Annotation of embedaddon/bird2/lib/birdlib.h, revision 1.1.1.1
1.1 misho 1: /*
2: * BIRD Library
3: *
4: * (c) 1998--2004 Martin Mares <mj@ucw.cz>
5: *
6: * Can be freely distributed and used under the terms of the GNU GPL.
7: */
8:
9: #ifndef _BIRD_BIRDLIB_H_
10: #define _BIRD_BIRDLIB_H_
11:
12: #include "lib/alloca.h"
13:
14: /* Ugly structure offset handling macros */
15:
16: struct align_probe { char x; long int y; };
17:
18: #define OFFSETOF(s, i) ((size_t) &((s *)0)->i)
19: #define SKIP_BACK(s, i, p) ((s *)((char *)p - OFFSETOF(s, i)))
20: #define BIRD_ALIGN(s, a) (((s)+a-1)&~(a-1))
21: #define CPU_STRUCT_ALIGN (sizeof(struct align_probe))
22:
23: /* Utility macros */
24:
25: #define MIN_(a,b) (((a)<(b))?(a):(b))
26: #define MAX_(a,b) (((a)>(b))?(a):(b))
27:
28: #ifndef PARSER
29: #undef MIN
30: #undef MAX
31: #define MIN(a,b) MIN_(a,b)
32: #define MAX(a,b) MAX_(a,b)
33: #endif
34:
35: #define U64(c) UINT64_C(c)
36: #define ABS(a) ((a)>=0 ? (a) : -(a))
37: #define DELTA(a,b) (((a)>=(b))?(a)-(b):(b)-(a))
38: #define ARRAY_SIZE(a) (sizeof(a)/sizeof(*(a)))
39: #define BYTES(n) ((((uint) (n)) + 7) / 8)
40: #define CALL(fn, args...) ({ if (fn) fn(args); })
41: #define ADVANCE(w, r, l) ({ r -= (l); w += (l); })
42:
43: static inline int uint_cmp(uint i1, uint i2)
44: { return (int)(i1 > i2) - (int)(i1 < i2); }
45:
46: static inline int u64_cmp(u64 i1, u64 i2)
47: { return (int)(i1 > i2) - (int)(i1 < i2); }
48:
49:
50: /* Bitfield macros */
51:
52: /* b is u32 array (or ptr), l is size of it in bits (multiple of 32), p is 0..(l-1) */
53: #define BIT32_VAL(p) (((u32) 1) << ((p) % 32))
54: #define BIT32_TEST(b,p) ((b)[(p)/32] & BIT32_VAL(p))
55: #define BIT32_SET(b,p) ((b)[(p)/32] |= BIT32_VAL(p))
56: #define BIT32_CLR(b,p) ((b)[(p)/32] &= ~BIT32_VAL(p))
57: #define BIT32_ZERO(b,l) memset((b), 0, (l)/8)
58:
59: /* The same, but counting bits from MSB */
60: #define BIT32R_VAL(p) ((((u32) 1) << 31) >> ((p) % 32))
61: #define BIT32R_TEST(b,p) ((b)[(p)/32] & BIT32R_VAL(p))
62: #define BIT32R_SET(b,p) ((b)[(p)/32] |= BIT32R_VAL(p))
63: #define BIT32R_CLR(b,p) ((b)[(p)/32] &= ~BIT32R_VAL(p))
64: #define BIT32R_ZERO(b,l) memset((b), 0, (l)/8)
65:
66: #ifndef NULL
67: #define NULL ((void *) 0)
68: #endif
69:
70: /* Macros for gcc attributes */
71:
72: #define NORET __attribute__((noreturn))
73: #define UNUSED __attribute__((unused))
74: #define PACKED __attribute__((packed))
75:
76: #ifndef HAVE_THREAD_LOCAL
77: #define _Thread_local
78: #endif
79:
80: /* Microsecond time */
81:
82: typedef s64 btime;
83: //typedef s64 bird_clock_t;
84:
85: #define S_ * (btime) 1000000
86: #define MS_ * (btime) 1000
87: #define US_ * (btime) 1
88: #define TO_S /1000000
89: #define TO_MS /1000
90: #define TO_US /1
91:
92: #ifndef PARSER
93: #define S S_
94: #define MS MS_
95: #define US US_
96: #define NS /1000
97: #endif
98:
99: #define TIME_INFINITY ((s64) 0x7fffffffffffffff)
100:
101:
102: /* Rate limiting */
103:
104: struct tbf {
105: btime timestamp; /* Last update */
106: u64 count; /* Available micro-tokens */
107: u16 burst; /* Max number of tokens */
108: u16 rate; /* Rate of replenishment (tokens / sec) */
109: u32 drop; /* Number of failed request since last successful */
110: };
111:
112: /* Default TBF values for rate limiting log messages */
113: #define TBF_DEFAULT_LOG_LIMITS { .rate = 1, .burst = 5 }
114:
115: int tbf_limit(struct tbf *f);
116:
117:
118: /* Logging and dying */
119:
120: typedef struct buffer {
121: byte *start;
122: byte *pos;
123: byte *end;
124: } buffer;
125:
126: #define STACK_BUFFER_INIT(buf,size) \
127: do { \
128: buf.start = alloca(size); \
129: buf.pos = buf.start; \
130: buf.end = buf.start + size; \
131: } while(0)
132:
133: #define LOG_BUFFER_INIT(buf) \
134: STACK_BUFFER_INIT(buf, LOG_BUFFER_SIZE)
135:
136: #define LOG_BUFFER_SIZE 1024
137:
138: #define log log_msg
139: void log_commit(int class, buffer *buf);
140: void log_msg(const char *msg, ...);
141: void log_rl(struct tbf *rl, const char *msg, ...);
142: void die(const char *msg, ...) NORET;
143: void bug(const char *msg, ...) NORET;
144:
145: #define L_DEBUG "\001" /* Debugging messages */
146: #define L_TRACE "\002" /* Protocol tracing */
147: #define L_INFO "\003" /* Informational messages */
148: #define L_REMOTE "\004" /* Remote protocol errors */
149: #define L_WARN "\005" /* Local warnings */
150: #define L_ERR "\006" /* Local errors */
151: #define L_AUTH "\007" /* Authorization failed etc. */
152: #define L_FATAL "\010" /* Fatal errors */
153: #define L_BUG "\011" /* BIRD bugs */
154:
155: void debug(const char *msg, ...); /* Printf to debug output */
156:
157: /* Debugging */
158:
159: #if defined(LOCAL_DEBUG) || defined(GLOBAL_DEBUG)
160: #define DBG(x, y...) debug(x, ##y)
161: #else
162: #define DBG(x, y...) do { } while(0)
163: #endif
164:
165: #ifdef DEBUGGING
166: #define ASSERT(x) do { if (!(x)) bug("Assertion '%s' failed at %s:%d", #x, __FILE__, __LINE__); } while(0)
167: #else
168: #define ASSERT(x) do { if (!(x)) log(L_BUG "Assertion '%s' failed at %s:%d", #x, __FILE__, __LINE__); } while(0)
169: #endif
170:
171: #ifdef DEBUGGING
172: asm(
173: ".pushsection \".debug_gdb_scripts\", \"MS\",@progbits,1\n"
174: ".byte 1\n" /* Python */
175: ".asciz \"bird-gdb.py\"\n"
176: ".popsection\n"
177: );
178: #endif
179:
180: /* Pseudorandom numbers */
181:
182: u32 random_u32(void);
183:
184: #endif
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to birdlib.h CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / bird2 / lib