61 lines
1.3 KiB
C++
61 lines
1.3 KiB
C++
#pragma once
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#include <cstddef>
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#include <limits>
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#include <new>
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#include "memory.h"
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namespace helos {
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class bad_alloc: public std::exception {
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public:
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bad_alloc() noexcept {}
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bad_alloc(const bad_alloc &other) noexcept {}
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bad_alloc &operator=(const bad_alloc &other) noexcept { return *this; }
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virtual const char *what() const noexcept override { return "helos::bad_alloc"; }
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};
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// kAllocator is a class wrapper for kMalloc/Free satisfying the named requirement Allocator.
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template<typename Type>
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class kAllocator {
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public:
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typedef Type value_type;
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kAllocator() = default;
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template<typename Other>
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constexpr kAllocator(const kAllocator<Other> &) {}
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Type *allocate(std::size_t n) {
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return kMalloc(n * sizeof(Type));
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}
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void deallocate(Type *p, std::size_t n) {
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kFree(p);
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}
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};
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template<class T, class U>
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bool operator==(const kAllocator<T> &, const kAllocator<U> &) {
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return true;
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}
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template<class T, class U>
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bool operator!=(const kAllocator<T> &, const kAllocator<U> &) {
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return false;
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}
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} // namespace helos
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// globally overload the new and delete operators
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// so keep this header at the top of every source file
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//
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// operators new and delete only call kMalloc/kFree, so C++ code
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// must stay after paging setup
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void *operator new(std::size_t size);
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void operator delete(void *ptr) noexcept;
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