Annotation of embedaddon/php/Zend/zend_ptr_stack.h, revision 1.1.1.3
1.1 misho 1: /*
2: +----------------------------------------------------------------------+
3: | Zend Engine |
4: +----------------------------------------------------------------------+
1.1.1.3 ! misho 5: | Copyright (c) 1998-2013 Zend Technologies Ltd. (http://www.zend.com) |
1.1 misho 6: +----------------------------------------------------------------------+
7: | This source file is subject to version 2.00 of the Zend license, |
8: | that is bundled with this package in the file LICENSE, and is |
9: | available through the world-wide-web at the following url: |
10: | http://www.zend.com/license/2_00.txt. |
11: | If you did not receive a copy of the Zend license and are unable to |
12: | obtain it through the world-wide-web, please send a note to |
13: | license@zend.com so we can mail you a copy immediately. |
14: +----------------------------------------------------------------------+
15: | Authors: Andi Gutmans <andi@zend.com> |
16: | Zeev Suraski <zeev@zend.com> |
17: +----------------------------------------------------------------------+
18: */
19:
1.1.1.2 misho 20: /* $Id$ */
1.1 misho 21:
22: #ifndef ZEND_PTR_STACK_H
23: #define ZEND_PTR_STACK_H
24:
25: typedef struct _zend_ptr_stack {
26: int top, max;
27: void **elements;
28: void **top_element;
29: zend_bool persistent;
30: } zend_ptr_stack;
31:
32:
33: #define PTR_STACK_BLOCK_SIZE 64
34:
35: BEGIN_EXTERN_C()
36: ZEND_API void zend_ptr_stack_init(zend_ptr_stack *stack);
37: ZEND_API void zend_ptr_stack_init_ex(zend_ptr_stack *stack, zend_bool persistent);
38: ZEND_API void zend_ptr_stack_n_push(zend_ptr_stack *stack, int count, ...);
39: ZEND_API void zend_ptr_stack_n_pop(zend_ptr_stack *stack, int count, ...);
40: ZEND_API void zend_ptr_stack_destroy(zend_ptr_stack *stack);
41: ZEND_API void zend_ptr_stack_apply(zend_ptr_stack *stack, void (*func)(void *));
42: ZEND_API void zend_ptr_stack_clean(zend_ptr_stack *stack, void (*func)(void *), zend_bool free_elements);
43: ZEND_API int zend_ptr_stack_num_elements(zend_ptr_stack *stack);
44: END_EXTERN_C()
45:
46: #define ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, count) \
47: if (stack->top+count > stack->max) { \
48: /* we need to allocate more memory */ \
1.1.1.2 misho 49: do { \
50: stack->max += PTR_STACK_BLOCK_SIZE; \
51: } while (stack->top+count > stack->max); \
1.1 misho 52: stack->elements = (void **) perealloc(stack->elements, (sizeof(void *) * (stack->max)), stack->persistent); \
53: stack->top_element = stack->elements+stack->top; \
54: }
55:
56: /* Not doing this with a macro because of the loop unrolling in the element assignment.
57: Just using a macro for 3 in the body for readability sake. */
1.1.1.2 misho 58: static zend_always_inline void zend_ptr_stack_3_push(zend_ptr_stack *stack, void *a, void *b, void *c)
1.1 misho 59: {
60: #define ZEND_PTR_STACK_NUM_ARGS 3
61:
62: ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, ZEND_PTR_STACK_NUM_ARGS)
63:
64: stack->top += ZEND_PTR_STACK_NUM_ARGS;
65: *(stack->top_element++) = a;
66: *(stack->top_element++) = b;
67: *(stack->top_element++) = c;
68:
69: #undef ZEND_PTR_STACK_NUM_ARGS
70: }
71:
1.1.1.2 misho 72: static zend_always_inline void zend_ptr_stack_2_push(zend_ptr_stack *stack, void *a, void *b)
1.1 misho 73: {
74: #define ZEND_PTR_STACK_NUM_ARGS 2
75:
76: ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, ZEND_PTR_STACK_NUM_ARGS)
77:
78: stack->top += ZEND_PTR_STACK_NUM_ARGS;
79: *(stack->top_element++) = a;
80: *(stack->top_element++) = b;
81:
82: #undef ZEND_PTR_STACK_NUM_ARGS
83: }
84:
1.1.1.2 misho 85: static zend_always_inline void zend_ptr_stack_3_pop(zend_ptr_stack *stack, void **a, void **b, void **c)
1.1 misho 86: {
87: *a = *(--stack->top_element);
88: *b = *(--stack->top_element);
89: *c = *(--stack->top_element);
90: stack->top -= 3;
91: }
92:
1.1.1.2 misho 93: static zend_always_inline void zend_ptr_stack_2_pop(zend_ptr_stack *stack, void **a, void **b)
1.1 misho 94: {
95: *a = *(--stack->top_element);
96: *b = *(--stack->top_element);
97: stack->top -= 2;
98: }
99:
1.1.1.2 misho 100: static zend_always_inline void zend_ptr_stack_push(zend_ptr_stack *stack, void *ptr)
1.1 misho 101: {
102: ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, 1)
103:
104: stack->top++;
105: *(stack->top_element++) = ptr;
106: }
107:
1.1.1.2 misho 108: static zend_always_inline void *zend_ptr_stack_pop(zend_ptr_stack *stack)
1.1 misho 109: {
110: stack->top--;
111: return *(--stack->top_element);
112: }
113:
114: #endif /* ZEND_PTR_STACK_H */
115:
116: /*
117: * Local variables:
118: * tab-width: 4
119: * c-basic-offset: 4
120: * indent-tabs-mode: t
121: * End:
122: */
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