Roc Toolkit internal modules
Roc Toolkit: real-time audio streaming
helpers.h
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1 /*
2  * Copyright (c) 2015 Roc authors
3  *
4  * This Source Code Form is subject to the terms of the Mozilla Public
5  * License, v. 2.0. If a copy of the MPL was not distributed with this
6  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
7  */
8 
9 //! @file roc_core/helpers.h
10 //! @brief Compile time helpers.
11 
12 #ifndef ROC_CORE_HELPERS_H_
13 #define ROC_CORE_HELPERS_H_
14 
15 //! Get number of elements in a static array.
16 #define ROC_ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
17 
18 //! Cast a member of a structure out to the containing structure.
19 #define ROC_CONTAINER_OF(ptr, type, member) \
20  (reinterpret_cast<type*>((char*)(ptr)-offsetof(type, member)))
21 
22 //! Stringize macro helper.
23 #define ROC_STRINGIZE_(s) #s
24 
25 //! Stringize macro.
26 #define ROC_STRINGIZE(s) ROC_STRINGIZE_(s)
27 
28 #endif // ROC_CORE_HELPERS_H_