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Edit File : zend_ptr_stack.h \| Size : 4.19 KB
/* +----------------------------------------------------------------------+ \| Zend Engine \| +----------------------------------------------------------------------+ \| Copyright (c) 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@php.net> \| \| Zeev Suraski <zeev@php.net> \| +----------------------------------------------------------------------+ / #ifndef ZEND_PTR_STACK_H #define ZEND_PTR_STACK_H typedef struct _zend_ptr_stack { int top, max; void elements; void top_element; 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, 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_reverse_apply(zend_ptr_stack stack, void (func)(void )); ZEND_API void zend_ptr_stack_clean(zend_ptr_stack stack, void (func)(void ), 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); } static zend_always_inline void zend_ptr_stack_top(zend_ptr_stack stack) { return stack->elements[stack->top - 1]; } #endif /* ZEND_PTR_STACK_H */ Back

Edit File : zend_ptr_stack.h | Size : 4.19 KB

/*
   +----------------------------------------------------------------------+
   | Zend Engine                                                          |
   +----------------------------------------------------------------------+
   | Copyright (c) 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@php.net>                                 |
   |          Zeev Suraski <zeev@php.net>                                 |
   +----------------------------------------------------------------------+
*/

#ifndef ZEND_PTR_STACK_H
#define ZEND_PTR_STACK_H

typedef struct _zend_ptr_stack {
	int top, max;
	void **elements;
	void **top_element;
	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, 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_reverse_apply(zend_ptr_stack *stack, void (*func)(void *));
ZEND_API void zend_ptr_stack_clean(zend_ptr_stack *stack, void (*func)(void *), 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);
}

static zend_always_inline void *zend_ptr_stack_top(zend_ptr_stack *stack)
{
    return stack->elements[stack->top - 1];
}

#endif /* ZEND_PTR_STACK_H */

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