113 lines
3.1 KiB
C++
113 lines
3.1 KiB
C++
// -*- mode: cpp; mode: fold -*-
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// SPDX-License-Identifier: GPL-2.0+
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// Description /*{{{*/
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/* ######################################################################
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Macros Header - Various useful macro definitions
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This file had this historic note, but now includes further changes
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under the GPL-2.0+:
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This source is placed in the Public Domain, do with it what you will
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It was originally written by Brian C. White.
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##################################################################### */
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/*}}}*/
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// Private header
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#ifndef MACROS_H
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#define MACROS_H
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#ifdef __GNUC__
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#define APT_GCC_VERSION (__GNUC__ << 8 | __GNUC_MINOR__)
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#else
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#define APT_GCC_VERSION 0
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#endif
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#ifdef APT_COMPILING_APT
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/* likely() and unlikely() can be used to mark boolean expressions
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as (not) likely true which will help the compiler to optimise */
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#if APT_GCC_VERSION >= 0x0300
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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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#else
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#define likely(x) (x)
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#define unlikely(x) (x)
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#endif
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#endif
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#if APT_GCC_VERSION >= 0x0300
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// __attribute__((const)) is too dangerous for us, we end up using it wrongly
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#define APT_PURE __attribute__((pure))
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#define APT_PRINTF(n) __attribute__((format(printf, n, n + 1)))
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#define APT_WEAK __attribute__((weak));
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#else
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#define APT_PURE
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#define APT_PRINTF(n)
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#define APT_WEAK
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#endif
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#if APT_GCC_VERSION > 0x0302
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#define APT_NONNULL(...) __attribute__((nonnull(__VA_ARGS__)))
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#else
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#define APT_NONNULL(...)
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#endif
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#if APT_GCC_VERSION >= 0x0400
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#define APT_SENTINEL __attribute__((sentinel))
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#define APT_PUBLIC __attribute__ ((visibility ("default")))
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#define APT_HIDDEN __attribute__ ((visibility ("hidden")))
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#else
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#define APT_SENTINEL
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#define APT_PUBLIC
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#define APT_HIDDEN
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#endif
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// cold functions are unlikely() to be called
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#if APT_GCC_VERSION >= 0x0403
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#define APT_COLD __attribute__ ((__cold__))
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#define APT_HOT __attribute__ ((__hot__))
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#else
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#define APT_COLD
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#define APT_HOT
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#endif
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#if __GNUC__ >= 4
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#define APT_IGNORE_DEPRECATED_PUSH \
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_Pragma("GCC diagnostic push") \
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_Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
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#define APT_IGNORE_DEPRECATED_POP \
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_Pragma("GCC diagnostic pop")
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#else
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#define APT_IGNORE_DEPRECATED_PUSH
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#define APT_IGNORE_DEPRECATED_POP
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#endif
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// These lines are extracted by the makefiles and the buildsystem
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// Increasing MAJOR or MINOR results in the need of recompiling all
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// reverse-dependencies of libapt-pkg against the new SONAME.
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// Non-ABI-Breaks should only increase RELEASE number.
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// See also buildlib/libversion.mak
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#define APT_PKG_MAJOR 7
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#define APT_PKG_MINOR 0
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#define APT_PKG_RELEASE 0
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#define APT_PKG_ABI ((APT_PKG_MAJOR * 100) + APT_PKG_MINOR)
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/* Should be a multiple of the common page size (4096) */
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static constexpr unsigned long long APT_BUFFER_SIZE = 64 * 1024;
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template <class F>
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struct AptScopeWrapper {
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F func;
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~AptScopeWrapper() { func(); }
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};
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template <class F>
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AptScopeWrapper(F) -> AptScopeWrapper<F>;
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#define APT_PASTE2(a, b) a##b
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#define APT_PASTE(a, b) APT_PASTE2(a, b)
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#define DEFER(lambda) AptScopeWrapper APT_PASTE(defer, __LINE__){lambda};
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#ifndef APT_COMPILING_APT
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#endif
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#endif
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