34 lines
1.1 KiB
C++
34 lines
1.1 KiB
C++
#pragma once
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#include <memory>
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#include <vector>
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#define ROUNDDOWN(val, align) ((val) & ~(align - 1))
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#define ROUNDUP(val, align) ROUNDDOWN(((val) + (align - 1)), align)
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template<class T, class... Args>
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std::unique_ptr<T> make_unique_nothrow(Args &&...args) noexcept(noexcept(T(std::forward<Args>(args)...))) {
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return std::unique_ptr<T>(new (std::nothrow) T(std::forward<Args>(args)...));
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}
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template<typename T>
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inline typename std::unique_ptr<T> make_unique_nothrow(size_t num) noexcept {
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return std::unique_ptr<T>(new (std::nothrow) std::remove_extent_t<T>[num]());
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}
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template<class T, class... Args>
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std::shared_ptr<T> make_shared_nothrow(Args &&...args) noexcept(noexcept(T(std::forward<Args>(args)...))) {
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return std::shared_ptr<T>(new (std::nothrow) T(std::forward<Args>(args)...));
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}
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template<typename T, class Allocator, class Predicate>
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bool remove_first_if(std::vector<T, Allocator> &list, Predicate pred) {
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auto it = list.begin();
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while (it != list.end()) {
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if (pred(*it)) {
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list.erase(it);
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return true;
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}
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it++;
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}
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return false;
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} |