mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
948655e850
After rebasing on master and incorporating more 32-bit support, perform a bunch of cleanup, documentation updates, comments, move code back to String declaration, etc.
74 lines
2.8 KiB
Objective-C
74 lines
2.8 KiB
Objective-C
//===--- SwiftNativeNSXXXBaseARC.mm - Runtime stubs that require ARC ------===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See https://swift.org/LICENSE.txt for license information
|
|
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
#include "swift/Runtime/Config.h"
|
|
|
|
#if SWIFT_OBJC_INTEROP
|
|
|
|
#import <Foundation/Foundation.h>
|
|
#import <CoreFoundation/CoreFoundation.h>
|
|
#include <objc/NSObject.h>
|
|
#include <objc/runtime.h>
|
|
#include <objc/objc.h>
|
|
|
|
// The following two routines need to be implemented in ARC because
|
|
// decomposedStringWithCanonicalMapping returns its result autoreleased. And we
|
|
// want ARC to insert 'objc_retainAutoreleasedReturnValue' and the necessary
|
|
// markers for the hand-off to facilitate the remove from autorelease pool
|
|
// optimization such that the object is not handed into the current autorelease
|
|
// pool which might be scoped such that repeatedly placing objects into it
|
|
// results in unbounded memory growth.
|
|
|
|
// On i386 the remove from autorelease pool optimization is foiled by the
|
|
// decomposedStringWithCanonicalMapping implementation. Instead, we use a local
|
|
// autorelease pool to prevent leaking of the temporary object into the callers
|
|
// autorelease pool.
|
|
//
|
|
//
|
|
// FIXME: Right now we force an autoreleasepool here on x86_64 where we really
|
|
// do not want to do so. The reason why is that without the autoreleasepool (or
|
|
// really something like a defer), we tail call
|
|
// objc_retainAutoreleasedReturnValue which blocks the hand shake. Evidently
|
|
// this is something that we do not want to do. See:
|
|
// b79ff50f1bca97ecfd053372f5f6dc9d017398bc. Until that is resolved, just create
|
|
// an autoreleasepool here on x86_64. On arm/arm64 we do not have such an issue
|
|
// since we use an assembly marker instead.
|
|
#if defined(__i386__) || defined(__x86_64__)
|
|
#define AUTORELEASEPOOL @autoreleasepool
|
|
#else
|
|
// On other platforms we rely on the remove from autorelease pool optimization.
|
|
#define AUTORELEASEPOOL
|
|
#endif
|
|
|
|
SWIFT_CC(swift) SWIFT_RUNTIME_STDLIB_API
|
|
size_t swift_stdlib_NSStringHashValue(NSString *str,
|
|
bool isASCII) {
|
|
AUTORELEASEPOOL {
|
|
return isASCII ? str.hash : str.decomposedStringWithCanonicalMapping.hash;
|
|
}
|
|
}
|
|
|
|
SWIFT_CC(swift) SWIFT_RUNTIME_STDLIB_API
|
|
size_t
|
|
swift_stdlib_NSStringHashValuePointer(void *opaque, bool isASCII) {
|
|
NSString __unsafe_unretained *str =
|
|
(__bridge NSString __unsafe_unretained *)opaque;
|
|
AUTORELEASEPOOL {
|
|
return isASCII ? str.hash : str.decomposedStringWithCanonicalMapping.hash;
|
|
}
|
|
}
|
|
|
|
#else
|
|
|
|
extern char ignore_pedantic_warning;
|
|
|
|
#endif
|