+++ /dev/null
-/*
- * Copyright (c) 2012,2014 Apple Inc. All Rights Reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-
-
-#ifndef _SECCFRELEASE_H_
-#define _SECCFRELEASE_H_
-
-#include <CoreFoundation/CFBase.h>
-
-// Retains its argument unless it's NULL. Always returns its argument.
-#define CFRetainSafe(CF) ({ __typeof__(CF) _cf = (CF); _cf ? (CFRetain(_cf), _cf) : _cf; })
-
-// Releases CF unless it's NULL. Always returns NULL, for your convenience and constructs like:
-// return CFReleaseSafe(foo);
-#define CFReleaseSafe(CF) ({ __typeof__(CF) _cf = (CF); (_cf ? (CFRelease(_cf), ((__typeof__(CF))0)) : _cf); })
-
-
-#if 0
-// Objective-C defines &<bridged-object> to be a constant reference, which we can't assign to, so we
-// suffer multiple evaluations of arguments (avoid using it with side-effects) to make things compile well
-
-#define CFTransferRetained(VAR1, VAR2) ({ CFReleaseSafe(VAR1); VAR1 = VAR2; VAR2 = ((__typeof__(VAR2))0)); })
-
-#define CFAssignRetained(VAR, CF) ({ CFReleaseSafe(VAR); VAR1 = CF; CF = ((__typeof__(CF))0)); })
-
-#define CFRetainAssign(VAR,CF) ({ CFReleaseSafe(VAR); VAR = CFRetainSafe(CF); })
-
-#define CFReleaseNull(CF) ({ CFReleaseSafe(CF); CF = ((__typeof__(CF))0)); })
-
-#else
-
-// Assume VAR1 is NULL or an already retained object and CFReleaseSafe VAR1 and assigns VAR2 to VAR1. Returns VAR2.
-#define CFTransferRetained(VAR1, VAR2) ({ \
- __typeof__(VAR1) *const _pvar1 = &(VAR1); \
- __typeof__(VAR2) *const _pvar2 = &(VAR2); \
- __typeof__(VAR2) _var2 = *_pvar2; \
- (*_pvar2) = NULL; \
- (*_pvar1) = *_pvar1 ? (CFRelease(*_pvar1), _var2) : _var2; \
-})
-
-
-// Assume CF is NULL or an already retained object and CFReleaseSafe VAR and assigns CF to VAR. Returns CF.
-#define CFAssignRetained(VAR,CF) ({ \
- __typeof__(VAR) *const _pvar = &(VAR); \
- __typeof__(CF) _cf = (CF); \
- (*_pvar) = *_pvar ? (CFRelease(*_pvar), _cf) : _cf; \
-})
-
-// CFRetainSafe CF and CFReleaseSafe VAR and assigns CF to VAR. Returns CF.
-#define CFRetainAssign(VAR,CF) ({ \
- __typeof__(VAR) *const _pvar = &(VAR); \
- __typeof__(CF) _cf = (CF); \
- (((*_pvar) == _cf) ? _cf \
- : ((*_pvar) = (_cf ? (CFRetain(_cf), (*_pvar ? (CFRelease(*_pvar), _cf) : _cf)) \
- : (CFRelease(*_pvar), ((__typeof__(_cf))0))))); \
-})
-
-
-// Assigns NULL to CF. Releases the value stored at CF unless it was NULL. Always returns NULL, for your convenience
-#define CFReleaseNull(CF) ({ __typeof__(CF) *const _pcf = &(CF), _cf = *_pcf; (_cf ? (*_pcf) = ((__typeof__(CF))0), (CFRelease(_cf), ((__typeof__(CF))0)) : _cf); })
-
-#endif
-
-#endif /* _SECCFRELEASE_H_ */