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cosmopolitan/libc/thread
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Justine Tunney 2f48a02b44
Make recursive mutexes faster 
Recursive mutexes now go as fast as normal mutexes. The tradeoff is they
are no longer safe to use in signal handlers. However you can still have
signal safe mutexes if you set your mutex to both recursive and pshared.
You can also make functions that use recursive mutexes signal safe using
sigprocmask to ensure recursion doesn't happen due to any signal handler

The impact of this change is that, on Windows, many functions which edit
the file descriptor table rely on recursive mutexes, e.g. open(). If you
develop your app so it uses pread() and pwrite() then your app should go
very fast when performing a heavily multithreaded and contended workload

For example, when scaling to 40+ cores, *NSYNC mutexes can go as much as
1000x faster (in CPU time) than the naive recursive lock implementation.
Now recursive will use *NSYNC under the hood when it's possible to do so
2024-09-10 00:08:59 -07:00
..
alarm.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
BUILD.mk Make malloc() go 200x faster 2024-06-05 02:02:14 -07:00
freebsd.internal.h Introduce pthread_condattr_setclock() 2024-09-02 23:45:42 -07:00
getitimer.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
getstackbottom.c Rewrite memory manager 2024-06-22 05:45:11 -07:00
itimer.c Introduce pthread_condattr_setclock() 2024-09-02 23:45:42 -07:00
itimer.internal.h Reduce header complexity 2023-11-28 14:39:42 -08:00
lock.h Test recursive mutex code more 2024-09-09 00:19:23 -07:00
makecontext.c Remove .internal from more header filenames 2024-08-04 12:52:25 -07:00
mktls.c Remove .internal from more header filenames 2024-08-04 12:52:25 -07:00
openbsd.internal.h Rewrite memory manager 2024-06-22 05:45:11 -07:00
posixthread.internal.h Update Musl Libc code 2024-07-30 22:51:29 -07:00
pt.internal.h Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_attr_destroy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_getdetachstate.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_getguardsize.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_attr_getinheritsched.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_getschedparam.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_getschedpolicy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_getscope.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_getsigaltstack_np.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_attr_getsigaltstacksize_np.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_attr_getsigmask_np.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
pthread_attr_getstack.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_getstacksize.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_init.c Make some improvements of little consequence 2024-07-27 08:20:18 -07:00
pthread_attr_setdetachstate.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_setguardsize.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_attr_setinheritsched.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_setschedparam.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_setschedpolicy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_setscope.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_setsigaltstack_np.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_attr_setsigaltstacksize_np.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_attr_setsigmask_np.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_setstack.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_attr_setstacksize.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_barrier_destroy.c Make more improvements to threads and mappings 2024-07-24 01:19:54 -07:00
pthread_barrier_init.c Make more improvements to threads and mappings 2024-07-24 01:19:54 -07:00
pthread_barrier_wait.c Introduce pthread_condattr_setclock() 2024-09-02 23:45:42 -07:00
pthread_barrierattr_destroy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_barrierattr_getpshared.c Make more improvements to threads and mappings 2024-07-24 01:19:54 -07:00
pthread_barrierattr_init.c Make more improvements to threads and mappings 2024-07-24 01:19:54 -07:00
pthread_barrierattr_setpshared.c Make more improvements to threads and mappings 2024-07-24 01:19:54 -07:00
pthread_cancel.c Fix bugs in poll(), select(), ppoll(), and pselect() 2024-09-02 00:29:52 -07:00
pthread_cond_broadcast.c Make Cosmo mutexes competitive with Apple Libc 2024-09-02 19:03:11 -07:00
pthread_cond_destroy.c Add unit test for process shared conditions 2024-07-22 18:48:54 -07:00
pthread_cond_init.c Make recursive mutexes faster 2024-09-10 00:08:59 -07:00
pthread_cond_signal.c Make recursive mutexes faster 2024-09-10 00:08:59 -07:00
pthread_cond_timedwait.c Make recursive mutexes faster 2024-09-10 00:08:59 -07:00
pthread_cond_wait.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_condattr_destroy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_condattr_getclock.c Delve into clock rabbit hole 2024-09-04 01:32:46 -07:00
