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

Vivaldi 2.6.1566.49 - An advanced browse...
Vivaldi is a browser for our friends. We live in our browsers. Choose one that has the features you need, a style that fits and values you can stand by. From the look and feel, to how you interact... Read more
Capo 3.7.4 - Slow down and learn to play...
Capo lets you slow down your favorite songs so you can hear the notes and learn how they are played. With Capo, you can quickly tab out your songs atop a highly-detailed OpenCL-powered spectrogram... Read more
Daylite 6.7.3.1 - Dynamic business organ...
Daylite helps businesses organize themselves with tools such as shared calendars, contacts, tasks, projects, notes, and more. Enable easy collaboration with features such as task and project... Read more
Firefox 68.0.1 - Fast, safe Web browser.
Firefox offers a fast, safe Web browsing experience. Browse quickly, securely, and effortlessly. With its industry-leading features, Firefox is the choice of Web development professionals and casual... Read more
Dashlane 6.1927.0 - Password manager and...
Dashlane is an award-winning service that revolutionizes the online experience by replacing the drudgery of everyday transactional processes with convenient, automated simplicity - in other words,... Read more
BetterTouchTool 3.153 - Customize multi-...
BetterTouchTool adds many new, fully customizable gestures to the Magic Mouse, Multi-Touch MacBook trackpad, and Magic Trackpad. These gestures are customizable: Magic Mouse: Pinch in / out (zoom)... Read more
calibre 3.46.0 - Complete e-book library...
Calibre is a complete e-book library manager. Organize your collection, convert your books to multiple formats, and sync with all of your devices. Let Calibre be your multi-tasking digital librarian... Read more
DEVONthink Pro 3.0beta4 - Knowledge base...
DEVONthink Pro is your essential assistant for today's world, where almost everything is digital. From shopping receipts to important research papers, your life often fills your hard drive in the... Read more
Adobe Creative Cloud 4.9.0.512 - Access...
Adobe Creative Cloud costs $20.99/month for a single app, or $52.99/month for the entire suite. Introducing Adobe Creative Cloud desktop applications, including Adobe Photoshop CC and Illustrator CC... Read more
Chromium 75.0.3770.142 - Fast and stable...
Chromium is an open-source browser project that aims to build a safer, faster, and more stable way for all Internet users to experience the web. Version 75.0.3770.142: Release notes were... Read more

Latest Forum Discussions

See All

Void Tyrant guide - Tips and tricks for...
Void Tyrant continues to get a lot of play in these parts. Probably because the game is just so deep and varied. The next stop on our guide series for Void Tyrant is class-specific guides. First up is the Knight, as it’s the first class anyone has... | Read more »
Summon beasts and battle evil in epic re...
Imagine a tale of conlict between factions of good and evil, where rogueish heroes summon beasts to aid them in them in warfare and courageously battle dragons over fields of scorched earth and brimstone - that's exactly the essence of epic fantasy... | Read more »
Upcoming visual novel Arranged shines a...
If you’re in the market for a new type of visual novel designed to inform and make you think deeply about its subject matter, then Arranged by Kabuk Games could be exactly what you’re looking for. It’s a wholly unique take on marital traditions in... | Read more »
TEPPEN guide - The three best decks in T...
TEPPEN’s unique take on the collectible card game genre is exciting. It’s just over a week old, but that isn’t stopping lots of folks from speculating about the long-term viability of the game, as well as changes and additions that will happen over... | Read more »
Intergalactic puzzler Silly Memory serve...
Recently released matching puzzler Silly Memory is helping its fans with their intergalactic journeys this month with some very special offers on in-app purchases. In case you missed it, Silly Memory is the debut title of French based indie... | Read more »
TEPPEN guide - Tips and tricks for new p...
TEPPEN is a wild game that nobody asked for, but I’m sure glad it exists. Who would’ve thought that a CCG featuring Capcom characters could be so cool and weird? In case you’re not completely sure what TEPPEN is, make sure to check out our review... | Read more »
Dr. Mario World guide - Other games that...
We now live in a post-Dr. Mario World world, and I gotta say, things don’t feel too different. Nintendo continues to squirt out bad games on phones, causing all but the most stalwart fans of mobile games to question why they even bother... | Read more »
Strategy RPG Brown Dust introduces its b...
Epic turn-based RPG Brown Dust is set to turn 500 days old next week, and to celebrate, Neowiz has just unveiled its biggest and most exciting update yet, offering a host of new rewards, increased gacha rates, and a brand new feature that will... | Read more »
Dr. Mario World is yet another disappoin...
As soon as I booted up Dr. Mario World, I knew I wasn’t going to have fun with it. Nintendo’s record on phones thus far has been pretty spotty, with things trending downward as of late. [Read more] | Read more »
Retro Space Shooter P.3 is now available...
Shoot-em-ups tend to be a dime a dozen on the App Store, but every so often you come across one gem that aims to shake up the genre in a unique way. Developer Devjgame’s P.3 is the latest game seeking to do so this, working as a love letter to the... | Read more »

