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utils: Introduce SWAP() helper to exchange two variables

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Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
This commit is contained in:
Kirill Tkhai
2017-06-28 18:54:07 +03:00
committed by Andrei Vagin
parent 4c68ed7d7e
commit d433a3e902
1 changed files with 7 additions and 0 deletions
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7
include/common/compiler.h
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@@ -85,6 +85,13 @@
type __max2 = (y); \ type __max2 = (y); \
__max1 > __max2 ? __max1: __max2; }) __max1 > __max2 ? __max1: __max2; })
#define SWAP(x, y) \
do { \
typeof(x) ____val = x; \
x = y; \
y = ____val; \
} while (0)
#define is_log2(v) (((v) & ((v) - 1)) == 0) #define is_log2(v) (((v) & ((v) - 1)) == 0)
#endif /* __CR_COMPILER_H__ */ #endif /* __CR_COMPILER_H__ */