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/* $PostgreSQL: pgsql/src/interfaces/ecpg/ecpglib/memory.c,v 1.12 2007/11/15 21:14:45 momjian Exp $ */
#define POSTGRES_ECPG_INTERNAL
#include "postgres_fe.h"
#include "ecpg-pthread-win32.h"
#include "ecpgtype.h"
#include "ecpglib.h"
#include "ecpgerrno.h"
#include "extern.h"
void
ecpg_free(void *ptr)
{
free(ptr);
}
char *
ecpg_alloc(long size, int lineno)
{
char *new = (char *) calloc(1L, size);
if (!new)
{
ecpg_raise(lineno, ECPG_OUT_OF_MEMORY, ECPG_SQLSTATE_ECPG_OUT_OF_MEMORY, NULL);
return NULL;
}
return (new);
}
char *
ecpg_realloc(void *ptr, long size, int lineno)
{
char *new = (char *) realloc(ptr, size);
if (!new)
{
ecpg_raise(lineno, ECPG_OUT_OF_MEMORY, ECPG_SQLSTATE_ECPG_OUT_OF_MEMORY, NULL);
return NULL;
}
return (new);
}
char *
ecpg_strdup(const char *string, int lineno)
{
char *new;
if (string == NULL)
return NULL;
new = strdup(string);
if (!new)
{
ecpg_raise(lineno, ECPG_OUT_OF_MEMORY, ECPG_SQLSTATE_ECPG_OUT_OF_MEMORY, NULL);
return NULL;
}
return (new);
}
/* keep a list of memory we allocated for the user */
struct auto_mem
{
void *pointer;
struct auto_mem *next;
};
#ifdef ENABLE_THREAD_SAFETY
static pthread_key_t auto_mem_key;
static pthread_once_t auto_mem_once = PTHREAD_ONCE_INIT;
static void
auto_mem_destructor(void *arg)
{
ECPGfree_auto_mem();
}
static void
auto_mem_key_init(void)
{
pthread_key_create(&auto_mem_key, auto_mem_destructor);
}
static struct auto_mem *
get_auto_allocs(void)
{
pthread_once(&auto_mem_once, auto_mem_key_init);
return (struct auto_mem *) pthread_getspecific(auto_mem_key);
}
static void
set_auto_allocs(struct auto_mem * am)
{
pthread_setspecific(auto_mem_key, am);
}
#else
static struct auto_mem *auto_allocs = NULL;
#define get_auto_allocs() (auto_allocs)
#define set_auto_allocs(am) do { auto_allocs = (am); } while(0)
#endif
void
ecpg_add_mem(void *ptr, int lineno)
{
struct auto_mem *am = (struct auto_mem *) ecpg_alloc(sizeof(struct auto_mem), lineno);
am->pointer = ptr;
am->next = get_auto_allocs();
set_auto_allocs(am);
}
void
ECPGfree_auto_mem(void)
{
struct auto_mem *am = get_auto_allocs();
/* free all memory we have allocated for the user */
if (am)
{
do
{
struct auto_mem *act = am;
am = am->next;
ecpg_free(act->pointer);
ecpg_free(act);
} while (am);
set_auto_allocs(NULL);
}
}
void
ecpg_clear_auto_mem(void)
{
struct auto_mem *am = get_auto_allocs();
/* only free our own structure */
if (am)
{
do
{
struct auto_mem *act = am;
am = am->next;
ecpg_free(act);
} while (am);
set_auto_allocs(NULL);
}
}
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