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https://github.com/jart/cosmopolitan.git
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695f74035d
This more accurately reflects how the kernels actually implement this function and it most importantly avoids incurring startup latency.
16 lines
466 B
C
16 lines
466 B
C
#ifndef COSMOPOLITAN_LIBC_YIELD_H_
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#define COSMOPOLITAN_LIBC_YIELD_H_
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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#ifdef _COSMO_SOURCE
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static inline void spin_yield(void) {
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#if defined(__GNUC__) && defined(__aarch64__)
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__asm__ volatile("yield");
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#elif defined(__GNUC__) && (defined(__x86_64__) || defined(__i386__))
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__asm__ volatile("pause");
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#endif
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}
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#endif /* _COSMO_SOURCE */
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_YIELD_H_ */
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