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76 lines
2.6 KiB
Objective-C
76 lines
2.6 KiB
Objective-C
//===--- SwiftNativeNSXXXBaseARC.mm - Runtime stubs that require ARC ------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include "swift/Runtime/Config.h"
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#if SWIFT_OBJC_INTEROP
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#import <Foundation/Foundation.h>
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#import <CoreFoundation/CoreFoundation.h>
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#include <objc/NSObject.h>
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#include <objc/runtime.h>
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#include <objc/objc.h>
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// The following two routines need to be implemented in ARC because
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// decomposedStringWithCanonicalMapping returns its result autoreleased. And we
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// want ARC to insert 'objc_retainAutoreleasedReturnValue' and the necessary
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// markers for the hand-off to facilitate the remove from autorelease pool
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// optimization such that the object is not handed into the current autorelease
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// pool which might be scoped such that repeatedly placing objects into it
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// results in unbounded memory growth.
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// On i386 the remove from autorelease pool optimization is foiled by the
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// decomposedStringWithCanonicalMapping implementation. Instead, we use a local
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// autorelease pool to prevent leaking of the temporary object into the callers
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// autorelease pool.
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#if defined(__i386__)
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#define AUTORELEASEPOOL @autoreleasepool
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#else
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// On other platforms we rely on the remove from autorelease pool optimization.
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#define AUTORELEASEPOOL
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#endif
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SWIFT_CC(swift) SWIFT_RUNTIME_STDLIB_INTERFACE
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size_t swift_stdlib_NSStringHashValue(NSString *NS_RELEASES_ARGUMENT str,
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bool isASCII) {
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AUTORELEASEPOOL {
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return isASCII ? str.hash : str.decomposedStringWithCanonicalMapping.hash;
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}
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}
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SWIFT_CC(swift) SWIFT_RUNTIME_STDLIB_INTERFACE
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size_t
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swift_stdlib_NSStringHashValuePointer(void *opaque, bool isASCII) {
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NSString __unsafe_unretained *str =
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(__bridge NSString __unsafe_unretained *)opaque;
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AUTORELEASEPOOL {
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return isASCII ? str.hash : str.decomposedStringWithCanonicalMapping.hash;
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}
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}
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SWIFT_CC(swift) SWIFT_RUNTIME_STDLIB_INTERFACE
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NS_RETURNS_RETAINED NSString *
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swift_stdlib_NSStringLowercaseString(NSString *NS_RELEASES_ARGUMENT str) {
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AUTORELEASEPOOL {
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return str.lowercaseString;
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}
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}
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SWIFT_CC(swift) SWIFT_RUNTIME_STDLIB_INTERFACE
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NS_RETURNS_RETAINED NSString *
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swift_stdlib_NSStringUppercaseString(NSString *NS_RELEASES_ARGUMENT str) {
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AUTORELEASEPOOL {
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return str.uppercaseString;
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}
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}
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#endif
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