[ZooLib-dev] The .0029% solution

[Richard C. <rd_...@sb...>]

I just solved the TMThread.cpp problem on xcode. :)

Look for the definition of sTestAndSet

#if ZCONFIG(Processor, PPC)

#ifdef __GNUC__
bool sTestAndSet(register int32& ioInt32) {
     register bool result;
     asm {
         // Get the current value of theLong into r5, and reserve the 
address
tryagain:
         lwarx r5, 0, r3 // ioInt32 is in r3
         // Set bit 7 of r4 (so we have the same effect as 68K tas 
instruction)
         ori r4, r5, 0x80
         // Stick the new value back into theLong.
         stwcx. r4, 0, r3 // ioInt32
         // If the operation was interrupted between the lwarx and the 
stwcx, then
         // the eq bit will be set, so branch back and try again
         bne tryagain
         // If we get here then the bit has been set. Now check to see 
if it was set
         // before we started.
         andi. r5, r5, 0x80
         bne wasSet
         li result, 0    // we could just shove the result in r0, but 
that would be obscure
         b done
wasSet:
         li result, 1
done:
     }
    return result;
}

#else
     static asm bool sTestAndSet(register int32& ioInt32) {