rcutils  master
C API providing common utilities and data structures.
macros.h
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1 // Copyright 2017 Open Source Robotics Foundation, Inc.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #ifndef RCUTILS__MACROS_H_
16 #define RCUTILS__MACROS_H_
17 
18 #ifdef __cplusplus
19 extern "C"
20 {
21 #endif
22 
23 #ifndef _WIN32
24 #define RCUTILS_WARN_UNUSED __attribute__((warn_unused_result))
25 #else
26 #define RCUTILS_WARN_UNUSED _Check_return_
27 #endif
28 
29 // Note: this block was migrated from rmw/macros.h
30 // This block either sets RCUTILS_THREAD_LOCAL or RCUTILS_THREAD_LOCAL_PTHREAD.
31 #if defined _WIN32 || defined __CYGWIN__
32 // Windows or Cygwin
33  #define RCUTILS_THREAD_LOCAL __declspec(thread)
34 #elif defined __APPLE__
35 // Apple OS's
36  #include <TargetConditionals.h>
37  #if TARGET_IPHONE_SIMULATOR || TARGET_OS_IPHONE
38 // iOS Simulator or iOS device
39  #include <Availability.h>
40  #if defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
41  #if __IPHONE_OS_VERSION_MAX_ALLOWED >= 100000
42 // iOS >= 10, thread local storage was added in iOS 10
43  #define RCUTILS_THREAD_LOCAL _Thread_local
44  #else
45 // iOS < 10, no thread local storage, so use pthread instead
46  #define RCUTILS_THREAD_LOCAL_PTHREAD 1
47  #undef RCUTILS_THREAD_LOCAL
48  #endif
49  #else
50  #error "Unknown iOS version"
51  #endif
52  #elif TARGET_OS_MAC
53 // macOS
54  #define RCUTILS_THREAD_LOCAL _Thread_local
55  #else
56  #error "Unknown Apple platform"
57  #endif
58 #else
59 // Some other non-Windows, non-cygwin, non-apple OS
60  #define RCUTILS_THREAD_LOCAL _Thread_local
61 #endif
62 
63 #define RCUTILS_STRINGIFY_IMPL(x) #x
64 #define RCUTILS_STRINGIFY(x) RCUTILS_STRINGIFY_IMPL(x)
65 
66 #ifdef __cplusplus
67 }
68 #endif
69 
70 #endif // RCUTILS__MACROS_H_