1 #include "jemalloc/internal/jemalloc_preamble.h" 2 #include "jemalloc/internal/jemalloc_internal_includes.h" 3 4 #include "jemalloc/internal/assert.h" 5 #include "jemalloc/internal/bin.h" 6 #include "jemalloc/internal/sc.h" 7 #include "jemalloc/internal/witness.h" 8 9 bool 10 bin_update_shard_size(unsigned bin_shard_sizes[SC_NBINS], size_t start_size, 11 size_t end_size, size_t nshards) { 12 if (nshards > BIN_SHARDS_MAX || nshards == 0) { 13 return true; 14 } 15 16 if (start_size > SC_SMALL_MAXCLASS) { 17 return false; 18 } 19 if (end_size > SC_SMALL_MAXCLASS) { 20 end_size = SC_SMALL_MAXCLASS; 21 } 22 23 /* Compute the index since this may happen before sz init. */ 24 szind_t ind1 = sz_size2index_compute(start_size); 25 szind_t ind2 = sz_size2index_compute(end_size); 26 for (unsigned i = ind1; i <= ind2; i++) { 27 bin_shard_sizes[i] = (unsigned)nshards; 28 } 29 30 return false; 31 } 32 33 void 34 bin_shard_sizes_boot(unsigned bin_shard_sizes[SC_NBINS]) { 35 /* Load the default number of shards. */ 36 for (unsigned i = 0; i < SC_NBINS; i++) { 37 bin_shard_sizes[i] = N_BIN_SHARDS_DEFAULT; 38 } 39 } 40 41 bool 42 bin_init(bin_t *bin) { 43 if (malloc_mutex_init(&bin->lock, "bin", WITNESS_RANK_BIN, 44 malloc_mutex_rank_exclusive)) { 45 return true; 46 } 47 bin->slabcur = NULL; 48 edata_heap_new(&bin->slabs_nonfull); 49 edata_list_active_init(&bin->slabs_full); 50 if (config_stats) { 51 memset(&bin->stats, 0, sizeof(bin_stats_t)); 52 } 53 return false; 54 } 55 56 void 57 bin_prefork(tsdn_t *tsdn, bin_t *bin) { 58 malloc_mutex_prefork(tsdn, &bin->lock); 59 } 60 61 void 62 bin_postfork_parent(tsdn_t *tsdn, bin_t *bin) { 63 malloc_mutex_postfork_parent(tsdn, &bin->lock); 64 } 65 66 void 67 bin_postfork_child(tsdn_t *tsdn, bin_t *bin) { 68 malloc_mutex_postfork_child(tsdn, &bin->lock); 69 } 70