Chris Hanson [Sat, 6 Jan 2018 02:58:26 +0000 (21:58 -0500)]
Rewrite the bundle machinery to separate interface and predicate.
Change define-bundle-interface to require its definition names to be
spelled out in the definition rather than being constructed by the macro; the
result is much like define-record-type.
Change the bundle lookup to use a binary search rather than a linear search,
which will help when using large bundles. Although we might want to have a more
flexible search strategy since it's not exposed to the end user.
Add support for pretty-printing bundles similarly to records.
Matt Birkholz [Sat, 23 Dec 2017 09:52:49 +0000 (02:52 -0700)]
ffi: Peek C strings as non-legacy strings, else bytevectors.
When the FFI peeks at a C string (ASCII and null terminated) it now
copies the characters into a ustring (rather than a deprecated legacy
string). If the C string contains non-ASCII characters, the FFI
returns a bytevector, passing the decoding problem on to higher
levels, and avoiding an extra copy (from bytes to string) when no
translation is needed.
Add c-peek-csubstring, a version of c-peek-cstring that takes a byte
count and does NOT require the C string to be null terminated.
Add common integer bit string ffs, fls, ctz, and clz.
(ffs x): find first set, 1-indexed with 0 for 0
(fls x): find last set, 1-indexed with 0 for 0 (same as integer-length)
(ctz x): count trailing zeros (same as ffs)
((clz n) x): count leading zeros in n-bit word x
Matt Birkholz [Sat, 16 Sep 2017 22:06:17 +0000 (15:06 -0700)]
runtime/syncproc: Eliminate spinning, and blocking.
The run-shell-command spins when it is copying both stdin and stdout.
E.g.
(call-with-input-string "Lorem ipsum dolor sit amet\n"
(lambda (in)
(run-shell-command "sleep 10; cat" 'input in)))
will keep your machine busy for 10 seconds.
When it is not spinning, the procedure blocks for large bufferfuls.
During the evaluation of
(run-shell-command
"i=0; while [ $i -lt 5 ]; do echo $i; i=$[$i + 1]; sleep 1; done"
'redisplay-hook flush-output-port)
you will not see 5 lines of output, one each second, but all 5 lines
at once after 5 seconds, despite the redisplay hook [Linux 4.10.0
glibc 2.24].
This new copying process eliminates the blocking AND the spinning. It
keeps stdout in nonblocking mode and uses suspend-current-thread to
block. It handles short writes too. The ports sourcing/sinking
stdin/stdout are required to block.
Print is just the renamed Debug_Print, renamed for brevity in debugger
commands. Rename do_printing to print_object and punt the detailed_p
parameter, and the gotos, and handled_p. Move the bulky compiled
entry handling to a separate function: print_compiled_entry. Punt
checking for a "closed" stack frame in verify_stack().
Matt Birkholz [Sat, 16 Sep 2017 21:38:27 +0000 (14:38 -0700)]
microcode: Do not save history_register locally.
The required change to C_call_scheme is described but not implemented.
C_call_scheme has other problems(?). Preferring a rotated history to
a broken history (broken by a GC during a callback) for now.
Matt Birkholz [Sat, 16 Sep 2017 22:19:27 +0000 (15:19 -0700)]
ffi: Follow example of C_call_scheme; eliminate aborts.
Keep callouts simple, fast. Make callbacks save/restore machine state
(last_return_code, mainly) and use RC_END_OF_COMPUTATION instead of a
special primitive (return-to-c), like C_call_scheme. Punt the
pop_return_p parameter of Interpret; instead, leave #f in EXP and
Re_Enter_Interpreter, also like C_call_scheme. Add re_enter_scheme to
pop machine state pushed by abort_to_c (used when state cannot be
saved locally, as in the glib plugin's run_glib).
Matt Birkholz [Sun, 30 Jul 2017 22:39:21 +0000 (15:39 -0700)]
runtime/binary-port (close-binary-output-port): Close output chan.
Close-binary-output-port was not closing the output channel of a
binary IO port when input and output channels were not the same
(e.g. when the port is the IO of a subprocess). Close-binary-input-
port seemed to have the same thinko.
Matt Birkholz [Tue, 23 May 2017 23:44:55 +0000 (16:44 -0700)]
x11 plugin: Convert to iso8859-1 rather than utf8.
And avoid converting if the string is already ASCII. Also fix the
subsystem version number, and update README, NEWS, etc. following the
examples of the other plugins.