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lib: Add swap() macro

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swap() will swap its two arguments while keeping the required
tmp variable hidden. Makes for neater code.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
This commit is contained in:
Ville Syrjälä 2014-11-28 10:03:38 +02:00
parent b32b5327a2
commit 1658edceee
1 changed files with 6 additions and 0 deletions
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6
lib/igt_aux.h
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@ -90,4 +90,10 @@ void intel_require_memory(uint32_t count, uint32_t size, unsigned mode);
#define min(a, b) ((a) < (b) ? (a) : (b)) #define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b)) #define max(a, b) ((a) > (b) ? (a) : (b))
#define swap(a, b) do { \
typeof(a) _tmp = (a); \
(a) = (b); \
(b) = _tmp; \
} while (0)
#endif /* IGT_AUX_H */ #endif /* IGT_AUX_H */