0845cdf944
Boehm guarantees that memory returned by GC_malloc() is zeroed, so take advantage of that.
65 lines
1.3 KiB
C++
65 lines
1.3 KiB
C++
#include "attr-set.hh"
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#include "eval.hh"
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#include <algorithm>
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namespace nix {
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/* Note: Various places expect the allocated memory to be zeroed. */
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static void * allocBytes(size_t n)
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{
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void * p;
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#if HAVE_BOEHMGC
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p = GC_malloc(n);
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#else
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p = calloc(n, 1);
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#endif
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if (!p) throw std::bad_alloc();
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return p;
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}
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/* Allocate a new array of attributes for an attribute set with a specific
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capacity. The space is implicitly reserved after the Bindings
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structure. */
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Bindings * EvalState::allocBindings(Bindings::size_t capacity)
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{
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return new (allocBytes(sizeof(Bindings) + sizeof(Attr) * capacity)) Bindings(capacity);
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}
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void EvalState::mkAttrs(Value & v, unsigned int capacity)
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{
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if (capacity == 0) {
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v = vEmptySet;
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return;
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}
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clearValue(v);
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v.type = tAttrs;
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v.attrs = allocBindings(capacity);
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nrAttrsets++;
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nrAttrsInAttrsets += capacity;
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}
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/* Create a new attribute named 'name' on an existing attribute set stored
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in 'vAttrs' and return the newly allocated Value which is associated with
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this attribute. */
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Value * EvalState::allocAttr(Value & vAttrs, const Symbol & name)
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{
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Value * v = allocValue();
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vAttrs.attrs->push_back(Attr(name, v));
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return v;
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}
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void Bindings::sort()
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{
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std::sort(begin(), end());
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}
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}
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