OSX/utilities/SecDispatchRelease.h

   1 /*
   2  * Copyright (c) 2012-2014 Apple Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24
  25
  26 #ifndef _SECDISPATCHRELEASE_H_
  27 #define _SECDISPATCHRELEASE_H_
  28
  29 #include <dispatch/dispatch.h>
  30 #include <xpc/xpc.h>
  31
  32 #define dispatch_retain_safe(DO) {  \
  33     __typeof__(DO) _do = (DO);      \
  34     if (_do)                        \
  35         dispatch_retain(_do);       \
  36 }
  37
  38 #define dispatch_release_safe(DO) { \
  39     __typeof__(DO) _do = (DO);      \
  40     if (_do)                        \
  41         dispatch_release(_do);      \
  42 }
  43
  44 #define dispatch_release_null(DO) { \
  45     __typeof__(DO) _do = (DO);      \
  46     if (_do) {                      \
  47         (DO) = NULL;                \
  48         dispatch_release(_do);      \
  49     }                               \
  50 }
  51
  52
  53 #define xpc_retain_safe(XO) {  \
  54     __typeof__(XO) _xo = (XO); \
  55     if (_xo)                   \
  56         xpc_retain(_xo);       \
  57 }
  58
  59 #define xpc_release_safe(XO) { \
  60     __typeof__(XO) _xo = (XO); \
  61     if (_xo)                   \
  62         xpc_release(_xo);      \
  63 }
  64
  65 #define xpc_release_null(XO) {  \
  66     __typeof__(XO) _xo = (XO); \
  67     if (_xo) {                  \
  68         (XO) = NULL;            \
  69         xpc_release(_xo);       \
  70     }                           \
  71 }
  72
  73 #endif
  74