88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
#ifndef PROCPS_PROC_PROCPS_H
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#define PROCPS_PROC_PROCPS_H
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#ifdef __cplusplus
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#define EXTERN_C_BEGIN extern "C" {
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#define EXTERN_C_END }
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#else
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#define EXTERN_C_BEGIN
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#define EXTERN_C_END
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#endif
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// Some ports make the mistake of running a 32-bit userspace
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// on a 64-bit kernel. Shame on them. It's not at all OK to
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// make everything "long long", since that causes unneeded
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// slowness on 32-bit hardware.
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//
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// SPARC: 32-bit kernel is an ex-penguin, so use "long long".
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//
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// MIPS: Used for embedded systems and obsolete hardware.
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// Oh, there's a 64-bit version? SGI is headed toward IA-64,
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// so don't worry about 64-bit MIPS.
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//
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// PowerPC: Big ugly problem! Macs are popular. :-/
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//
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// Unknown: PA-RISC, zSeries, and x86-64
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//
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#if defined(k64test) || defined(__sparc__) // || defined(__mips__) || defined(__powerpc__)
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#define KLONG long long // not typedef; want "unsigned KLONG" to work
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#define KLF "L"
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#define STRTOUKL strtoull
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#else
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#define KLONG long
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#define KLF "l"
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#define STRTOUKL strtoul
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#endif
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#if !defined(restrict) && __STDC_VERSION__ < 199901
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#if __GNUC__ > 2 || __GNUC_MINOR__ >= 92 // maybe 92 or 95 ?
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#define restrict __restrict__
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#else
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#warning No restrict keyword?
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#define restrict
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#endif
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#endif
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// marks old junk, to warn non-procps library users
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#if ( __GNUC__ == 3 && __GNUC_MINOR__ > 0 ) || __GNUC__ > 3
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#define OBSOLETE __attribute__((deprecated))
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#else
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#define OBSOLETE
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#endif
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// available when?
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// Tells gcc that function is library-internal;
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// so no need to do dynamic linking at run-time.
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#if __GNUC__ > 2 // FIXME: total random guess that's sure to be wrong
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#define VISIBILITY_HIDDEN visibility("hidden")
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#else
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#define VISIBILITY_HIDDEN
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#endif
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// mark function for internal use
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#define HIDDEN __attribute__((VISIBILITY_HIDDEN))
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// given foo, create a foo_direct for internal use
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#define HIDDEN_ALIAS(x) extern __typeof(x) x##_direct __attribute__((alias(#x),VISIBILITY_HIDDEN))
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// since gcc-2.5
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#define NORETURN __attribute__((__noreturn__))
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#define FUNCTION __attribute__((__const__)) // no access to global mem, even via ptr, and no side effect
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#if __GNUC__ > 2 || __GNUC_MINOR__ >= 96
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// won't alias anything, and aligned enough for anything
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#define MALLOC __attribute__ ((__malloc__))
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// no side effect, may read globals
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#define PURE __attribute__ ((__pure__))
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// tell gcc what to expect: if(unlikely(err)) die(err);
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#define likely(x) __builtin_expect(!!(x),1)
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#define unlikely(x) __builtin_expect(!!(x),0)
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#define expected(x,y) __builtin_expect((x),(y))
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#else
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#define MALLOC
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#define PURE
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#define likely(x) (x)
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#define unlikely(x) (x)
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#define expected(x,y) (x)
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#endif
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#endif
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