mirror of
https://gitlab.nic.cz/labs/bird.git
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025525266f
The old timer interface is still kept, but implemented by new timers. The plan is to switch from the old inteface to the new interface, then clean it up.
178 lines
4.0 KiB
C
178 lines
4.0 KiB
C
/*
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* BIRD Library
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*
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* (c) 1998--2004 Martin Mares <mj@ucw.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#ifndef _BIRD_BIRDLIB_H_
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#define _BIRD_BIRDLIB_H_
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#include "lib/alloca.h"
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/* Ugly structure offset handling macros */
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struct align_probe { char x; long int y; };
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#define OFFSETOF(s, i) ((size_t) &((s *)0)->i)
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#define SKIP_BACK(s, i, p) ((s *)((char *)p - OFFSETOF(s, i)))
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#define BIRD_ALIGN(s, a) (((s)+a-1)&~(a-1))
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#define CPU_STRUCT_ALIGN (sizeof(struct align_probe))
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/* Utility macros */
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#define MIN_(a,b) (((a)<(b))?(a):(b))
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#define MAX_(a,b) (((a)>(b))?(a):(b))
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#ifndef PARSER
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#undef MIN
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#undef MAX
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#define MIN(a,b) MIN_(a,b)
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#define MAX(a,b) MAX_(a,b)
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#endif
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#define U64(c) UINT64_C(c)
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#define ABS(a) ((a)>=0 ? (a) : -(a))
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#define DELTA(a,b) (((a)>=(b))?(a)-(b):(b)-(a))
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#define ARRAY_SIZE(a) (sizeof(a)/sizeof(*(a)))
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#define BYTES(n) ((((uint) (n)) + 7) / 8)
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#define CALL(fn, args...) ({ if (fn) fn(args); })
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#define ADVANCE(w, r, l) ({ r -= l; w += l; })
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static inline int uint_cmp(uint i1, uint i2)
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{ return (int)(i1 > i2) - (int)(i1 < i2); }
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static inline int u64_cmp(u64 i1, u64 i2)
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{ return (int)(i1 > i2) - (int)(i1 < i2); }
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/* Bitfield macros */
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/* b is u32 array (or ptr), l is size of it in bits (multiple of 32), p is 0..(l-1) */
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#define BIT32_VAL(p) (((u32) 1) << ((p) % 32))
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#define BIT32_TEST(b,p) ((b)[(p)/32] & BIT32_VAL(p))
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#define BIT32_SET(b,p) ((b)[(p)/32] |= BIT32_VAL(p))
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#define BIT32_CLR(b,p) ((b)[(p)/32] &= ~BIT32_VAL(p))
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#define BIT32_ZERO(b,l) memset((b), 0, (l)/8)
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#ifndef NULL
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#define NULL ((void *) 0)
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#endif
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/* Macros for gcc attributes */
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#define NORET __attribute__((noreturn))
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#define UNUSED __attribute__((unused))
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#define PACKED __attribute__((packed))
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/* Microsecond time */
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typedef s64 btime;
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typedef s64 bird_clock_t;
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#define S_ *1000000
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#define MS_ *1000
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#define US_ *1
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#define TO_S /1000000
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#define TO_MS /1000
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#define TO_US /1
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#ifndef PARSER
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#define S S_
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#define MS MS_
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#define US US_
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#endif
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/* Rate limiting */
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struct tbf {
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bird_clock_t timestamp; /* Last update */
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u16 count; /* Available tokens */
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u16 burst; /* Max number of tokens */
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u16 rate; /* Rate of replenishment */
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u16 mark; /* Whether last op was limited */
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};
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/* Default TBF values for rate limiting log messages */
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#define TBF_DEFAULT_LOG_LIMITS { .rate = 1, .burst = 5 }
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void tbf_update(struct tbf *f);
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static inline int
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tbf_limit(struct tbf *f)
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{
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tbf_update(f);
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if (!f->count)
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{
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f->mark = 1;
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return 1;
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}
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f->count--;
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f->mark = 0;
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return 0;
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}
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/* Logging and dying */
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typedef struct buffer {
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byte *start;
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byte *pos;
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byte *end;
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} buffer;
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#define STACK_BUFFER_INIT(buf,size) \
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do { \
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buf.start = alloca(size); \
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buf.pos = buf.start; \
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buf.end = buf.start + size; \
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} while(0)
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#define LOG_BUFFER_INIT(buf) \
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STACK_BUFFER_INIT(buf, LOG_BUFFER_SIZE)
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#define LOG_BUFFER_SIZE 1024
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#define log log_msg
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void log_commit(int class, buffer *buf);
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void log_msg(const char *msg, ...);
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void log_rl(struct tbf *rl, const char *msg, ...);
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void die(const char *msg, ...) NORET;
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void bug(const char *msg, ...) NORET;
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#define L_DEBUG "\001" /* Debugging messages */
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#define L_TRACE "\002" /* Protocol tracing */
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#define L_INFO "\003" /* Informational messages */
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#define L_REMOTE "\004" /* Remote protocol errors */
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#define L_WARN "\005" /* Local warnings */
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#define L_ERR "\006" /* Local errors */
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#define L_AUTH "\007" /* Authorization failed etc. */
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#define L_FATAL "\010" /* Fatal errors */
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#define L_BUG "\011" /* BIRD bugs */
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void debug(const char *msg, ...); /* Printf to debug output */
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/* Debugging */
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#if defined(LOCAL_DEBUG) || defined(GLOBAL_DEBUG)
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#define DBG(x, y...) debug(x, ##y)
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#else
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#define DBG(x, y...) do { } while(0)
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#endif
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#ifdef DEBUGGING
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#define ASSERT(x) do { if (!(x)) bug("Assertion `%s' failed at %s:%d", #x, __FILE__, __LINE__); } while(0)
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#else
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#define ASSERT(x) do { } while(0)
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#endif
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/* Pseudorandom numbers */
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u32 random_u32(void);
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#endif
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