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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2003 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.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> |
+----------------------------------------------------------------------+
*/
#ifndef ZEND_PTR_STACK_H
#define ZEND_PTR_STACK_H
typedef struct _zend_ptr_stack {
int top, max;
void **elements;
void **top_element;
} zend_ptr_stack;
#define PTR_STACK_BLOCK_SIZE 64
ZEND_API void zend_ptr_stack_init(zend_ptr_stack *stack);
ZEND_API void zend_ptr_stack_n_push(zend_ptr_stack *stack, int count, ...);
ZEND_API void zend_ptr_stack_n_pop(zend_ptr_stack *stack, int count, ...);
ZEND_API void zend_ptr_stack_destroy(zend_ptr_stack *stack);
ZEND_API void zend_ptr_stack_apply(zend_ptr_stack *stack, void (*func)(void *));
ZEND_API void zend_ptr_stack_clean(zend_ptr_stack *stack, void (*func)(void *), zend_bool free_elements);
ZEND_API int zend_ptr_stack_num_elements(zend_ptr_stack *stack);
static inline void zend_ptr_stack_push(zend_ptr_stack *stack, void *ptr)
{
if (stack->top >= stack->max) { /* we need to allocate more memory */
stack->elements = (void **) erealloc(stack->elements, (sizeof(void *) * (stack->max *= 2 )));
stack->top_element = stack->elements+stack->top;
}
stack->top++;
*(stack->top_element++) = ptr;
}
static inline void *zend_ptr_stack_pop(zend_ptr_stack *stack)
{
stack->top--;
return *(--stack->top_element);
}
#endif /* ZEND_PTR_STACK_H */
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