0 (iTunes) Description: Get it now at the low launch price! Price will go up a dollar every major update. Update news at the bottom of this... | Read more »
Bean's Quest Beginner's Guide:...
Bean's Quest is a new take on both the classic platformer and the endless runner, and it's free on the App Store for the time being. Instead of running constantly, you can't stop jumping. That adds a surprising new level of challenge to the game... | Read more »

Price Scanner via MacPrices.net

2.6GHz Mac mini on sale for $559, $140 off MS...
Guitar Center has the 2.6GHz Mac mini (MGEN2LL/A) on sale for $559 including free shipping. Their price is $140 off MSRP, and it’s the lowest price available for this model. Read more
SSD Speeder RAM Disk SSD Life Extender App Fo...
Fehraltorf, Switzerland based B-Eng has announced they are making their SSD Speeder app for macOS publicly available for purchase on their website. SSD Speeder is a RAM disk utility that prevents... Read more
iPhone Scores Highest Overall in Smartphone D...
Customer satisfaction is much higher among smartphone owners who use their device to operate other connected home services such as smart thermostats and smart appliances, according to the J.D. Power... Read more
Swipe CRM Free Photo-Centric CRM Sales DEal C...
Swipe CRM LLC has introduced Swipe CRM: Visual Sales 1.0 for iPad, an app for creating, managing, and sharing visually stunning sales deals. Swipe CRM is targeted to small-and-medium creative... Read more
13-inch 2.0GHz Apple MacBook Pros on sale for...
B&H has the non-Touch Bar 13″ 2.0GHz MacBook Pros in stock today and on sale for $150 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 13″ 2.0GHz MacBook Pro Space Gray (... Read more
15-inch Touch Bar MacBook Pros on sale for up...
B&H Photo has the new 2016 15″ Apple Touch Bar MacBook Pros in stock today and on sale for up to $150 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 15″ 2.7GHz Touch Bar... Read more
Apple’s iPhone 6s Tops Best-Selling Smartphon...
In terms of shipments, the iPhone 6s from Apple bested all competitors for sales in 2016, according to new analysis from IHS Markit, a world leader in critical information, analytics and solutions.... Read more
Logitech Rugged Combo Protective iPad Case an...
Logitech has announced its Logitech Rugged Combo, Logitech Rugged Case, and Logitech Add-on Keyboard for Rugged Case for Apple’s new, more affordable $329 9.7-inch iPad, a complete solution designed... Read more
T-Mobile To Offer iPhone 7 and iPhone 7 Plus...
T-Mobile has announced it will offer iPhone 7 and iPhone 7 Plus (PRODUCT)RED Special Edition in a vibrant red aluminum finish. The introduction of this special edition iPhone celebrates Apple’s 10... Read more
9-inch 128GB iPad Pros on sale for $50-$70 of...
B&H Photo has 9.7″ 128GB Apple WiFi iPad Pros on sale for up to $70 off MSRP, each including free shipping. B&H charges sales tax in NY only: - 9″ Space Gray 128GB WiFi iPad Pro: $649 $50... Read more

Jobs Board

*Apple* Retail - Multiple Positions - Apple,...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
Fulltime aan de slag als shopmanager in een h...
Ben jij helemaal gek van Apple -producten en vind je het helemaal super om fulltime shopmanager te zijn in een jonge en hippe elektronicazaak? Wil jij werken in Read more
Starte Dein Karriere-Abenteuer in den Hauptst...
…mehrsprachigen Teams betreust Du Kunden von bekannten globale Marken wie Apple , Mercedes, Facebook, Expedia, und vielen anderen! Funktion Du wolltest schon Read more
*Apple* Retail - Multiple Positions- Chicago...
SalesSpecialist - Retail Customer Service and SalesTransform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the Read more
Fulltime aan de slag als shopmanager in een h...
Ben jij helemaal gek van Apple -producten en vind je het helemaal super om fulltime shopmanager te zijn in een jonge en hippe elektronicazaak? Wil jij werken in Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.