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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2012 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: Nikita Popov <nikic@php.net> |
+----------------------------------------------------------------------+
*/

/* $Id$ */

#ifndef ZEND_GENERATORS_H
#define ZEND_GENERATORS_H

BEGIN_EXTERN_C()
extern ZEND_API zend_class_entry *zend_ce_generator;
END_EXTERN_C()

typedef struct _zend_generator {
zend_object std;

/* The suspended execution context. */
zend_execute_data *execute_data;

/* If the execution is suspended during a function call there may be
* arguments pushed to the stack, so it has to be backed up. */
void *backed_up_stack;
size_t backed_up_stack_size;

/* For method calls PHP also pushes various type information on a second
* stack, which also needs to be backed up. */
void **backed_up_arg_types_stack;
int backed_up_arg_types_stack_count;

/* The original stack top before resuming the generator. This is required
* for proper cleanup during exception handling. */
void **original_stack_top;

/* Current value */
zval *value;
/* Current key */
zval *key;
/* Variable to put sent value into */
temp_variable *send_target;
/* Largest used integer key for auto-incrementing keys */
long largest_used_integer_key;

/* ZEND_GENERATOR_* flags */
zend_uchar flags;
} zend_generator;

static const zend_uchar ZEND_GENERATOR_CURRENTLY_RUNNING = 0x1;
static const zend_uchar ZEND_GENERATOR_FORCED_CLOSE = 0x2;
static const zend_uchar ZEND_GENERATOR_AT_FIRST_YIELD = 0x4;

void zend_register_generator_ce(TSRMLS_D);
zval *zend_generator_create_zval(zend_op_array *op_array TSRMLS_DC);
void zend_generator_close(zend_generator *generator, zend_bool finished_execution TSRMLS_DC);
void zend_generator_resume(zend_generator *generator TSRMLS_DC);

#endif

/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
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