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https://github.com/jart/cosmopolitan.git
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046c7ebd4a
- Introduce fast spinlock API - Double rand64() perf w/ spinlock - Improve raise() on New Technology - Support gettid() across platforms - Implement SA_NODEFER on New Technology - Move the lock intrinsics into LIBC_INTRIN - Make SIGTRAP recoverable on New Technology - Block SIGCHLD in wait4() on New Technology - Add threading prototypes for XNU and FreeBSD - Rewrite abort() fixing its minor bugs on XNU/NT - Shave down a lot of the content in libc/bits/bits.h - Let signal handlers modify CPU registers on New Technology
15 lines
552 B
C
15 lines
552 B
C
#ifndef COSMOPOLITAN_LIBC_TIME_CLOCKSTONANOS_INTERNAL_H_
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#define COSMOPOLITAN_LIBC_TIME_CLOCKSTONANOS_INTERNAL_H_
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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static inline uint64_t ClocksToNanos(uint64_t x, uint64_t y) {
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// approximation of round(x*.323018) which is usually
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// the ratio between inva rdtsc ticks and nanoseconds
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uint128_t difference = x - y;
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return (difference * 338709) >> 20;
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}
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_TIME_CLOCKSTONANOS_INTERNAL_H_ */
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