asciilifeform: 'Existing implementations of mmap() return the value -1 when unsuccessful. Since the casting of this value to type void * cannot be guaranteed by the ISO C standard to be distinct from a successful value, this volume of POSIX.1-2008 defines the symbol MAP_FAILED, which a conforming implementation does not return as the result of a successful call.'

asciilifeform: and we find this gem :

asciilifeform: sooo let's visit the posix folx, while we're at it,

asciilifeform: but linus did love to brag, 'nobody promised you a stable abi', as if this were a point of pride.

asciilifeform: mircea_popescu: if it ever were to change, ~100% of the contents of your box would barf

asciilifeform: ( now that i think about it, we could also obtain the eggog code by invoking a mmap that will be certain to fail, and recording the result. but ugghh... )

asciilifeform: so instead we have this explicit constant.

asciilifeform: note, again, we cannot compare to -1, because we are using a sane language, where '-1' is not a valid address of anything, nor even a valid modular-type

asciilifeform: but it ain't a -1 to us, because we are using a sane language and it is treated ONLY as the addr of the beginning of the allocated mmap. but first gotta check for the failure. so this requires a comparison to FFFFF....[buswidthsize]

asciilifeform: ( because unix was dropped as a child, it uses in-band idiocy and magic failure values that are not type-distinguishable from successes )

asciilifeform: i probably oughta explain why we even have this MAP_FAILED : constant Address := System'To_Address(16#FFFFFFFFFFFFFFFF#);

asciilifeform: ( they are, per standard, equivalent forms, but possibly stock gcc is broken in this particular spot )

asciilifeform: try To_Address instead of System'To_Address

asciilifeform: what can i say, the statement is 100% legal per the standard

asciilifeform: throw it out and get the proper one.

asciilifeform: your gnat is certifiably broken, then

asciilifeform: ( 'image' -- for the uninitiated -- is the operation sometimes called 'to-string' in other languages )

asciilifeform: it won't actually matter in any of my properly (v-genesis) released material -- i have no plan to use gnat's standard io for anything

asciilifeform: standard, iirc, permits the variant.

asciilifeform: diana_coman: in this particular example, can debate which is the useful-stricter

asciilifeform: mod6 recently ran into exact same issue, but for some reason i can't turn it up in the log

asciilifeform: diana_coman: the example was written on a box with adacore's gnat; the stock gnu one is stricter, doesn't permit Foo'Image -- instead you gotta FooTypeName'Image(Foo) ☟︎

asciilifeform: ( though it is not why i made an mmaptron )

asciilifeform: diana_coman: mmaps offer yet another method of glue -- theoretically 2+ processes can simply share it

asciilifeform: incidentally diana_coman et al might find the paste interesting -- it demonstrates, also, ada/c glue.

asciilifeform: ( makes a 1G mmap, and twiddles a byte therein )

asciilifeform: comes with a small test routine, see horsecocks.adb.

asciilifeform: ~400 ln total.

asciilifeform: what you get, is ability to mmapize arbitrary data structure

asciilifeform: mod6, phf , et al : http://nosuchlabs.com/pub/ada/horsecocks.tar.gz << i dun recall posting this before, so here it will live, for nao : unofficial release of mmaptron ☟︎☟︎☟︎☟︎☟︎

asciilifeform: ( is it even possible, at this point, to identify species of it !? )

asciilifeform: BingoBoingo: you have more in common with your stone age great^n-parent, than the current hela has with original

asciilifeform: ( in continuation of the eternal http://btcbase.org/log/2017-04-02#1635945 thread!111 ) ☝︎

asciilifeform: ( see the old dragonfly thread... )

asciilifeform: i.e. the only kind of system that could even in principle contain room for massive-improvements

asciilifeform: the accidental-pile is the lure for improvement-hunters to begin with

asciilifeform: goes to shit

asciilifeform: mircea_popescu: best analogy i can think of -- 'xerocopy of xerocopy...'

asciilifeform: i.e. the thing was jumpered out 'for a reason'

asciilifeform: BingoBoingo: fashionable, in those days, idea, was to 'make unaging tissue' by reenabling telomerase (normally jumpered out, in most tissue). but -- somewhat unsurprisingly -- it turned out to be a 'glue the gas gauge needle to 'full'' sort of thing

asciilifeform: this, now that i think of it, is a universal annoyance, in other walks of life also

asciilifeform: BingoBoingo: hard part is 'divides infinitely'+'still useful, rather than tumorous liquishit with 500 chromosomes'

asciilifeform: BingoBoingo: as you can probably guess if you think about it for 5min -- this isn't the hard part

asciilifeform: apparently a tru winner : asciilifeform couldn't even make a methuselah bone marrow stem cell, had to leave the entire business !111

asciilifeform: 'I can't imagine having kids, i worry enough about the impact of #climatechange on my cats' << loller

asciilifeform: 'der orden unter dem totenkopf'

asciilifeform: iirc there is an english version also

asciilifeform: the strychnine whippings didn't go on offer till later

asciilifeform: and mircea_popescu knows very well that puritan reich does not 'supply whores in paris', or even in bmore. instead it sacks inconvenient presidents, generals, etc. under the guise of 'immoral conduct unbefitting officer' for simply having been seen to fuck something