eldritch horrors
2e5780ebc8
if we define a TraceableAllocator at all times and use that in places that want maybe-traceable allocation we can simplify things a lot. we also unconditionally allocate cache root pointers for Value and Env-1 caches, even though we don't need them without gc (they're so cheap). defaulting to `std::allocator` without gc recovers previous behavior. Change-Id: I236da8c3b0669b40cdfe355ec3ec4e764d096074
32 lines
727 B
C++
32 lines
727 B
C++
#pragma once
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///@file
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#include "gc-alloc.hh"
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#include <boost/container/small_vector.hpp>
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namespace nix {
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struct Value;
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/**
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* A GC compatible vector that may used a reserved portion of `nItems` on the stack instead of allocating on the heap.
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*/
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template <typename T, size_t nItems>
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using SmallVector = boost::container::small_vector<T, nItems, TraceableAllocator<T>>;
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/**
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* A vector of value pointers. See `SmallVector`.
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*/
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template <size_t nItems>
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using SmallValueVector = SmallVector<Value *, nItems>;
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/**
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* A vector of values that must not be referenced after the vector is destroyed.
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*
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* See also `SmallValueVector`.
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*/
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template <size_t nItems>
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using SmallTemporaryValueVector = SmallVector<Value, nItems>;
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}
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