mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 03:27:39 +00:00
3c61a541bd
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.
17 lines
446 B
C
17 lines
446 B
C
#ifndef NSYNC_FUTEX_INTERNAL_H_
|
|
#define NSYNC_FUTEX_INTERNAL_H_
|
|
#include "libc/calls/struct/timespec.h"
|
|
#include "libc/dce.h"
|
|
COSMOPOLITAN_C_START_
|
|
|
|
#ifndef __cplusplus
|
|
#define _FUTEX_ATOMIC(x) _Atomic(x)
|
|
#else
|
|
#define _FUTEX_ATOMIC(x) x
|
|
#endif
|
|
|
|
int nsync_futex_wake_(_FUTEX_ATOMIC(int) *, int, char);
|
|
int nsync_futex_wait_(_FUTEX_ATOMIC(int) *, int, char, int, const struct timespec *);
|
|
|
|
COSMOPOLITAN_C_END_
|
|
#endif /* NSYNC_FUTEX_INTERNAL_H_ */
|