diff options
Diffstat (limited to 'src/core/lib/transport/mdstr_hash_table.c')
-rw-r--r-- | src/core/lib/transport/mdstr_hash_table.c | 35 |
1 files changed, 26 insertions, 9 deletions
diff --git a/src/core/lib/transport/mdstr_hash_table.c b/src/core/lib/transport/mdstr_hash_table.c index 4be0536dd7..30968e91ff 100644 --- a/src/core/lib/transport/mdstr_hash_table.c +++ b/src/core/lib/transport/mdstr_hash_table.c @@ -42,6 +42,7 @@ struct grpc_mdstr_hash_table { gpr_refcount refs; size_t num_entries; + size_t size; grpc_mdstr_hash_table_entry* entries; }; @@ -50,13 +51,13 @@ struct grpc_mdstr_hash_table { static size_t grpc_mdstr_hash_table_find_index( const grpc_mdstr_hash_table* table, const grpc_mdstr* key, bool find_empty) { - for (size_t i = 0; i < table->num_entries; ++i) { - const size_t idx = (key->hash + i * i) % table->num_entries; + for (size_t i = 0; i < table->size; ++i) { + const size_t idx = (key->hash + i * i) % table->size; if (table->entries[idx].key == NULL) - return find_empty ? idx : table->num_entries; + return find_empty ? idx : table->size; if (table->entries[idx].key == key) return idx; } - return table->num_entries; // Not found. + return table->size; // Not found. } static void grpc_mdstr_hash_table_add( @@ -65,7 +66,7 @@ static void grpc_mdstr_hash_table_add( GPR_ASSERT(value != NULL); const size_t idx = grpc_mdstr_hash_table_find_index(table, key, true /* find_empty */); - GPR_ASSERT(idx != table->num_entries); // Table should never be full. + GPR_ASSERT(idx != table->size); // Table should never be full. grpc_mdstr_hash_table_entry* entry = &table->entries[idx]; entry->key = GRPC_MDSTR_REF(key); entry->value = vtable->copy_value(value); @@ -77,11 +78,12 @@ grpc_mdstr_hash_table* grpc_mdstr_hash_table_create( grpc_mdstr_hash_table* table = gpr_malloc(sizeof(*table)); memset(table, 0, sizeof(*table)); gpr_ref_init(&table->refs, 1); + table->num_entries = num_entries; // Quadratic probing gets best performance when the table is no more // than half full. - table->num_entries = num_entries * 2; + table->size = num_entries * 2; const size_t entry_size = - sizeof(grpc_mdstr_hash_table_entry) * table->num_entries; + sizeof(grpc_mdstr_hash_table_entry) * table->size; table->entries = gpr_malloc(entry_size); memset(table->entries, 0, entry_size); for (size_t i = 0; i < num_entries; ++i) { @@ -98,7 +100,7 @@ grpc_mdstr_hash_table* grpc_mdstr_hash_table_ref(grpc_mdstr_hash_table* table) { int grpc_mdstr_hash_table_unref(grpc_mdstr_hash_table* table) { if (table != NULL && gpr_unref(&table->refs)) { - for (size_t i = 0; i < table->num_entries; ++i) { + for (size_t i = 0; i < table->size; ++i) { grpc_mdstr_hash_table_entry* entry = &table->entries[i]; if (entry->key != NULL) { GRPC_MDSTR_UNREF(entry->key); @@ -112,11 +114,15 @@ int grpc_mdstr_hash_table_unref(grpc_mdstr_hash_table* table) { return 0; } +size_t grpc_mdstr_hash_table_num_entries(const grpc_mdstr_hash_table* table) { + return table->num_entries; +} + void* grpc_mdstr_hash_table_get(const grpc_mdstr_hash_table* table, const grpc_mdstr* key) { const size_t idx = grpc_mdstr_hash_table_find_index(table, key, false /* find_empty */); - if (idx == table->num_entries) return NULL; // Not found. + if (idx == table->size) return NULL; // Not found. return table->entries[idx].value; } @@ -140,3 +146,14 @@ int grpc_mdstr_hash_table_cmp(const grpc_mdstr_hash_table* table1, } return 0; } + +void grpc_mdstr_hash_table_iterate( + const grpc_mdstr_hash_table* table, + void (*func)(const grpc_mdstr_hash_table_entry* entry, void* user_data), + void* user_data) { + for (size_t i = 0; i < table->size; ++i) { + if (table->entries[i].key != NULL) { + func(&table->entries[i], user_data); + } + } +} |