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1 /*
2  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without modification,
6  * are permitted provided that the following conditions are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright notice,
9  *    this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright notice,
11  *    this list of conditions and the following disclaimer in the documentation
12  *    and/or other materials provided with the distribution.
13  * 3. The name of the author may not be used to endorse or promote products
14  *    derived from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
19  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
21  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
25  * OF SUCH DAMAGE.
26  *
27  * This file is part of the lwIP TCP/IP stack.
28  *
29  * Author: Adam Dunkels <adam@sics.se>
30  *
31  */
32 #ifndef __LWIP_DEBUG_H__
33 #define __LWIP_DEBUG_H__
34 
35 #include "lwip/arch.h"
36 
37 /** lower two bits indicate debug level
38  * - 0 all
39  * - 1 warning
40  * - 2 serious
41  * - 3 severe
42  */
43 #define LWIP_DBG_LEVEL_ALL     0x00
44 #define LWIP_DBG_LEVEL_OFF     LWIP_DBG_LEVEL_ALL /* compatibility define only */
45 #define LWIP_DBG_LEVEL_WARNING 0x01 /* bad checksums, dropped packets, ... */
46 #define LWIP_DBG_LEVEL_SERIOUS 0x02 /* memory allocation failures, ... */
47 #define LWIP_DBG_LEVEL_SEVERE  0x03
48 #define LWIP_DBG_MASK_LEVEL    0x03
49 
50 /** flag for LWIP_DEBUGF to enable that debug message */
51 #define LWIP_DBG_ON            0x80U
52 /** flag for LWIP_DEBUGF to disable that debug message */
53 #define LWIP_DBG_OFF           0x00U
54 
55 /** flag for LWIP_DEBUGF indicating a tracing message (to follow program flow) */
56 #define LWIP_DBG_TRACE         0x40U
57 /** flag for LWIP_DEBUGF indicating a state debug message (to follow module states) */
58 #define LWIP_DBG_STATE         0x20U
59 /** flag for LWIP_DEBUGF indicating newly added code, not thoroughly tested yet */
60 #define LWIP_DBG_FRESH         0x10U
61 /** flag for LWIP_DEBUGF to halt after printing this debug message */
62 #define LWIP_DBG_HALT          0x08U
63 
64 #ifndef LWIP_NOASSERT
65 #define LWIP_ASSERT(message, assertion) do { if(!(assertion)) \
66   LWIP_PLATFORM_ASSERT(message); } while(0)
67 #else  /* LWIP_NOASSERT */
68 #define LWIP_ASSERT(message, assertion)
69 #endif /* LWIP_NOASSERT */
70 
71 /** if "expression" isn't true, then print "message" and execute "handler" expression */
72 #ifndef LWIP_ERROR
73 #define LWIP_ERROR(message, expression, handler) do { if (!(expression)) { \
74   LWIP_PLATFORM_ASSERT(message); handler;}} while(0)
75 #endif /* LWIP_ERROR */
76 
77 #ifdef LWIP_DEBUG
78 /** print debug message only if debug message type is enabled...
79  *  AND is of correct type AND is at least LWIP_DBG_LEVEL
80  */
81 #define LWIP_DEBUGF(debug, message) do { \
82                                if ( \
83                                    ((debug) & LWIP_DBG_ON) && \
84                                    ((debug) & LWIP_DBG_TYPES_ON) && \
85                                    ((s16_t)((debug) & LWIP_DBG_MASK_LEVEL) >= LWIP_DBG_MIN_LEVEL)) { \
86                                  LWIP_PLATFORM_DIAG(message); \
87                                  if ((debug) & LWIP_DBG_HALT) { \
88                                    while(1); \
89                                  } \
90                                } \
91                              } while(0)
92 
93 #else  /* LWIP_DEBUG */
94 #define LWIP_DEBUGF(debug, message)
95 #endif /* LWIP_DEBUG */
96 
97 #endif /* __LWIP_DEBUG_H__ */
98 
99