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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.
43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
#ifndef COSMOPOLITAN_LIBC_SYSV_CONSTS_CLOCK_H_
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#define COSMOPOLITAN_LIBC_SYSV_CONSTS_CLOCK_H_
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COSMOPOLITAN_C_START_
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extern const int CLOCK_BOOTTIME;
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extern const int CLOCK_BOOTTIME_ALARM;
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extern const int CLOCK_MONOTONIC;
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extern const int CLOCK_MONOTONIC_COARSE;
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extern const int CLOCK_MONOTONIC_FAST;
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extern const int CLOCK_MONOTONIC_PRECISE;
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extern int CLOCK_MONOTONIC_RAW;
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extern int CLOCK_MONOTONIC_RAW_APPROX;
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extern const int CLOCK_PROCESS_CPUTIME_ID;
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extern const int CLOCK_PROF;
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extern const int CLOCK_REALTIME_ALARM;
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extern const int CLOCK_REALTIME_COARSE;
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extern const int CLOCK_REALTIME_FAST;
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extern const int CLOCK_REALTIME_PRECISE;
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extern const int CLOCK_SECOND;
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extern const int CLOCK_TAI;
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extern const int CLOCK_THREAD_CPUTIME_ID;
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extern const int CLOCK_UPTIME;
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extern const int CLOCK_UPTIME_FAST;
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extern const int CLOCK_UPTIME_PRECISE;
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COSMOPOLITAN_C_END_
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#define CLOCK_REALTIME 0
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#define CLOCK_REALTIME_FAST CLOCK_REALTIME_FAST
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#define CLOCK_REALTIME_PRECISE CLOCK_REALTIME_PRECISE
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#define CLOCK_REALTIME_COARSE CLOCK_REALTIME_COARSE
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#define CLOCK_MONOTONIC CLOCK_MONOTONIC
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#define CLOCK_MONOTONIC_RAW CLOCK_MONOTONIC_RAW
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#define CLOCK_MONOTONIC_RAW_APPROX CLOCK_MONOTONIC_RAW_APPROX
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#define CLOCK_MONOTONIC_FAST CLOCK_MONOTONIC_FAST
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#define CLOCK_MONOTONIC_PRECISE CLOCK_MONOTONIC_PRECISE
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#define CLOCK_MONOTONIC_COARSE CLOCK_MONOTONIC_COARSE
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#define CLOCK_THREAD_CPUTIME_ID CLOCK_THREAD_CPUTIME_ID
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#define CLOCK_PROCESS_CPUTIME_ID CLOCK_PROCESS_CPUTIME_ID
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#endif /* COSMOPOLITAN_LIBC_SYSV_CONSTS_CLOCK_H_ */
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