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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998, 1999 Andi Gutmans, Zeev Suraski |
+----------------------------------------------------------------------+
| This source file is subject to version 0.91 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.zend.com/license/0_91.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@zend.com> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/


/* resource lists */

#include "zend.h"
#include "zend_list.h"
#include "zend_API.h"
#include "zend_globals.h"

ZEND_API int le_index_ptr;

static inline int zend_list_do_insert(HashTable *list,void *ptr, int type)
{
int index;
list_entry le;

index = zend_hash_next_free_element(list);

if (index==0) index++;

le.ptr=ptr;
le.type=type;
le.refcount=1;
zend_hash_index_update(list, index, (void *) &le, sizeof(list_entry), NULL);
return index;
}

static inline int zend_list_do_delete(HashTable *list,int id)
{
list_entry *le;
ELS_FETCH();

if (zend_hash_index_find(&EG(regular_list), id, (void **) &le)==SUCCESS) {
/* printf("del(%d): %d->%d\n", id, le->refcount, le->refcount-1); */
if (--le->refcount<=0) {
return zend_hash_index_del(&EG(regular_list), id);
} else {
return SUCCESS;
}
} else {
return FAILURE;
}
}


static inline void *zend_list_do_find(HashTable *list,int id, int *type)
{
list_entry *le;

if (zend_hash_index_find(list, id, (void **) &le)==SUCCESS) {
*type = le->type;
return le->ptr;
} else {
*type = -1;
return NULL;
}
}


ZEND_API int zend_list_insert(void *ptr, int type)
{
ELS_FETCH();

return zend_list_do_insert(&EG(regular_list), ptr, type);
}


ZEND_API int zend_plist_insert(void *ptr, int type)
{
ELS_FETCH();

return zend_list_do_insert(&EG(persistent_list), ptr, type);
}


ZEND_API int zend_list_addref(int id)
{
list_entry *le;
ELS_FETCH();

if (zend_hash_index_find(&EG(regular_list), id, (void **) &le)==SUCCESS) {
/* printf("add(%d): %d->%d\n", id, le->refcount, le->refcount+1); */
le->refcount++;
return SUCCESS;
} else {
return FAILURE;
}
}


ZEND_API int zend_list_delete(int id)
{
ELS_FETCH();

return zend_list_do_delete(&EG(regular_list), id);
}


ZEND_API int zend_plist_delete(int id)
{
ELS_FETCH();

return zend_list_do_delete(&EG(persistent_list), id);
}


ZEND_API void *zend_list_find(int id, int *type)
{
ELS_FETCH();

return zend_list_do_find(&EG(regular_list), id, type);
}


ZEND_API void *zend_plist_find(int id, int *type)
{
ELS_FETCH();

return zend_list_do_find(&EG(persistent_list), id, type);
}


ZEND_API int zend_register_resource(zval *rsrc_result, void *rsrc_pointer, int rsrc_type)
{
int rsrc_id;

rsrc_id = zend_list_insert(rsrc_pointer, rsrc_type);

if (rsrc_result) {
rsrc_result->value.lval = rsrc_id;
rsrc_result->type = IS_RESOURCE;
}

return rsrc_id;
}


ZEND_API void *zend_fetch_resource(zval **passed_id, int default_id, char *resource_type_name, int *found_resource_type, int num_resource_types, ...)
{
int id;
int actual_resource_type;
void *resource;
va_list resource_types;
int i;

if (default_id==-1) { /* use id */
if (!passed_id) {
if (resource_type_name) {
zend_error(E_WARNING, "No %s resource supplied", resource_type_name);
}
return NULL;
} else if ((*passed_id)->type != IS_RESOURCE) {
if (resource_type_name) {
zend_error(E_WARNING, "Supplied argument is not a valid %s resource", resource_type_name);
}
return NULL;
}
id = (*passed_id)->value.lval;
} else {
id = default_id;
}

resource = zend_list_find(id, &actual_resource_type);
if (!resource) {
if (resource_type_name)
zend_error(E_WARNING, "%d is not a valid %s resource", id, resource_type_name);
return NULL;
}

va_start(resource_types, num_resource_types);
for (i=0; i<num_resource_types; i++) {
if (actual_resource_type == va_arg(resource_types, int)) {
va_end(resource_types);
if (found_resource_type) {
*found_resource_type = actual_resource_type;
}
return resource;
}
}
va_end(resource_types);

if (resource_type_name)
zend_error(E_WARNING, "Supplied resource is not a valid %s resource", resource_type_name);

return NULL;
}


int list_entry_destructor(void *ptr)
{
list_entry *le = (list_entry *) ptr;
list_destructors_entry *ld;

if (zend_hash_index_find(&list_destructors,le->type,(void **) &ld)==SUCCESS) {
if (ld->list_destructor) {
(ld->list_destructor)(le->ptr);
}
} else {
zend_error(E_WARNING,"Unknown list entry type in request shutdown (%d)",le->type);
}
return 1;
}


int plist_entry_destructor(void *ptr)
{
list_entry *le = (list_entry *) ptr;
list_destructors_entry *ld;

if (zend_hash_index_find(&list_destructors,le->type,(void **) &ld)==SUCCESS) {
if (ld->plist_destructor) {
(ld->plist_destructor)(le->ptr);
}
} else {
zend_error(E_WARNING,"Unknown persistent list entry type in module shutdown (%d)",le->type);
}
return 1;
}


int init_resource_list(ELS_D)
{
return zend_hash_init(&EG(regular_list), 0, NULL, list_entry_destructor, 0);
}


int init_resource_plist(ELS_D)
{
return zend_hash_init(&EG(persistent_list), 0, NULL, plist_entry_destructor, 1);
}


void destroy_resource_list(void)
{
ELS_FETCH();

zend_hash_destroy(&EG(regular_list));
}


void destroy_resource_plist(void)
{
ELS_FETCH();

zend_hash_destroy(&EG(persistent_list));
}


static int clean_module_resource(list_entry *le, int *resource_id)
{
if (le->type == *resource_id) {
return 1;
} else {
return 0;
}
}


int clean_module_resource_destructors(list_destructors_entry *ld, int *module_number)
{
if (ld->module_number == *module_number) {
ELS_FETCH();

zend_hash_apply_with_argument(&EG(persistent_list), (int (*)(void *,void *)) clean_module_resource, (void *) &(ld->resource_id));
return 1;
} else {
return 0;
}
}


/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/
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