mDNSMacOSX/mdns_objects/mdns_base.h

   1 /*
   2  * Copyright (c) 2019-2020 Apple Inc. All rights reserved.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     https://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef __MDNS_BASE_H__
  18 #define __MDNS_BASE_H__
  19
  20 #include <os/object.h>
  21
  22 #if defined(MDNS_OBJECT_FORCE_NO_OBJC) && MDNS_OBJECT_FORCE_NO_OBJC
  23         #define MDNS_OBJECT_USE_OBJC    0
  24 #else
  25         #define MDNS_OBJECT_USE_OBJC    OS_OBJECT_USE_OBJC
  26 #endif
  27
  28 #if MDNS_OBJECT_USE_OBJC
  29         #define MDNS_RETURNS_RETAINED                   OS_OBJECT_RETURNS_RETAINED
  30         #define MDNS_DECL(NAME)                                 OS_OBJECT_DECL_SUBCLASS(mdns_ ## NAME, mdns_object)
  31         #define MDNS_DECL_SUBKIND(NAME, SUPER)  OS_OBJECT_DECL_SUBCLASS(mdns_ ## NAME, mdns_ ## SUPER)
  32         OS_OBJECT_DECL(mdns_object,);
  33 #else
  34         #define MDNS_RETURNS_RETAINED
  35         #define MDNS_DECL(NAME)                                 typedef struct mdns_ ## NAME ## _s *    mdns_ ## NAME ## _t
  36         #define MDNS_DECL_SUBKIND(NAME, SUPER)  MDNS_DECL(NAME)
  37         MDNS_DECL(object);
  38 #endif
  39
  40 #define MDNS_WARN_RESULT                                                OS_WARN_RESULT
  41 #define MDNS_ASSUME_NONNULL_BEGIN                               OS_ASSUME_NONNULL_BEGIN
  42 #define MDNS_ASSUME_NONNULL_END                                 OS_ASSUME_NONNULL_END
  43 #define MDNS_PRINTF_FORMAT(FMT_IDX, ARGS_IDX)   __attribute__((__format__ (__printf__, FMT_IDX, ARGS_IDX)))
  44
  45 #define MDNS_UNION_MEMBER(NAME) struct mdns_ ## NAME ## _s *    NAME
  46
  47 #define mdns_forget_with_invalidation(X, NAME)  \
  48         do {                                                                            \
  49                 if (*(X)) {                                                             \
  50                         mdns_ ## NAME ## _invalidate(*(X));     \
  51                         mdns_release_arc_safe(*(X));            \
  52                         *(X) = NULL;                                            \
  53                 }                                                                               \
  54         } while (0)
  55
  56 #endif  // __MDNS_BASE_H__