pthread_condattr_getpshared.c Introduce pthread_condattr_setclock() 2024-09-02 23:45:42 -07:00
pthread_condattr_init.c Introduce pthread_condattr_setclock() 2024-09-02 23:45:42 -07:00
pthread_condattr_setclock.c Delve into clock rabbit hole 2024-09-04 01:32:46 -07:00
pthread_condattr_setpshared.c Introduce pthread_condattr_setclock() 2024-09-02 23:45:42 -07:00
pthread_create.c Remove .internal from more header filenames 2024-08-04 12:52:25 -07:00
pthread_decimate_np.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_detach.c Delve into clock rabbit hole 2024-09-04 01:32:46 -07:00
pthread_equal.c Add much of C11 threads.h API 2024-04-28 07:04:08 -07:00
pthread_exit.c Freshen build/bootstrap/cocmd 2024-07-27 23:22:11 -07:00
pthread_getaffinity_np.c Make some improvements of little consequence 2024-07-27 08:20:18 -07:00
pthread_getattr_np.c Remove .internal from more header filenames 2024-08-04 12:52:25 -07:00
pthread_getname_np.c Remove .internal from more header filenames 2024-08-04 12:52:25 -07:00
pthread_getschedparam.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_getspecific.c Make malloc() go 200x faster 2024-06-05 02:02:14 -07:00
pthread_getthreadid_np.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_getunique_np.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_join.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_key_create.c Make POSIX threads improvements 2024-06-30 15:38:59 -07:00
pthread_key_delete.c Make POSIX threads improvements 2024-06-30 15:38:59 -07:00
pthread_kill.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
pthread_once.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_reschedule.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_rwlock_destroy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_rwlock_init.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_rwlock_rdlock.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_rwlock_tryrdlock.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_rwlock_trywrlock.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_rwlock_unlock.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_rwlock_wrlock.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_rwlockattr_destroy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_rwlockattr_getpshared.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_rwlockattr_init.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_rwlockattr_setpshared.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_self.c Add much of C11 threads.h API 2024-04-28 07:04:08 -07:00
pthread_setaffinity_np.c Make some improvements of little consequence 2024-07-27 08:20:18 -07:00
pthread_setcanceltype.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
pthread_setname_np.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
pthread_setschedparam.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_setschedparam_freebsd.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_setschedprio.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_sigmask.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_timedjoin_np.c Delve into clock rabbit hole 2024-09-04 01:32:46 -07:00
pthread_tryjoin_np.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_zombify.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
README.md Use *NSYNC for POSIX threads locking APIs 2022-09-11 11:04:50 -07:00
sem_destroy.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
sem_getvalue.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
sem_init.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
sem_open.c Support process shared condition variables 2024-07-22 16:35:29 -07:00
sem_post.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
sem_timedwait.c Introduce pthread_condattr_setclock() 2024-09-02 23:45:42 -07:00
sem_trywait.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
sem_wait.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
semaphore.h Remove bad defines from early days of project 2024-07-24 12:11:21 -07:00
setitimer.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
thrd_create.c Add much of C11 threads.h API 2024-04-28 07:04:08 -07:00
thrd_detach.c Add much of C11 threads.h API 2024-04-28 07:04:08 -07:00
thrd_join.c Add much of C11 threads.h API 2024-04-28 07:04:08 -07:00
thread.h Make recursive mutexes faster 2024-09-10 00:08:59 -07:00
thread2.h Add dontthrow attribute to most libc functions 2024-01-09 01:26:03 -08:00
threads.h Remove more _Atomic keywords from public headers 2024-07-24 13:56:03 -07:00
tls.h Update Musl Libc code 2024-07-30 22:51:29 -07:00
tls2.internal.h Add back missing TlsAlloc() call 2024-07-21 20:45:27 -07:00
ualarm.c Delve into clock rabbit hole 2024-09-04 01:32:46 -07:00
xnu.internal.h Reduce header complexity 2023-11-28 14:39:42 -08:00

README.md

Cosmpolitan POSIX Threads Library

Cosmopolitan Libc implements threading as it is written in The Open Group Base Specifications Issue 7, 2018 edition IEEE Std 1003.1-2017 (Revision of IEEE Std 1003.1-2008) in addition to GNU extensions.