dispatch/base.h

   1 /*
   2  * Copyright (c) 2008-2012 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_APACHE_LICENSE_HEADER_START@
   5  *
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  *
  18  * @APPLE_APACHE_LICENSE_HEADER_END@
  19  */
  20
  21 #ifndef __DISPATCH_BASE__
  22 #define __DISPATCH_BASE__
  23
  24 #ifndef __DISPATCH_INDIRECT__
  25 #error "Please #include <dispatch/dispatch.h> instead of this file directly."
  26 #endif
  27
  28 #if __GNUC__
  29 #define DISPATCH_NORETURN __attribute__((__noreturn__))
  30 #define DISPATCH_NOTHROW __attribute__((__nothrow__))
  31 #define DISPATCH_NONNULL1 __attribute__((__nonnull__(1)))
  32 #define DISPATCH_NONNULL2 __attribute__((__nonnull__(2)))
  33 #define DISPATCH_NONNULL3 __attribute__((__nonnull__(3)))
  34 #define DISPATCH_NONNULL4 __attribute__((__nonnull__(4)))
  35 #define DISPATCH_NONNULL5 __attribute__((__nonnull__(5)))
  36 #define DISPATCH_NONNULL6 __attribute__((__nonnull__(6)))
  37 #define DISPATCH_NONNULL7 __attribute__((__nonnull__(7)))
  38 #if __clang__ && __clang_major__ < 3
  39 // rdar://problem/6857843
  40 #define DISPATCH_NONNULL_ALL
  41 #else
  42 #define DISPATCH_NONNULL_ALL __attribute__((__nonnull__))
  43 #endif
  44 #define DISPATCH_SENTINEL __attribute__((__sentinel__))
  45 #define DISPATCH_PURE __attribute__((__pure__))
  46 #define DISPATCH_CONST __attribute__((__const__))
  47 #define DISPATCH_WARN_RESULT __attribute__((__warn_unused_result__))
  48 #define DISPATCH_MALLOC __attribute__((__malloc__))
  49 #define DISPATCH_ALWAYS_INLINE __attribute__((__always_inline__))
  50 #else
  51 /*! @parseOnly */
  52 #define DISPATCH_NORETURN
  53 /*! @parseOnly */
  54 #define DISPATCH_NOTHROW
  55 /*! @parseOnly */
  56 #define DISPATCH_NONNULL1
  57 /*! @parseOnly */
  58 #define DISPATCH_NONNULL2
  59 /*! @parseOnly */
  60 #define DISPATCH_NONNULL3
  61 /*! @parseOnly */
  62 #define DISPATCH_NONNULL4
  63 /*! @parseOnly */
  64 #define DISPATCH_NONNULL5
  65 /*! @parseOnly */
  66 #define DISPATCH_NONNULL6
  67 /*! @parseOnly */
  68 #define DISPATCH_NONNULL7
  69 /*! @parseOnly */
  70 #define DISPATCH_NONNULL_ALL
  71 /*! @parseOnly */
  72 #define DISPATCH_SENTINEL
  73 /*! @parseOnly */
  74 #define DISPATCH_PURE
  75 /*! @parseOnly */
  76 #define DISPATCH_CONST
  77 /*! @parseOnly */
  78 #define DISPATCH_WARN_RESULT
  79 /*! @parseOnly */
  80 #define DISPATCH_MALLOC
  81 /*! @parseOnly */
  82 #define DISPATCH_ALWAYS_INLINE
  83 #endif
  84
  85
  86 #if TARGET_OS_WIN32 && defined(__DISPATCH_BUILDING_DISPATCH__) && \
  87                 defined(__cplusplus)
  88 #define DISPATCH_EXPORT extern "C" extern __declspec(dllexport)
  89 #elif TARGET_OS_WIN32 && defined(__DISPATCH_BUILDING_DISPATCH__)
  90 #define DISPATCH_EXPORT extern __declspec(dllexport)
  91 #elif TARGET_OS_WIN32 && defined(__cplusplus)
  92 #define DISPATCH_EXPORT extern "C" extern __declspec(dllimport)
  93 #elif TARGET_OS_WIN32
  94 #define DISPATCH_EXPORT extern __declspec(dllimport)
  95 #elif __GNUC__
  96 #define DISPATCH_EXPORT extern __attribute__((visibility("default")))
  97 #else
  98 #define DISPATCH_EXPORT extern
  99 #endif
 100
 101 #if __GNUC__
 102 #define DISPATCH_INLINE static __inline__
 103 #else
 104 #define DISPATCH_INLINE static inline
 105 #endif
 106
 107 #if __GNUC__
 108 #define DISPATCH_EXPECT(x, v) __builtin_expect((x), (v))
 109 #else
 110 #define DISPATCH_EXPECT(x, v) (x)
 111 #endif
 112
 113 #if defined(__has_feature)
 114 #if __has_feature(objc_fixed_enum)
 115 #define DISPATCH_ENUM(name, type, ...) \
 116                 typedef enum : type { __VA_ARGS__ } name##_t
 117 #else
 118 #define DISPATCH_ENUM(name, type, ...) \
 119                 enum { __VA_ARGS__ }; typedef type name##_t
 120 #endif
 121 #else
 122 #define DISPATCH_ENUM(name, type, ...) \
 123                 enum { __VA_ARGS__ }; typedef type name##_t
 124 #endif
 125
 126 typedef void (*dispatch_function_t)(void *);
 127
 128 #endif