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yap-6.3/MYDDAS/myddas_initialization.c
2011-03-07 16:02:55 +00:00

113 lines
2.7 KiB
C

#if defined MYDDAS_ODBC || defined MYDDAS_MYSQL
#include "Yap.h"
#include <stdio.h>
#include <stdlib.h>
#include "myddas.h"
#include "myddas_structs.h"
#ifdef MYDDAS_STATS
#include "myddas_statistics.h"
#endif
MYDDAS_GLOBAL
myddas_init_initialize_myddas(void){
MYDDAS_GLOBAL global = NULL;
/* We cannot call MYDDAS_MALLOC were because the global
register isn't yet initialized */
global = (MYDDAS_GLOBAL) malloc (sizeof(struct myddas_global));
#ifdef DEBUG
printf ("MALLOC %p %s %d\n",global,__FILE__,__LINE__);
#endif
global->myddas_top_connections = NULL;
#ifdef MYDDAS_TOP_LEVEL
global->myddas_top_level_connection = NULL;
#endif
#ifdef MYDDAS_STATS
global->myddas_statistics = (MYDDAS_GLOBAL_STATS) malloc (sizeof(struct myddas_global_stats));
#ifdef DEBUG
printf ("MALLOC %p %s %d\n",global->myddas_statistics,__FILE__,__LINE__);
#endif
global->myddas_statistics->stats = NULL;
#endif
#ifdef DEBUG
/* We first malloc for this struct and the stats struct */
#ifdef MYDDAS_STATS
global->malloc_called = 2;
global->memory_allocated = sizeof(struct myddas_global) + sizeof(struct myddas_global_stats);
#else
global->malloc_called = 1;
global->memory_allocated = sizeof(struct myddas_global);
#endif /* MYDDAS_STATS */
global->free_called = 0;
global->memory_freed = 0;
#endif
return global;
}
/* Inserts the new node on the front of the list */
MYDDAS_UTIL_CONNECTION
myddas_init_initialize_connection(void *conn,void *enviromment,
MYDDAS_UTIL_CONNECTION next){
CACHE_REGS
MYDDAS_UTIL_CONNECTION new = NULL;
MYDDAS_MALLOC(new,struct myddas_list_connection);
if (new == NULL)
{
return NULL;
}
new->predicates=NULL;
new->connection=conn;
new->odbc_enviromment=enviromment;
/* It saves n queries, doing at once n+1 queries */
new->total_number_queries=0; //Default
new->actual_number_queries=0;
new->queries = NULL;
/* List integrity */
new->next=next;
new->previous=NULL;
/* If there's already at least one node
on the list */
if (next != NULL)
next->previous=new;
#ifdef MYDDAS_STATS
new->stats = NULL;
new->stats = myddas_stats_initialize_connection_stats();
#endif
return new;
}
MYDDAS_UTIL_PREDICATE
myddas_init_initialize_predicate(char *pred_name, int pred_arity,
char *pred_module, MYDDAS_UTIL_PREDICATE next){
CACHE_REGS
MYDDAS_UTIL_PREDICATE new = NULL;
MYDDAS_MALLOC(new,struct myddas_list_preds);
if (new == NULL)
{
return NULL;
}
new->pred_name=pred_name;
new->pred_arity=pred_arity;
new->pred_module=pred_module;
/* List integrity */
new->next=next;
new->previous=NULL;
/* If there's already at least one node
on the list */
if (next != NULL)
next->previous=new;
return new;
}
#endif