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| author | Berke Güzel <wenekar1@gmail.com> | 2026-10-15 12:37:10 +0300 |
|---|---|---|
| committer | Berke Güzel <wenekar1@gmail.com> | 2026-10-15 12:37:10 +0300 |
| commit | e3d8fe4854a7ef7ff0637688cda9e65feb680122 (patch) | |
| tree | 56bc226a49b7a706e078923434cb9fb05bab6e21 /tools | |
| parent | 5f03033b0e211f9ed13e7a1351f9a8f9011ab665 (diff) | |
Replace the writer spin lock with a blocking mutex
term_write_begin spun on an atomic sequence word. A waiter burned CPU,
and with no priority inheritance a SCHED_FIFO waiter could starve a
preempted holder on the same CPU. The writer section is now a pthread
mutex with PTHREAD_PRIO_INHERIT where the platform has it, and an SRWLOCK
on Windows. Re-entry on the owning thread still only counts the depth.
The platform wrapper (init, lock, unlock, destroy) is in compat.h. term_new
initializes the mutex, and term_free destroys it. Meson links the thread
library into the core, term_dep, and term_internal_dep. The README,
term.h, and the amalgamation note say that POSIX needs -pthread.
Tests: the feed and snapshot thread test now checks the final screen and
history against a serial reference. A new test checks that term_lock
nests and that another thread waits for the last term_unlock.
Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/amalgamate.py | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/amalgamate.py b/tools/amalgamate.py index f2cdf3b..09c6c91 100644 --- a/tools/amalgamate.py +++ b/tools/amalgamate.py @@ -3,7 +3,7 @@ term.h joins the public headers. term.c joins every source file and puts each private header in at its first include. A host compiles term.c once, -with any C11 compiler, and links libm. +with any C11 compiler, and links libm and the thread library. amalgamate.py TERM_DIR OUT_DIR [DEPFILE] |