mirror of
https://github.com/SerenityOS/serenity
synced 2024-07-22 18:46:18 +00:00
94ca55cefd
As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
323 lines
7.6 KiB
C++
323 lines
7.6 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 KERNEL
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# include <Kernel/StdLib.h>
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#else
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# include <stdlib.h>
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# include <string.h>
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#endif
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#define UNUSED_PARAM(x) (void)x
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#include <AK/Types.h>
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#if defined(__serenity__) && !defined(KERNEL)
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extern "C" void* mmx_memcpy(void* to, const void* from, size_t);
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#endif
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[[gnu::always_inline]] inline void fast_u32_copy(u32* dest, const u32* src, size_t count)
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{
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#if defined(__serenity__) && !defined(KERNEL)
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if (count >= 256) {
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mmx_memcpy(dest, src, count * sizeof(count));
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return;
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}
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#endif
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asm volatile(
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"rep movsl\n"
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: "=S"(src), "=D"(dest), "=c"(count)
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: "S"(src), "D"(dest), "c"(count)
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: "memory");
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}
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[[gnu::always_inline]] inline void fast_u32_fill(u32* dest, u32 value, size_t count)
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{
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asm volatile(
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"rep stosl\n"
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: "=D"(dest), "=c"(count)
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: "D"(dest), "c"(count), "a"(value)
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: "memory");
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}
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inline constexpr u32 round_up_to_power_of_two(u32 value, u32 power_of_two)
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{
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return ((value - 1) & ~(power_of_two - 1)) + power_of_two;
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}
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namespace AK {
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template<typename T>
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inline constexpr T min(const T& a, const T& b)
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{
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return a < b ? a : b;
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}
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template<typename T>
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inline constexpr T max(const T& a, const T& b)
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{
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return a < b ? b : a;
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}
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template<typename T, typename U>
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inline constexpr T ceil_div(T a, U b)
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{
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static_assert(sizeof(T) == sizeof(U));
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T result = a / b;
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if ((a % b) != 0)
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++result;
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return result;
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}
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#ifdef __clang__
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# pragma clang diagnostic push
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# pragma clang diagnostic ignored "-Wconsumed"
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#endif
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template<typename T>
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T&& move(T& arg)
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{
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return static_cast<T&&>(arg);
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}
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#ifdef __clang__
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# pragma clang diagnostic pop
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#endif
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template<typename T>
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struct Identity {
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typedef T Type;
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};
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template<class T>
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constexpr T&& forward(typename Identity<T>::Type& param)
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{
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return static_cast<T&&>(param);
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}
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template<typename T, typename U>
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T exchange(T& a, U&& b)
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{
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T tmp = move(a);
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a = move(b);
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return tmp;
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}
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template<typename T, typename U>
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void swap(T& a, U& b)
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{
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U tmp = move((U&)a);
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a = (T &&) move(b);
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b = move(tmp);
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}
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template<bool B, class T = void>
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struct EnableIf {
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};
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template<class T>
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struct EnableIf<true, T> {
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typedef T Type;
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};
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template<class T>
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struct RemoveConst {
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typedef T Type;
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};
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template<class T>
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struct RemoveConst<const T> {
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typedef T Type;
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};
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template<class T>
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struct RemoveVolatile {
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typedef T Type;
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};
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template<class T>
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struct RemoveVolatile<volatile T> {
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typedef T Type;
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};
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template<class T>
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struct RemoveCV {
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typedef typename RemoveVolatile<typename RemoveConst<T>::Type>::Type Type;
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};
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template<class T, T v>
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struct IntegralConstant {
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static constexpr T value = v;
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typedef T ValueType;
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typedef IntegralConstant Type;
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constexpr operator ValueType() const { return value; }
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constexpr ValueType operator()() const { return value; }
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};
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typedef IntegralConstant<bool, false> FalseType;
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typedef IntegralConstant<bool, true> TrueType;
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template<class T>
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struct __IsPointerHelper : FalseType {
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};
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template<class T>
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struct __IsPointerHelper<T*> : TrueType {
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};
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template<class T>
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struct IsPointer : __IsPointerHelper<typename RemoveCV<T>::Type> {
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};
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template<class>
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struct IsFunction : FalseType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args...)> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args..., ...)> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args...) const> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args..., ...) const> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args...) volatile> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args..., ...) volatile> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args...) const volatile> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args..., ...) const volatile> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args...)&> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args..., ...)&> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args...) const&> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args..., ...) const&> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args...) volatile&> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args..., ...) volatile&> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args...) const volatile&> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args..., ...) const volatile&> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args...) &&> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args..., ...) &&> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args...) const&&> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args..., ...) const&&> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args...) volatile&&> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args..., ...) volatile&&> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args...) const volatile&&> : TrueType {
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};
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template<class Ret, class... Args>
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struct IsFunction<Ret(Args..., ...) const volatile&&> : TrueType {
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};
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template<class T>
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struct IsRvalueReference : FalseType {
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};
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template<class T>
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struct IsRvalueReference<T&&> : TrueType {
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};
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template<class T>
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struct RemovePointer {
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typedef T Type;
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};
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template<class T>
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struct RemovePointer<T*> {
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typedef T Type;
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};
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template<class T>
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struct RemovePointer<T* const> {
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typedef T Type;
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};
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template<class T>
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struct RemovePointer<T* volatile> {
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typedef T Type;
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};
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template<class T>
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struct RemovePointer<T* const volatile> {
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typedef T Type;
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};
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template<typename T, typename U>
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struct IsSame {
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enum {
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value = 0
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};
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};
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template<typename T>
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struct IsSame<T, T> {
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enum {
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value = 1
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};
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};
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}
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using AK::ceil_div;
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using AK::exchange;
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using AK::forward;
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using AK::IsSame;
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using AK::max;
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using AK::min;
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using AK::move;
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using AK::RemoveConst;
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using AK::swap;
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