mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-07-15 23:29:56 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

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

4
third_party/nsync/cv.h vendored
View file

@ -144,7 +144,7 @@ int nsync_cv_wait(nsync_cv *cv, nsync_mu *mu);
mostly in tests and trivial examples than they are in real
programmes. */
int nsync_cv_wait_with_deadline(nsync_cv *cv, nsync_mu *mu,
nsync_time abs_deadline,
int clock, nsync_time abs_deadline,
struct nsync_note_s_ *cancel_note);
/* Like nsync_cv_wait_with_deadline(), but allow an arbitrary lock *v to be
@ -152,7 +152,7 @@ int nsync_cv_wait_with_deadline(nsync_cv *cv, nsync_mu *mu,
int nsync_cv_wait_with_deadline_generic(nsync_cv *cv, void *mu,
void (*lock)(void *),
void (*unlock)(void *),
nsync_time abs_deadline,
int clock, nsync_time abs_deadline,
struct nsync_note_s_ *cancel_note);
COSMOPOLITAN_C_END_