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Doug Gregor
f2340ec9af
A C function returning a foreign reference or CoreFoundation type unretained cannot be safely implemented, because there is no way to ensure that the result object lives past the return. However, such C functions do exist, and we would like to be able to implement them via `@c @implementation`. Extend the signature-matching logic for `@implementation` to permit an `Unmanaged<T>` result even when the signature comes in an `T` to allow the use of `@implementation` here. Implements rdar://188429740
30 lines
945 B
C
30 lines
945 B
C
#include <CoreFoundation.h>
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#define CF_RETURNS_RETAINED __attribute__((cf_returns_retained))
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#define CF_RETURNS_NOT_RETAINED __attribute__((cf_returns_not_retained))
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#define CF_CONSUMED __attribute__((cf_consumed))
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void CImplTakesCFArray(CFArrayRef arr);
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void CImplTakesCFTree(CFTreeRef tree);
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void CImplTakesConsumedCFString(CF_CONSUMED CFStringRef string);
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CF_RETURNS_RETAINED
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CFStringRef CImplReturnsRetainedCFString(void);
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CF_RETURNS_NOT_RETAINED
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CFStringRef CImplReturnsNotRetainedCFString(void);
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// Not ownership-audited: imported as returning 'Unmanaged<CFString>?'.
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CFStringRef CImplReturnsUnauditedCFString(void);
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// 'CFTypeRef' is imported as 'AnyObject'.
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void CImplTakesCFTypeRef(CFTypeRef obj);
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CF_RETURNS_RETAINED
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CFTypeRef CImplReturnsRetainedCFTypeRef(void);
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// Not ownership-audited: imported as returning 'Unmanaged<CFTypeRef>?'.
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CFTypeRef CImplReturnsUnauditedCFTypeRef(void);
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#include "c_implementation_cf_audited.h"
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