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1d1dc31a06
symbols. Use it for all definitions of non-static variables and functions. lexyy.c, make_flex.sh: Declare yylex as UNIV_INTERN, not static. It is referenced from pars0grm.c. Actually, according to nm .libs/ha_innodb.so|grep -w '[ABCE-TVXYZ]' the following symbols are still global: * The vtable for class ha_innodb * pars0grm.c: The function yyparse() and the variables yychar, yylval, yynerrs The required changes to the Bison-generated file pars0grm.c will be addressed in a separate commit, which will add a script similar to make_flex.sh. The class ha_innodb is renamed from class ha_innobase by a #define. Thus, there will be no clash with the builtin InnoDB. However, there will be some overhead for invoking virtual methods of class ha_innodb. Ideas for making the vtable hidden are welcome. -fvisibility=hidden is not available in GCC 3.
148 lines
3.2 KiB
C
148 lines
3.2 KiB
C
/******************************************************
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The simple hash table utility
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(c) 1997 Innobase Oy
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Created 5/20/1997 Heikki Tuuri
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*******************************************************/
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#include "hash0hash.h"
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#ifdef UNIV_NONINL
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#include "hash0hash.ic"
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#endif
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#include "mem0mem.h"
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/****************************************************************
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Reserves the mutex for a fold value in a hash table. */
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UNIV_INTERN
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void
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hash_mutex_enter(
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/*=============*/
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hash_table_t* table, /* in: hash table */
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ulint fold) /* in: fold */
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{
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mutex_enter(hash_get_mutex(table, fold));
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}
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/****************************************************************
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Releases the mutex for a fold value in a hash table. */
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UNIV_INTERN
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void
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hash_mutex_exit(
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/*============*/
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hash_table_t* table, /* in: hash table */
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ulint fold) /* in: fold */
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{
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mutex_exit(hash_get_mutex(table, fold));
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}
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/****************************************************************
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Reserves all the mutexes of a hash table, in an ascending order. */
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UNIV_INTERN
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void
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hash_mutex_enter_all(
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/*=================*/
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hash_table_t* table) /* in: hash table */
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{
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ulint i;
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for (i = 0; i < table->n_mutexes; i++) {
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mutex_enter(table->mutexes + i);
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}
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}
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/****************************************************************
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Releases all the mutexes of a hash table. */
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UNIV_INTERN
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void
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hash_mutex_exit_all(
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/*================*/
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hash_table_t* table) /* in: hash table */
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{
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ulint i;
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for (i = 0; i < table->n_mutexes; i++) {
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mutex_exit(table->mutexes + i);
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}
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}
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/*****************************************************************
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Creates a hash table with >= n array cells. The actual number of cells is
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chosen to be a prime number slightly bigger than n. */
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UNIV_INTERN
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hash_table_t*
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hash_create(
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/*========*/
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/* out, own: created table */
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ulint n) /* in: number of array cells */
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{
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hash_cell_t* array;
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ulint prime;
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hash_table_t* table;
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prime = ut_find_prime(n);
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table = mem_alloc(sizeof(hash_table_t));
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array = ut_malloc(sizeof(hash_cell_t) * prime);
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#ifdef UNIV_DEBUG
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table->adaptive = FALSE;
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#endif /* UNIV_DEBUG */
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table->array = array;
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table->n_cells = prime;
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table->n_mutexes = 0;
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table->mutexes = NULL;
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table->heaps = NULL;
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table->heap = NULL;
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table->magic_n = HASH_TABLE_MAGIC_N;
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/* Initialize the cell array */
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hash_table_clear(table);
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return(table);
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}
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/*****************************************************************
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Frees a hash table. */
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UNIV_INTERN
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void
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hash_table_free(
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/*============*/
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hash_table_t* table) /* in, own: hash table */
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{
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ut_a(table->mutexes == NULL);
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ut_free(table->array);
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mem_free(table);
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}
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/*****************************************************************
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Creates a mutex array to protect a hash table. */
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UNIV_INTERN
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void
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hash_create_mutexes_func(
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/*=====================*/
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hash_table_t* table, /* in: hash table */
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#ifdef UNIV_SYNC_DEBUG
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ulint sync_level, /* in: latching order level of the
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mutexes: used in the debug version */
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#endif /* UNIV_SYNC_DEBUG */
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ulint n_mutexes) /* in: number of mutexes, must be a
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power of 2 */
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{
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ulint i;
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ut_a(n_mutexes > 0 && ut_is_2pow(n_mutexes));
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table->mutexes = mem_alloc(n_mutexes * sizeof(mutex_t));
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for (i = 0; i < n_mutexes; i++) {
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mutex_create(table->mutexes + i, sync_level);
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}
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table->n_mutexes = n_mutexes;
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}
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