Storing zvals in hash tables in resources

I'm trying to store zvals in a hash table which is part of a resource.
Unfortunately the zvals do not seem to "persist" between function calls:

<?php
$ctx = foo_create_context();
foo_assign_value($ctx, "foo", "bar");

// prints NULL:
var_dump(foo_get_value($ctx, "foo"));
?>

Please see my code below. In foo_get_value zend_hash_find() does not
return FAILURE, so the key is there while the value is gone. Can
someone spot my mistake?

• Martin

typedef struct _foo_context {
HashTable *variables;
} foo_context;

PHP_FUNCTION(foo_create_context) {
foo_context *ctx;
ctx = emalloc(sizeof(foo_context));

ALLOC_HASHTABLE(ctx->variables);
zend_hash_init(ctx->variables, 32, NULL, NULL, 0);

ZEND_REGISTER_RESOURCE(return_value, ctx, le_foo_context);

}

PHP_FUNCTION(foo_assign_value) {
foo_context *ctx;
zval *zcontext;
char *name;
int name_len;
zval *value;

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "rsz",
    &zcontext, &name, &name_len, &value) == FAILURE)
{
    return;
}

ZEND_FETCH_RESOURCE(ctx, foo_context*, &zcontext, -1,
    FOO_CONTEXT_RES_NAME, le_adl_context);

zend_hash_update(ctx->variables, name, name_len + 1, &value,

sizeof(zval*), NULL);
}

PHP_FUNCTION(foo_get_value) {
foo_context *ctx;
zval *zcontext;
char *name;
int name_len;

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "rs",
    &zcontext, &name, &name_len) == FAILURE)
{
    return;
}

ZEND_FETCH_RESOURCE(ctx, foo_context*, &zcontext, -1,

FOO_CONTEXT_RES_NAME, le_foo_context);

zval **value;
if (zend_hash_find(ctx->variables, name, name_len + 1,

(void**)&value) == FAILURE) {
return;
}

RETVAL_ZVAL(*value, 1, 0);

}