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/*
   +----------------------------------------------------------------------+
   | Zend Engine                                                          |
   +----------------------------------------------------------------------+
   | Copyright (c) 1998-2016 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;

typedef struct _zend_generator_iterator {
	zend_object_iterator intern;

	/* The generator object handle has to be stored, because the
	 * iterator is holding a ref to it, which has to be dtored. */
	zend_object_handle handle;
} zend_generator_iterator;

typedef struct _zend_generator {
	zend_object std;

	zend_generator_iterator iterator;

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

	/* The separate stack used by generator */
	zend_vm_stack stack;

	/* Current value */
	zval *value;
	/* Current key */
	zval *key;
	/* Variable to put sent value into */
	zval **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);
ZEND_API zval *zend_generator_create_zval(zend_op_array *op_array TSRMLS_DC);
ZEND_API void zend_generator_close(zend_generator *generator, zend_bool finished_execution TSRMLS_DC);
ZEND_API void zend_generator_resume(zend_generator *generator TSRMLS_DC);

END_EXTERN_C()

#endif

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