Price Scanner via MacPrices.net

Weekend Deal: 2018 13″ MacBook Airs starting...
B&H Photo has clearance 2018 13″ MacBook Airs available starting at only $999 with all models now available for $200 off Apple’s original MSRP. Overnight shipping, or expedited shipping, is free... Read more
Apple has clearance 10.5″ iPad Pros available...
Apple has Certified Refurbished 2017 10.5″ iPad Pros available starting at $469. An Apple one-year warranty is included with each iPad, outer shells are new, and shipping is free: – 64GB 10″ iPad Pro... Read more
Apple restocks refurbished iPad mini 4 models...
Apple has restocked Certified Refurbished 32GB iPad mini 4 WiFi models for $229 shipped. That’s $70 off original MSRP for the iPad mini 4. Space Gray, Silver, and Gold colors are available. Read more
Apple, Yet Again, Is Missing An Ultraportable...
EDITORIAL: 07.19.19 Prior to the decision made by Apple earlier this month to retire the thin and light MacBook model with a 12-inch retina display, the Cupertino, California-based company offered,... Read more
Verizon is offering a 50% discount on iPhone...
Verizon is offering 50% discounts on Apple iPhone 8 and iPhone 8 Plus models though July 24th, plus save 50% on activation fees. New line required. The fine print: “New device payment & new... Read more
Get a new 21″ iMac for under $1000 today at t...
B&H Photo has new 21″ Apple iMacs on sale for up to $100 off MSRP with models available starting at $999. These are the same iMacs offered by Apple in their retail and online stores. Shipping is... Read more
Clearance 2017 15″ 2.8GHz Touch Bar MacBook P...
Apple has Certified Refurbished 2017 15″ 2.8GHz Space Gray Touch Bar MacBook Pros available for $1809. Apple’s refurbished price is currently the lowest available for a 15″ MacBook Pro. An standard... Read more
Clearance 12″ 1.2GHz MacBook on sale for $899...
Focus Camera has clearance 12″ 1.2GHz Space Gray MacBooks available for $899.99 shipped. That’s $400 off Apple’s original MSRP. Focus charges sales tax for NY & NJ residents only. Read more
Get a new 2019 13″ 2.4GHz 4-Core MacBook Pro...
B&H Photo has new 2019 13″ 2.4GHz MacBook Pros on sale for up to $150 off Apple’s MSRP. Overnight shipping is free to many addresses in the US: – 2019 13″ 2.4GHz/256GB 6-Core MacBook Pro Silver... Read more
AirPods with Wireless Charging Case now on sa...
Amazon has extended their Prime Day savings on Apple AirPods by offering AirPods with the Wireless Charging case for $169.99. That’s $30 off Apple’s MSRP, and it’s the cheapest price available for... Read more

Jobs Board

Geek Squad *Apple* Master Consultation Agen...
**702908BR** **Job Title:** Geek Squad Apple Master Consultation Agent **Job Category:** Services/Installation/Repair **Location Number:** 000360-Williston-Store Read more
Best Buy *Apple* Computing Master - Best Bu...
**711023BR** **Job Title:** Best Buy Apple Computing Master **Job Category:** Sales **Location Number:** 000012-St Cloud-Store **Job Description:** **What does a Read more
*Apple* Systems Architect/Engineer, Vice Pre...
…its vision to be the world's most trusted financial group. **Summary:** Apple Systems Architect/Engineer with strong knowledge of products and services related to Read more
Best Buy *Apple* Computing Master - Best Bu...
**696259BR** **Job Title:** Best Buy Apple Computing Master **Job Category:** Store Associates **Location Number:** 001076-Temecula-Store **Job Description:** The Read more
Business Development Manager, *Apple* Globa...
Business Development Manager, Apple Global Tampa, FL, US Requisition Number:73805 As a Global Apple Business Development Manager at Insight, you proactively Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.