v1.18.0

libxtc (1.18.0-1) unstable; urgency=medium

• Code-quality cleanup (no functional change; net -225 lines). From a
  read-only audit against DRY/KISS/SRP/Clean-Code, three verified,
  behavior-preserving refactors:
  • Extracted the fiber-stack pool and the S1 stack-reclaim lever
    (previously duplicated near-identically between the fcontext and
    ucontext coroutine substrates) into a new internal
    src/inc/coro_common.h that both mmap-based substrates include.
    Verified byte-faithful across default(uctx), forced-fctx, ASan
    (detect_stack_use_after_return=1), and clang ThreadSanitizer.
  • Factored the repeated "cancel park timer + clear field" idiom
    (10 inline copies across sync.c, lock_mgr.c, proc.c) into
    __xtc_task_cancel_park_timer().
  • Consistency: fsm.c/reg.c/xproc.c freed library-allocated recv
    buffers with xtc_free; converted to __os_free to match the rest
    of the library (xtc_free is the consumer alias, literally
    { __os_free(p); }, so this is pure consistency, not behavior).
    Renamed sync.c's __rd_ready/__wr_ready to __can_grant_read/write.
• No public xtc_* API change from 1.17.0.

-- Greg Burd greg@burd.me Sun, 12 Jul 2026 13:02:39 -0400