mirror of https://github.com/yshui/picom.git
137 lines
3.0 KiB
C
137 lines
3.0 KiB
C
// SPDX-License-Identifier: MPL-2.0
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// Copyright (c) 2018 Yuxuan Shui <yshuiv7@gmail.com>
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#pragma once
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#ifdef HAS_STDC_PREDEF_H
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#include <stdc-predef.h>
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#endif
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// clang-format off
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#if __STDC_VERSION__ <= 201710L
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// Polyfill for C23's `auto` and `typeof`
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# define auto __auto_type
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# define typeof __typeof__
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#endif
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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 likely_if(x) if (likely(x))
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#define unlikely_if(x) if (unlikely(x))
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#ifndef __has_attribute
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# if __GNUC__ >= 4
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# define __has_attribute(x) 1
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# else
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# define __has_attribute(x) 0
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# endif
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#endif
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#if __has_attribute(const)
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# define attr_const __attribute__((const))
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#else
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# define attr_const
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#endif
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#if __has_attribute(format)
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# define attr_printf(a, b) __attribute__((format(printf, a, b)))
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#else
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# define attr_printf(a, b)
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#endif
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#if __has_attribute(pure)
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# define attr_pure __attribute__((pure))
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#else
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# define attr_pure
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#endif
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#if __has_attribute(unused)
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# define attr_unused __attribute__((unused))
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#else
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# define attr_unused
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#endif
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#if __has_attribute(warn_unused_result)
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# define attr_warn_unused_result __attribute__((warn_unused_result))
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#else
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# define attr_warn_unused_result
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#endif
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// An alias for convenience
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#define must_use attr_warn_unused_result
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#if __has_attribute(nonnull)
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# define attr_nonnull(...) __attribute__((nonnull(__VA_ARGS__)))
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# define attr_nonnull_all __attribute__((nonnull))
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#else
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# define attr_nonnull(...)
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# define attr_nonnull_all
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#endif
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#if __has_attribute(returns_nonnull)
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# define attr_ret_nonnull __attribute__((returns_nonnull))
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#else
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# define attr_ret_nonnull
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#endif
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#if __has_attribute(deprecated)
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# define attr_deprecated __attribute__((deprecated))
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#else
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# define attr_deprecated
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#endif
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#if __has_attribute(malloc)
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# define attr_malloc __attribute__((malloc))
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#else
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# define attr_malloc
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#endif
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#if __has_attribute(fallthrough)
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# define fallthrough() __attribute__((fallthrough))
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#else
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# define fallthrough()
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#endif
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#if __has_attribute(cleanup)
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# define cleanup(func) __attribute__((cleanup(func)))
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#else
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# error "Compiler is missing cleanup attribute"
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#endif
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#if __STDC_VERSION__ >= 201112L
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# define attr_noret _Noreturn
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#else
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# if __has_attribute(noreturn)
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# define attr_noret __attribute__((noreturn))
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# else
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# define attr_noret
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# endif
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#endif
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#ifndef unreachable
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# if defined(__GNUC__) || defined(__clang__)
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# define unreachable() assert(false); __builtin_unreachable()
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# else
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# define unreachable() assert(false); do {} while(0)
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# endif
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#endif
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#ifndef __has_include
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# define __has_include(x) 0
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#endif
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#if !defined(__STDC_NO_THREADS__) && __has_include(<threads.h>)
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# include <threads.h>
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#elif __STDC_VERSION__ >= 201112L
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# define thread_local _Thread_local
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#elif defined(__GNUC__) || defined(__clang__)
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# define thread_local __thread
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#else
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# define thread_local _Pragma("GCC error \"No thread local storage support\"") __error__
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#endif
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// clang-format on
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typedef unsigned long ulong;
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typedef unsigned int uint;
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static inline int attr_const popcntul(unsigned long a) {
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return __builtin_popcountl(a);
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}
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