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29 #include "pt_block_cache.h"
35 struct pt_block_cache *pt_bcache_alloc(uint64_t nentries)
37 struct pt_block_cache *bcache;
40 if (!nentries || (UINT32_MAX < nentries))
43 size = sizeof(*bcache) + (nentries * sizeof(struct pt_bcache_entry));
47 bcache = malloc((size_t) size);
51 memset(bcache, 0, (size_t) size);
52 bcache->nentries = (uint32_t) nentries;
57 void pt_bcache_free(struct pt_block_cache *bcache)
62 int pt_bcache_add(struct pt_block_cache *bcache, uint64_t index,
63 struct pt_bcache_entry bce)
68 if (bcache->nentries <= index)
71 /* We rely on guaranteed atomic operations as specified in section 8.1.1
72 * in Volume 3A of the Intel(R) Software Developer's Manual at
73 * http://www.intel.com/sdm.
75 bcache->entry[(uint32_t) index] = bce;
80 int pt_bcache_lookup(struct pt_bcache_entry *bce,
81 const struct pt_block_cache *bcache, uint64_t index)
86 if (bcache->nentries <= index)
89 /* We rely on guaranteed atomic operations as specified in section 8.1.1
90 * in Volume 3A of the Intel(R) Software Developer's Manual at
91 * http://www.intel.com/sdm.
93 *bce = bcache->entry[(uint32_t) index];