russell@unturf.com
f7352b51b0
Historical internal name "uncommonlisp" retired in favor of the
public name "lumbda" ahead of lumbda.com going live. Scope of
this commit:
Source files renamed:
uncommonlisp.py -> lumbda.py
asm/uncommonlisp.s -> asm/lumbda.s
c/uncommonlisp.h -> c/lumbda.h
whitepaper/uncommonlisp-whitepaper -> whitepaper/lumbda-whitepaper (.rst + .pdf)
Binaries renamed (tracked ones; c/ was always gitignored):
asm/uncommonlisp, asm/uncommonlisp-gc, asm/uncommonlisp.o,
asm/uncommonlisp-gc.o -> asm/lumbda(-gc)(.o)
c/.gitignore -> ignores lumbda
Internal string updates (sed pass ordered longest-first):
asm/uncommonlisp -> asm/lumbda
c/uncommonlisp -> c/lumbda
uncommonlisp.py -> lumbda.py
UNCOMMONLISP_BIN -> LUMBDA_BIN (asm/test.sh env var)
"uncommonlisp> " -> "lumbda> " (asm REPL prompt baked into binary)
UNCOMMONLISP -> LUMBDA (macros, comments)
uncommonlisp -> lumbda (prose)
Binary portal magic updated:
"ULPORTAL" -> "LUMBDAB1" # "Lumbda Binary v1"
Old portal files are not backward-compatible — this is a deliberate
break since it's the rename moment. S-expression portals already
carry their own ";; lumbda-portal v1" header and remain cleanly
versioned.
WHITEPAPER.pdf / WHITEPAPER.rst symlinks repointed to the renamed
files. Makefile's whitepaper target targets lumbda-whitepaper.pdf.
Not changed (intentional, separate phases):
- Filesystem directory /home/fox/git/uncommonlisp itself
(fox renames locally and the gitlab repo URL in a follow-up)
- tests.py hardcoded cwd=/home/fox/git/uncommonlisp
(matches the current on-disk location; will flip when the
directory rename ships)
- Git history (immutable; old commits still say uncommonlisp,
which is correct — that's what they were)
Verified:
137 asm no-GC + 137 asm GC + 571 Python + 83 C + 189 shared
functional tests all pass under the new names.
bench-gc-http (2000 req): all 4 cells behave as expected
(cells 1/2 flat, 3 leaks, 4 bounded at 1 chunk).
Python REPL, C REPL, asm REPL all start cleanly.
117 lines
4.3 KiB
Text
117 lines
4.3 KiB
Text
;;; http-server.lsp — portable HTTP/1.0 server in pure Scheme
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;;;
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;;; Runs identically in Python, C, and asm. The only primitives used are
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;;; the six socket builtins + display/string-append/substring.
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;;;
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;;; python3 lumbda.py --fast examples/http-server.lsp
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;;; ./c/lumbda examples/http-server.lsp
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;;; ./asm/lumbda < examples/http-server.lsp
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;;;
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;;; Default port 8080. First-line dispatch: GET / → greeting page.
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;;; GET /bench → 1 KB body for throughput benchmarks.
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;;; Other paths → 404.
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(define *port* 8080)
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(define *crlf* "\r\n")
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(define *crlf-crlf* "\r\n\r\n")
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;;; Request ceiling. Acts as a belt-and-suspenders cap under the
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;;; heap-snapshot loop below. The snapshot mechanism (asm only) rewinds
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;;; per-request allocations so memory stays O(1) regardless of ceiling.
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;;; On Python + C the GC handles this; the cap still bounds accidentally
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;;; runaway demo servers.
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(define *max-requests* 1000000)
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;;; heap-snapshot / heap-restore are available in all three impls.
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;;; On asm they rewind the bump allocator (recycling per-request
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;;; allocations in O(1) memory). On Python + C they are no-ops
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;;; because those runtimes already have a real GC.
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;;; ── HTTP helpers ─────────────────────────────────────────────
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(define (http-response status ctype body)
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(string-append
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"HTTP/1.0 " status *crlf*
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"Content-Type: " ctype *crlf*
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"Content-Length: " (number->string (string-length body)) *crlf*
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"Connection: close" *crlf-crlf*
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body))
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;; Compare via char->integer so we don't need char=? (asm lacks it).
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(define SPACE 32)
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(define (char-at s i) (char->integer (string-ref s i)))
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(define (first-token s)
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(let ((len (string-length s)))
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(let loop ((i 0))
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(cond
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((= i len) s)
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((= (char-at s i) SPACE) (substring s 0 i))
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(else (loop (+ i 1)))))))
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(define (second-token s)
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(let ((len (string-length s)))
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(let loop1 ((i 0))
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(cond
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((= i len) "")
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((= (char-at s i) SPACE)
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(let loop2 ((j (+ i 1)))
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(cond
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((= j len) (substring s (+ i 1) len))
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((= (char-at s j) SPACE) (substring s (+ i 1) j))
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(else (loop2 (+ j 1))))))
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(else (loop1 (+ i 1)))))))
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;;; ── Request handler ─────────────────────────────────────────
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(define *bench-body*
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;; ~1 KB payload so clients have something to measure throughput on.
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(let loop ((s "") (i 0))
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(if (= i 32) s
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(loop (string-append s "0123456789abcdef0123456789abcdef") (+ i 1)))))
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(define (handle-request req)
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(let ((path (second-token req)))
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(cond
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((string=? path "/")
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(http-response "200 OK" "text/html"
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"<!doctype html><title>lumbda</title><h1>feedback is all you need</h1><p>portable HTTP in Scheme.</p>"))
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((string=? path "/bench")
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(http-response "200 OK" "text/plain" *bench-body*))
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((string=? path "/hello")
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(http-response "200 OK" "text/plain" "hello world\n"))
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(else
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(http-response "404 Not Found" "text/plain"
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(string-append "not found: " path "\n"))))))
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;;; ── Main loop ───────────────────────────────────────────────
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;;; Top-level `server` and `server-loop`. The snapshot `snap` is
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;;; passed down as an explicit arg — this avoids any issue with
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;;; closures captured before/after the snapshot.
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(define server (tcp-listen *port*))
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(define (server-loop n snap)
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(if (>= n *max-requests*)
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(begin
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(display "request cap reached, exiting\n")
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(tcp-close server))
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(begin
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(let ((client (tcp-accept server)))
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(let ((req (tcp-recv client 4096)))
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(if (and req (> (string-length req) 0))
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(tcp-send client (handle-request req))
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#f))
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(tcp-close client))
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;; Rewind per-request allocations on asm; no-op elsewhere.
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(heap-restore snap)
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(server-loop (+ n 1) snap))))
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(define (serve)
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(display "lumbda http server on :") (display *port*)
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(display " (max ") (display *max-requests*) (display " requests)") (newline)
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(server-loop 0 (heap-snapshot)))
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(serve)
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