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37 lines
1.0 KiB
37 lines
1.0 KiB
4 months ago
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#pragma once
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#define _GNU_SOURCE
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#include <stdint.h>
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#include <sys/param.h>
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// Ensure we use a BSD powerof2 that works in static_assert (unlike glibc's).
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#undef powerof2
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#define powerof2(x) ((((x)-1)&(x))==0)
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// This is in BSD's <sys/param.h>.
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#define nitems(x) (sizeof((x))/sizeof((x)[0]))
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// This is used as the size of the write buffer of sectors.
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#define MAXPHYS (1024 * 1024)
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// On glibc, these headers use `__unused` as an identifier, so drag them in
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// first.
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#include <sys/stat.h>
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#if __has_include(<sys/sysctl.h>)
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#include <sys/sysctl.h>
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#endif
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// Bionic, like the BSDs, has __unused. glibc doesn't.
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#if defined(__GLIBC__)
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#define __unused __attribute__((__unused__))
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#endif
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// Neither macOS nor glibc has __packed.
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#if defined(__APPLE__) || defined(__GLIBC__)
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#define __packed __attribute__((__packed__))
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#endif
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// The BSDs (including Android and macOS) have getprogname(), but glibc doesn't.
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#if defined(__GLIBC__)
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#include <errno.h>
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static inline char* getprogname() { return program_invocation_short_name; }
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#endif
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