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https://github.com/SerenityOS/serenity
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19be842b5b
Clang keeps whining that NonnullFooPtrs are in "unknown" state and I'm not sure how to resolve that right now. Disable the checking until we can figure it out.
102 lines
3.4 KiB
C++
102 lines
3.4 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#ifdef __i386__
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# define AK_ARCH_I386 1
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#endif
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#ifdef __x86_64__
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# define AK_ARCH_X86_64 1
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#endif
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#define ARCH(arch) (defined(AK_ARCH_##arch) && AK_ARCH_##arch)
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// FIXME: Re-enable this when we can figure out why Clang gets confused about "unknown"
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#if 0
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# define CONSUMABLE(initial_state) __attribute__((consumable(initial_state)))
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# define CALLABLE_WHEN(...) __attribute__((callable_when(__VA_ARGS__)))
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# define SET_TYPESTATE(state) __attribute__((set_typestate(state)))
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# define RETURN_TYPESTATE(state) __attribute__((return_typestate(state)))
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#else
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# define CONSUMABLE(initial_state)
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# define CALLABLE_WHEN(...)
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# define SET_TYPESTATE(state)
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# define RETURN_TYPESTATE(state)
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#endif
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#ifndef __serenity__
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# define PAGE_SIZE sysconf(_SC_PAGESIZE)
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# include <errno.h>
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# include <fcntl.h>
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# include <stdlib.h>
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# include <string.h>
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inline int open_with_path_length(const char* path, size_t path_length, int options, mode_t mode)
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{
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auto* tmp = (char*)malloc(path_length + 1);
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memcpy(tmp, path, path_length);
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tmp[path_length] = '\0';
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int fd = open(tmp, options, mode);
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int saved_errno = errno;
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free(tmp);
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errno = saved_errno;
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return fd;
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}
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#endif
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template<typename T>
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[[gnu::always_inline]] inline T convert_between_host_and_network(T value)
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{
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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if constexpr (sizeof(T) == 8)
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return __builtin_bswap64(value);
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if constexpr (sizeof(T) == 4)
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return __builtin_bswap32(value);
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if constexpr (sizeof(T) == 2)
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return __builtin_bswap16(value);
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if constexpr (sizeof(T) == 1)
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return value;
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#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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return value;
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#endif
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}
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[[gnu::always_inline]] inline int count_trailing_zeroes_32(unsigned int val)
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{
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#if defined(__GNUC__) || defined(__clang__)
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return __builtin_ctz(val);
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#else
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for (u8 i = 0; i < 32; ++i) {
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if ((val >> i) & 1) {
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return i;
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}
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}
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return 0;
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#endif
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}
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