On Fri, 25 May 2001, Jun Sun wrote: > Alright, I rolled my sleeve and digged into IRIX 6.5, and guess what? > sysmips() does NOT have MIPS_ATOMIC_SET (2001) on IRIX! See the header below. I remember Ralf writing of this being a compatibility call with RISC/OS (is it the original OS of MIPS, Inc.?), IIRC. Ralf: am I right? > So apparently MIPS_ATOMIC_SET was invented for Linux only, probably just to > implement _test_and_set(). (It would be interesting to see how IRIX implement > _test_and_set() on MIPS I machines. However, the machine I have access uses > ll/sc instructions). Does IRIX actually run on anything below ISA II? > To me, either 1.a) or 2) is fine with me, although I have a slight faovr over > 2) (perhaps because I don't like assembly code and the extra "vertical" > calling layer introduced in 1.a) What about 3) -- a new syscall with a different semantics and no need to care about limitations of current implementations (especially the sysmips() bag). I've just sent a proposal for discussion. I'm looking forward for constructive feedback. Maciej -- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@ds2.pg.gda.pl, PGP key available +
