Re: How smart is Rosetta?

Subject: Re: How smart is Rosetta?

From: Ben Weiss <email@hidden>

Date: Tue, 6 Jun 2006 14:51:41 -0700

Delivered-to: email@hidden

On Jun 6, 2006, at 3:00 AM, Marc Stibane wrote:

Am 21. Jan 2006 um 18:50:15 schrieb George Warner:

On Sat, 21 Jan 2006 15:54:15 +0000, Richard Bannister <email@hidden>
wrote:

Scenario as follows.

Three players:
- Program, a Carbon Mach-O PowerPC binary compiled with CodeWarrior.
- Bundle A, a PowerPC code bundle compiled with CodeWarrior.
- Bundle B, a Universal Binary code bundle compiled with Xcode.

Program loads a code module from bundle file A. Bundle file A loads a
code module from Bundle file B.

Is code from Bundle B going to be native on an Intel machine, or will
the PowerPC code be run emulated?

It's "all or nothing"; It ether runs completely in Rosetta or completely
native.

Can I launch an Intel-native Unix tool from a PPC PlugIn running inside a PPC app in Rosetta and then use AppleEvents to communicate?
Or, even better, can the Unix tool get its arguments via argc/argv[] and respond via printf(stdout...)?
Which "fine manual" should I read?

Yes, at least to the first question. I'm currently doing this by using LSOpenFSRef to launch an x86-native application, then using CFMessagePorts and POSIX-controlled shared memory to communicate with fairly decent performance. (Altivec on native PPC still blows SSE out of the water.) The global limit on shared memory appears to be 4MB, which is somewhat restrictive for my purposes (image-processing).... Anyway, Rosetta can be detected with the following bit of code:

bool CPSFMactel::IsRosetta() {

bool isRosetta = false;

char model[32];

size_t len = sizeof(model);

int mib[2] = { CTL_HW, HW_MODEL };

if (sysctl(mib, 2, &model, &len, NULL, 0) == 0) {

isRosetta = (len == 9 && strcmp(model, "PowerMac") == 0);

}

return isRosetta;

}

Hope this helps,

Ben

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Follow-Ups:

Re: How smart is Rosetta?
- From: John Stiles <email@hidden>
Re: How smart is Rosetta?
- From: John Stiles <email@hidden>

References:

>Re: How smart is Rosetta? (From: Marc Stibane <email@hidden>)