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fix(v4.0.0): wire review round 1 -- tests for the wake-up order and for waking only on enough room; no overflow moving a message; sleep for impossible room answers at once

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
rajames
2026-10-08 14:12:33 -04:00
co-authored by Claude Opus 5.5
parent d5cd64605d
commit 83694b18be
6 changed files with 68 additions and 6 deletions
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v4/src/fabric.c
+2 -2
View File
@@ -370,8 +370,8 @@ static int operate(v4_fabric *f, unsigned id, v4_cell *how)
break;
case 9: /* sleep for room */
if (!tx) { *how = V4_WIRE_NO_ONE; break; }
if (a < 0) { *how = V4_WIRE_NOT_A_MESSAGE; break; }
if (a <= (v4_cell)V4_WIRE_CELLS && v4_wire_room(tx, (unsigned)a) == V4_WIRE_DONE) { *how = V4_WIRE_DONE; break; }
if (a < 0 || a > (v4_cell)V4_WIRE_CELLS) { *how = V4_WIRE_NO_ROOM; break; } /* no waiting can make that room */
if (v4_wire_room(tx, (unsigned)a) == V4_WIRE_DONE) { *how = V4_WIRE_DONE; break; }
if (!arrived(f, id)) return 0;
*how = V4_WIRE_NO_ROOM;
break;
v4/src/wire.c
+1 -1
View File
@@ -118,7 +118,7 @@ int v4_wire_move(v4_wire_queue *from, v4_wire_queue *to)
if (from == to || v4_wire_room(to, n) != V4_WIRE_DONE) return V4_WIRE_NO_ROOM;
at = back(to, n);
for (i = 0; i < n; i++) to->cell[slot(to, at + i)] = from->cell[slot(from, from->mark + i)];
to->cell[slot(to, at + 3u)] = (v4_cell)(from->cell[slot(from, from->mark + 3u)] - 1);
to->cell[slot(to, at + 3u)] = (v4_cell)((v4_ucell)from->cell[slot(from, from->mark + 3u)] - 1u); /* in the unsigned type: no overflow at the least cell */
remove_marked(from);
return V4_WIRE_DONE;
}