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polybar/include/utils/memory.hpp

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#pragma once
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#include <cstdlib>
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#include "common.hpp"
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POLYBAR_NS
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template <typename T>
using malloc_ptr_t = shared_ptr<T>;
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namespace memory_util {
/**
* Create a shared pointer using malloc/free
*
* Generates a noexcept-type warning because the mangled name for
* malloc_ptr_t will change in C++17. This doesn't affect use because we have
* no public ABI, so we ignore it here.
* See also this SO answer: https://stackoverflow.com/a/46857525/5363071
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*/
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wnoexcept-type"
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template <typename T, size_t Size = sizeof(T), typename Deleter = decltype(std::free)>
inline malloc_ptr_t<T> make_malloc_ptr(Deleter deleter = std::free) {
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return malloc_ptr_t<T>(static_cast<T*>(calloc(1, Size)), deleter);
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}
#pragma GCC diagnostic pop
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/**
* Get the number of elements in T
*/
template <typename T>
inline auto countof(T& p) {
return sizeof(p) / sizeof(p[0]);
}
} // namespace memory_util
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POLYBAR_NS_END