54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
#ifndef JEMALLOC_INTERNAL_RTREE_STRUCTS_H
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#define JEMALLOC_INTERNAL_RTREE_STRUCTS_H
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#include "jemalloc/internal/atomic.h"
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#include "jemalloc/internal/mutex.h"
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struct rtree_node_elm_s {
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atomic_p_t child; /* (rtree_{node,leaf}_elm_t *) */
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};
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struct rtree_leaf_elm_s {
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#ifdef RTREE_LEAF_COMPACT
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/*
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* Single pointer-width field containing all three leaf element fields.
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* For example, on a 64-bit x64 system with 48 significant virtual
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* memory address bits, the index, extent, and slab fields are packed as
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* such:
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*
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* x: index
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* e: extent
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* b: slab
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*
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* 00000000 xxxxxxxx eeeeeeee [...] eeeeeeee eeee000b
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*/
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atomic_p_t le_bits;
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#else
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atomic_p_t le_extent; /* (extent_t *) */
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atomic_u_t le_szind; /* (szind_t) */
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atomic_b_t le_slab; /* (bool) */
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#endif
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};
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struct rtree_level_s {
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/* Number of key bits distinguished by this level. */
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unsigned bits;
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/*
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* Cumulative number of key bits distinguished by traversing to
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* corresponding tree level.
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*/
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unsigned cumbits;
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};
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struct rtree_s {
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malloc_mutex_t init_lock;
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/* Number of elements based on rtree_levels[0].bits. */
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#if RTREE_HEIGHT > 1
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rtree_node_elm_t root[1U << (RTREE_NSB/RTREE_HEIGHT)];
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#else
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rtree_leaf_elm_t root[1U << (RTREE_NSB/RTREE_HEIGHT)];
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#endif
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};
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#endif /* JEMALLOC_INTERNAL_RTREE_STRUCTS_H */
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