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fec396037a
We now have a high-quality clone() implementation for creating lightweight threads on Linux/Windows/FreeBSD/NetBSD/OpenBSD.
29 lines
857 B
C
29 lines
857 B
C
#ifndef COSMOPOLITAN_LIBC_INTRIN_SETJMP_INTERNAL_H_
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#define COSMOPOLITAN_LIBC_INTRIN_SETJMP_INTERNAL_H_
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#include "libc/limits.h"
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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/**
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* Encodes nonzero number for longjmp().
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*
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* This is a workaround to the fact that the value has to be non-zero.
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* So we work around it by dedicating the highest bit to being a flag.
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*/
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static inline int EncodeLongjmp(int x) {
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return x | INT_MIN;
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}
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/**
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* Decodes nonzero number returned by setjmp().
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*
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* This is a workaround to the fact that the value has to be non-zero.
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* So we work around it by dedicating the highest bit to being a flag.
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*/
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static inline int DecodeSetjmp(int x) {
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return (int)((unsigned)x << 1) >> 1;
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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_INTRIN_SETJMP_INTERNAL_H_ */
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