mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-05-29 16:52:28 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Introduce pthread_condattr_setclock()

Browse source 
This is one of the few POSIX APIs that was missing. It lets you choose a
monotonic clock for your condition variables. This might improve perf on
some platforms. It might also grant more flexibility with NTP configs. I
know Qt is one project that believes it needs this. To introduce this, I
needed to change some the *NSYNC APIs, to support passing a clock param.
There's also new benchmarks, demonstrating Cosmopolitan's supremacy over
many libc implementations when it comes to mutex performance. Cygwin has
an alarmingly bad pthread_mutex_t implementation. It is so bad that they
would have been significantly better off if they'd used naive spinlocks.
This commit is contained in:
Justine Tunney 2024-09-02 23:37:50 -07:00
parent 79516bf08e
commit 3c61a541bd
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
55 changed files with 449 additions and 155 deletions
Download patch file Download diff file Expand all files Collapse all files

3
libc/thread/freebsd.internal.h
View file

@ -47,7 +47,8 @@ struct _umtx_time {
uint32_t _clockid;
};
int sys_umtx_timedwait_uint(_Atomic(int) *, int, bool, const struct timespec *);
int sys_umtx_timedwait_uint(_Atomic(int) *, int, bool, int,
const struct timespec *);
COSMOPOLITAN_C_END_
#endif /* COSMOPOLITAN_LIBC_THREAD_FREEBSD_INTERNAL_H_ */