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957a081892
The C++ interface is intentionally minimal: it provides only a couple of niceties in order to largely stay out of the way. It is mostly used to provide: * RAII for opaque resources * Safe up and down casting for nodes * string_view for various resources * Iteration over resource lists Note that if consumers want to use it, they must be on C++17 at minimum. https://github.com/ruby/prism/commit/57b8dbe0e9
43 lines
806 B
C++
43 lines
806 B
C++
/**
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* @file arena.hpp
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*
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* Ownership of arenas from C++.
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*/
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#ifndef PRISM_ARENA_HPP
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#define PRISM_ARENA_HPP
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#include "prism/compiler/cplusplus.hpp"
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#include "prism/arena.h"
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#include <memory>
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namespace prism {
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/** Frees an arena with pm_arena_free. */
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struct arena_deleter {
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/**
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* Frees the given arena.
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*
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* @param arena The arena to free.
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*/
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void operator()(pm_arena_t *arena) const noexcept { pm_arena_free(arena); }
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};
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/** An owned arena. */
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using unique_arena = std::unique_ptr<pm_arena_t, arena_deleter>;
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/**
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* Allocate a new arena. Allocation failure aborts, so this never throws.
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*
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* @return A unique_arena managing the newly allocated arena.
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*/
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[[nodiscard]] inline unique_arena
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make_arena() noexcept {
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return unique_arena(pm_arena_new());
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}
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}
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#endif
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