mirror of
https://github.com/php/php-src.git
synced 2024-11-28 12:26:37 +08:00
123 lines
4.1 KiB
C
123 lines
4.1 KiB
C
/*
|
|
+----------------------------------------------------------------------+
|
|
| Zend Engine |
|
|
+----------------------------------------------------------------------+
|
|
| Copyright (c) 1998-2011 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> |
|
|
+----------------------------------------------------------------------+
|
|
*/
|
|
|
|
/* $Id$ */
|
|
|
|
#ifndef ZEND_PTR_STACK_H
|
|
#define ZEND_PTR_STACK_H
|
|
|
|
typedef struct _zend_ptr_stack {
|
|
int top, max;
|
|
void **elements;
|
|
void **top_element;
|
|
zend_bool persistent;
|
|
} zend_ptr_stack;
|
|
|
|
|
|
#define PTR_STACK_BLOCK_SIZE 64
|
|
|
|
BEGIN_EXTERN_C()
|
|
ZEND_API void zend_ptr_stack_init(zend_ptr_stack *stack);
|
|
ZEND_API void zend_ptr_stack_init_ex(zend_ptr_stack *stack, zend_bool persistent);
|
|
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);
|
|
END_EXTERN_C()
|
|
|
|
#define ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, count) \
|
|
if (stack->top+count > stack->max) { \
|
|
/* we need to allocate more memory */ \
|
|
do { \
|
|
stack->max += PTR_STACK_BLOCK_SIZE; \
|
|
} while (stack->top+count > stack->max); \
|
|
stack->elements = (void **) perealloc(stack->elements, (sizeof(void *) * (stack->max)), stack->persistent); \
|
|
stack->top_element = stack->elements+stack->top; \
|
|
}
|
|
|
|
/* Not doing this with a macro because of the loop unrolling in the element assignment.
|
|
Just using a macro for 3 in the body for readability sake. */
|
|
static zend_always_inline void zend_ptr_stack_3_push(zend_ptr_stack *stack, void *a, void *b, void *c)
|
|
{
|
|
#define ZEND_PTR_STACK_NUM_ARGS 3
|
|
|
|
ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, ZEND_PTR_STACK_NUM_ARGS)
|
|
|
|
stack->top += ZEND_PTR_STACK_NUM_ARGS;
|
|
*(stack->top_element++) = a;
|
|
*(stack->top_element++) = b;
|
|
*(stack->top_element++) = c;
|
|
|
|
#undef ZEND_PTR_STACK_NUM_ARGS
|
|
}
|
|
|
|
static zend_always_inline void zend_ptr_stack_2_push(zend_ptr_stack *stack, void *a, void *b)
|
|
{
|
|
#define ZEND_PTR_STACK_NUM_ARGS 2
|
|
|
|
ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, ZEND_PTR_STACK_NUM_ARGS)
|
|
|
|
stack->top += ZEND_PTR_STACK_NUM_ARGS;
|
|
*(stack->top_element++) = a;
|
|
*(stack->top_element++) = b;
|
|
|
|
#undef ZEND_PTR_STACK_NUM_ARGS
|
|
}
|
|
|
|
static zend_always_inline void zend_ptr_stack_3_pop(zend_ptr_stack *stack, void **a, void **b, void **c)
|
|
{
|
|
*a = *(--stack->top_element);
|
|
*b = *(--stack->top_element);
|
|
*c = *(--stack->top_element);
|
|
stack->top -= 3;
|
|
}
|
|
|
|
static zend_always_inline void zend_ptr_stack_2_pop(zend_ptr_stack *stack, void **a, void **b)
|
|
{
|
|
*a = *(--stack->top_element);
|
|
*b = *(--stack->top_element);
|
|
stack->top -= 2;
|
|
}
|
|
|
|
static zend_always_inline void zend_ptr_stack_push(zend_ptr_stack *stack, void *ptr)
|
|
{
|
|
ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, 1)
|
|
|
|
stack->top++;
|
|
*(stack->top_element++) = ptr;
|
|
}
|
|
|
|
static zend_always_inline void *zend_ptr_stack_pop(zend_ptr_stack *stack)
|
|
{
|
|
stack->top--;
|
|
return *(--stack->top_element);
|
|
}
|
|
|
|
#endif /* ZEND_PTR_STACK_H */
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*/
|