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def.h: added LWIP_ARRAYSIZE() macro

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goldsimon 2015-10-02 10:05:32 +02:00
parent 180ed573a5
commit 424bd7e38c
1 changed files with 3 additions and 0 deletions
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3
src/include/lwip/def.h
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@ -49,6 +49,9 @@ extern "C" {
#define LWIP_MAX(x , y) (((x) > (y)) ? (x) : (y))
#define LWIP_MIN(x , y) (((x) < (y)) ? (x) : (y))
/* Get the number of entries in an array ('x' must NOT be a pointer!) */
#define LWIP_ARRAYSIZE(x) (sizeof(x)/sizeof((x)[0]))
#ifndef NULL
#define NULL ((void *)0)
#endif