lumbda/docs/c-architecture.dot
russell@unturf.com f7352b51b0 rename: uncommonlisp -> lumbda throughout the repo
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.
2026-04-19 10:20:11 -04:00

71 lines
2.6 KiB
Text

// C implementation architecture
// "A diagram is worth 10,000 words." — russell@unturf.com
digraph c_arch {
rankdir=TB
node [shape=box, style=filled, fontname="Helvetica"]
edge [fontname="Helvetica", fontsize=10]
subgraph cluster_input {
label="Input"
style=dashed
source [label=".lsp source" fillcolor="#e8f4fd"]
cli [label="CLI flags\n-e --fast --jit" fillcolor="#e8f4fd"]
}
subgraph cluster_frontend {
label="Frontend (reader.c)"
style=rounded
color="#666666"
tokenizer [label="Tokenizer\nregex-free\nchar-by-char" fillcolor="#fff3cd"]
parser [label="Parser\nrecursive descent\n→ Pair/Value AST" fillcolor="#fff3cd"]
}
subgraph cluster_types {
label="Types (types.c, lumbda.h)"
style=rounded
color="#666666"
nanbox [label="NaN-Boxing\n64-bit doubles\ntype tags in NaN payload\nzero-alloc numbers" fillcolor="#e2d5f1"]
intern [label="Symbol Interning\nhash table" fillcolor="#e2d5f1"]
pairs [label="Cons Cells\n16 bytes (car+cdr)" fillcolor="#e2d5f1"]
envs [label="Environment\nhash-map bindings\nparent chain + global shortcut" fillcolor="#e2d5f1"]
}
subgraph cluster_eval {
label="Three Execution Tiers"
style=rounded
color="#666666"
interp [label="Tree-Walker\nleval()\nTCO via while loop\nall special forms" fillcolor="#d4edda"]
bytecode [label="Bytecode VM\ncompile → execute\nsuperinstructions\nSELF_TAIL_CALL" fillcolor="#cce5ff"]
jit [label="x86_64 JIT\nmmap(PROT_EXEC)\nnative machine code\nif/cond/let/named-let\ncar/cdr/cons\n10-24x faster than CPython" fillcolor="#ff6b6b" fontcolor=white]
}
subgraph cluster_jit_detail {
label="JIT Pipeline (jit.c)"
style=rounded
color="#cc0000"
analyze [label="AST Analysis\ncan_jit_proc()" fillcolor="#ffcccc"]
emit [label="x86_64 Emission\nmov/add/sub/cmp\ncall/ret/jmp" fillcolor="#ffcccc"]
mmap [label="mmap()\nPROT_READ|WRITE|EXEC\nfunction pointer" fillcolor="#ffcccc"]
}
source -> tokenizer
cli -> tokenizer
tokenizer -> parser
parser -> interp [label="default"]
parser -> bytecode [label="--fast"]
parser -> analyze [label="--jit"]
analyze -> emit [label="jittable"]
analyze -> interp [label="fallback" style=dashed]
emit -> mmap
mmap -> jit [label="JitFunc"]
interp -> envs
bytecode -> envs
jit -> nanbox [label="unbox/rebox"]
envs -> nanbox
nanbox -> intern
nanbox -> pairs
{rank=same; interp; bytecode; jit}
{rank=same; analyze; emit; mmap}
}