debug.h

LWIP1.1.1在UCOS-II2.61上的移植

#ifndef __LWIP_DEBUG_H__
#define __LWIP_DEBUG_H__

#include "arch/cc.h"

#include "lwip/opt.h"/*add by sun */ 


/** lower two bits indicate debug level
 * - 0 off
 * - 1 warning
 * - 2 serious
 * - 3 severe
 */

#define DBG_LEVEL_OFF     0        /*关闭打印*/ 
#define DBG_LEVEL_WARNING 1  /* bad checksums, dropped packets, ... */
#define DBG_LEVEL_SERIOUS 2  /* memory allocation failures, ... */
#define DBG_LEVEL_SEVERE  3  /*非常恶劣地 */ 
#define DBG_MASK_LEVEL    3

/** flag for LWIP_DEBUGF to enable that debug message */
#define DBG_ON  0x80U
/** flag for LWIP_DEBUGF to disable that debug message */
#define DBG_OFF 0x00U

/** flag for LWIP_DEBUGF indicating a tracing message (to follow program flow) */
#define DBG_TRACE   0x40U
/** flag for LWIP_DEBUGF indicating a state debug message (to follow module states) */
#define DBG_STATE   0x20U
/** flag for LWIP_DEBUGF indicating newly added code, not thoroughly tested yet */
#define DBG_FRESH   0x10U
/** flag for LWIP_DEBUGF to halt after printing this debug message */
#define DBG_HALT    0x08U

/*如果y为0时，assert先向标准错误流steerr写错误信息，然后使程序非正常中止 */ 
#ifndef LWIP_NOASSERT 
#define LWIP_ASSERT(x,y) do { if(!(y)) LWIP_PLATFORM_ASSERT(x); } while(0)
#else
#define LWIP_ASSERT(x,y) 
#endif

#ifdef LWIP_DEBUG
/** print debug message only if debug message type is enabled...
 *  AND is of correct type AND is at least DBG_LEVEL
 */
#define LWIP_DEBUGF(debug,x)  do { if (((debug) & DBG_ON) && ((debug) & DBG_TYPES_ON) && ((s16_t)((debug) & DBG_MASK_LEVEL) >= DBG_MIN_LEVEL)) { LWIP_PLATFORM_DIAG(x); if ((debug) & DBG_HALT) while(1); } } while(0)
#define LWIP_ERROR(x)   do { LWIP_PLATFORM_DIAG(x); } while(0)  
#else /* LWIP_DEBUG */
#define LWIP_DEBUGF(debug,x) 
#define LWIP_ERROR(x)  
#endif /* LWIP_DEBUG */

#endif /* __LWIP_DEBUG_H__ */