[lwip-users] LWIP_DEBUGF

[Bernhard 'Gustl' Bauer]

Hi,

I just had a look at the define of LWIP_DEBUGF. I wonder whats the use 
of the do {} while(0) statement. Its contens is executed one time, so 
the loop can be omitted, isn't it?

Gustl

#define LWIP_DEBUGF(debug,x) do { \
  if ( \
    ((debug) & LWIP_DBG_ON) && \
    ((debug) & LWIP_DBG_TYPES_ON) && \
    ((s16_t)((debug) & LWIP_DBG_MASK_LEVEL) >= LWIP_DBG_MIN_LEVEL)) { \
    LWIP_PLATFORM_DIAG(x); \
    if ((debug) & LWIP_DBG_HALT) { \
      while(1); \
    } \
  } \
} while(0)