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/*
* Copyright (C) 2013-2024 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#
ifndef
JSManagedValue_h
#
define
JSManagedValue_h
#
include
<
JavaScriptCore/JSBase.h
>
#
include
<
JavaScriptCore/WebKitAvailability.h
>
#
if
defined(__OBJC__) && JSC_OBJC_API_ENABLED
@class
JSValue;
@class
JSContext;
/*
!
@interface
@discussion JSManagedValue represents a "conditionally retained" JSValue.
"Conditionally retained" means that as long as the JSManagedValue's
JSValue is reachable through the JavaScript object graph,
or through the Objective-C object graph reported to the JSVirtualMachine using
addManagedReference:withOwner:, the corresponding JSValue will
be retained. However, if neither graph reaches the JSManagedValue, the
corresponding JSValue will be released and set to nil.
The primary use for a JSManagedValue is to store a JSValue in an Objective-C
or Swift object that is exported to JavaScript. It is incorrect to store a JSValue
in an object that is exported to JavaScript, since doing so creates a retain cycle.
*/
NS_CLASS_AVAILABLE
(10_9, 7_0)
@interface
JSManagedValue
:
NSObject
/*
!
@method
@abstract Create a JSManagedValue from a JSValue.
@result The new JSManagedValue.
*/
+ (JSManagedValue *)
managedValueWithValue
:
(JSValue *)
value
;
+ (JSManagedValue *)
managedValueWithValue
:
(JSValue *)
value
andOwner
:
(
id
)
owner
JSC_API_AVAILABLE(macos(
10.10
), ios(
8.0
));
/*
!
@method
@abstract Create a JSManagedValue.
@result The new JSManagedValue.
*/
- (
instancetype
)
initWithValue
:
(JSValue *)
value
;
/*
!
@property
@abstract Get the JSValue from the JSManagedValue.
@result The corresponding JSValue for this JSManagedValue or
nil if the JSValue has been collected.
*/
@property
(
readonly
,
strong
) JSValue *value;
@end
#
endif
#
endif
/*
JSManagedValue_h
*/
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