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ae638c0850
- Get clone() working on FreeBSD - Increase some Python build quotas - Add more atomic builtins to chibicc - Fix ASAN poisoning of alloca() memory - Make MODE= mandatory link path tinier - Improve the examples folder a little bit - Start working on some more resource limits - Make the linenoise auto-complete UI as good as GNU readline - Update compile.com, avoiding AVX codegen on non-AVX systems - Make sure empty path to syscalls like opendir raises ENOENT - Correctly polyfill ENOENT vs. ENOTDIR on the New Technology - Port bestline's paredit features to //third_party/linenoise - Remove workarounds for RHEL 5.0 bugs that were fixed in 5.1
21 lines
743 B
C
21 lines
743 B
C
#ifndef COSMOPOLITAN_LIBC_INTRIN_ONCE_H_
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#define COSMOPOLITAN_LIBC_INTRIN_ONCE_H_
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#include "libc/intrin/spinlock.h"
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#define _once(x) \
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({ \
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typeof(x) oncerc; \
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static bool once; \
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static typeof(oncerc) onceresult; \
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_Alignas(64) static char oncelock; \
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_spinlock(&oncelock); \
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if (once) { \
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oncerc = onceresult; \
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} else { \
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oncerc = onceresult = x; \
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} \
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_spunlock(&oncelock); \
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oncerc; \
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})
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#endif /* COSMOPOLITAN_LIBC_INTRIN_ONCE_H_ */
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