Handle mmap failures for redblack tree cache
The redblack tree cache is totally optional, so if we can't allocate room for the cache, then just pretend as if the cache is full if mmap fails
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shape.c
8
shape.c
@ -1233,6 +1233,14 @@ Init_default_shapes(void)
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rb_shape_tree_ptr->shape_cache = (redblack_node_t *)mmap(NULL, rb_size_mul_or_raise(REDBLACK_CACHE_SIZE, sizeof(redblack_node_t), rb_eRuntimeError),
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PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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rb_shape_tree_ptr->cache_size = 0;
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// If mmap fails, then give up on the redblack tree cache.
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// We set the cache size such that the redblack node allocators think
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// the cache is full.
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if (GET_SHAPE_TREE()->shape_cache == MAP_FAILED) {
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GET_SHAPE_TREE()->shape_cache = 0;
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GET_SHAPE_TREE()->cache_size = REDBLACK_CACHE_SIZE;
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}
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#endif
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// Shapes by size pool
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