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cosmopolitan/third_party/nsync
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Justine Tunney a359de7893
Get rid of kmalloc() 
This changes *NSYNC to allocate waiters on the stack so our locks don't
need to depend on dynamic memory. This make our runtiem simpler, and it
also fixes bugs with thread cancellation support.
2023-09-11 21:56:00 -07:00
..
mem Get rid of kmalloc() 2023-09-11 21:56:00 -07:00
testing Get rid of kmalloc() 2023-09-11 21:56:00 -07:00
array.internal.h Clean up some sleep code 2022-10-08 03:00:48 -07:00
atomic.h Validate privileged code relationships 2023-06-08 04:38:06 -07:00
atomic.internal.h Add shared memory apis to redbean 2022-10-06 04:55:26 -07:00
common.c Get rid of kmalloc() 2023-09-11 21:56:00 -07:00
common.internal.h Get rid of kmalloc() 2023-09-11 21:56:00 -07:00
compat.S Make improvements 2023-06-15 14:50:53 -07:00
counter.h Clean up more code 2023-07-06 08:03:24 -07:00
cv.h Clean up more code 2023-07-06 08:03:24 -07:00
debug.h Use *NSYNC for POSIX threads locking APIs 2022-09-11 11:04:50 -07:00
futex.c Fix warnings 2023-09-01 20:50:18 -07:00
futex.internal.h Fix warnings 2023-09-01 20:50:18 -07:00
heap.internal.h Clean up some sleep code 2022-10-08 03:00:48 -07:00
LICENSE.txt Use *NSYNC for POSIX threads locking APIs 2022-09-11 11:04:50 -07:00
mu.c Get rid of kmalloc() 2023-09-11 21:56:00 -07:00
mu.h Clean up more code 2023-07-06 08:03:24 -07:00
mu_semaphore.c Get rid of kmalloc() 2023-09-11 21:56:00 -07:00
mu_semaphore.h Get rid of kmalloc() 2023-09-11 21:56:00 -07:00
mu_semaphore.internal.h Get rid of kmalloc() 2023-09-11 21:56:00 -07:00
mu_semaphore_futex.c Fix warnings 2023-09-01 20:50:18 -07:00
mu_semaphore_gcd.c Get rid of kmalloc() 2023-09-11 21:56:00 -07:00
mu_semaphore_sem.c Get rid of kmalloc() 2023-09-11 21:56:00 -07:00
mu_wait.h Use *NSYNC for POSIX threads locking APIs 2022-09-11 11:04:50 -07:00
note.h Use *NSYNC for POSIX threads locking APIs 2022-09-11 11:04:50 -07:00
nsync.mk Make more fixes and improvements 2023-07-29 18:44:15 -07:00
once.h Use *NSYNC for POSIX threads locking APIs 2022-09-11 11:04:50 -07:00
panic.c Remove some dead code 2023-07-03 02:48:29 -07:00
races.internal.h Add *NSYNC mu_test 2022-09-11 18:56:29 -07:00
README.cosmo Get rid of kmalloc() 2023-09-11 21:56:00 -07:00
README.md Add *NSYNC to libc/isystem 2022-09-13 01:47:12 -07:00
time.h Improve cancellations, randomness, and time 2022-11-05 23:45:32 -07:00
wait_s.internal.h Clean up more code 2023-07-06 08:03:24 -07:00
waiter.h Use *NSYNC for POSIX threads locking APIs 2022-09-11 11:04:50 -07:00
waiter_per_thread.c Use *NSYNC for POSIX threads locking APIs 2022-09-11 11:04:50 -07:00
yield.c Make improvements 2022-11-07 02:26:06 -08:00

README.md

*NSYNC

*NSYNC is a library providing scalable synchronization primitives. The following packages are provided:

  • THIRD_PARTY_NSYNC has nsync_mu which doesn't depend on malloc().
  • THIRD_PARTY_NSYNC_MEM has the rest of *NSYNC, e.g. nsync_cv.

The origin of this code is here:

git@github.com:google/nsync
ac5489682760393fe21bd2a8e038b528442412a7 (1.25.0)
Author: Mike Burrows <m3b@google.com>
Date:   Wed Jun 1 16:47:52 2022 -0700

NSYNC uses the Apache 2.0 license. We made the following local changes:

  • Write custom nsync_malloc_() so malloc() can use *NSYNC.

  • Rewrite futex() wrapper to support old Linux kernels and OpenBSD.

  • Normalize sources to Cosmopolitan style conventions; *NSYNC upstream supports dozens of compilers and operating systems, at compile-time. Since Cosmo solves portability at runtime instead, most of the build config toil has been removed, in order to help the NSYNC source code be more readable and hackable.