bird/lib/buffer.h
Ondrej Zajicek (work) 7126cadf80 Static: Minor overhaul
The patch fixes several bugs introduced in previous changes, simplifies
the protocol by handing routes uniformly, introduces asynchronous route
processing to avoid issues with separate notifications for each next-hop
in ECMP routes, and makes reconfiguration faster by avoiding quadratic
complexity.
2017-03-09 13:47:00 +01:00

59 lines
1.5 KiB
C

/*
* BIRD Library -- Generic Buffer Structure
*
* (c) 2013 Ondrej Zajicek <santiago@crfreenet.org>
* (c) 2013 CZ.NIC z.s.p.o.
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_BUFFER_H_
#define _BIRD_BUFFER_H_
#include "lib/resource.h"
#include "sysdep/config.h"
#define BUFFER(type) struct { type *data; uint used, size; }
#define BUFFER_TYPE(v) typeof(* (v).data)
#define BUFFER_SIZE(v) ((v).size * sizeof(* (v).data))
#define BUFFER_INIT(v,pool,isize) \
({ \
(v).used = 0; \
(v).size = (isize); \
(v).data = mb_alloc(pool, BUFFER_SIZE(v)); \
})
#define BUFFER_SET(v,nsize) \
({ \
(v).used = (nsize); \
if ((v).used > (v).size) \
buffer_realloc((void **) &((v).data), &((v).size), (v).used, sizeof(* (v).data)); \
})
#define BUFFER_INC(v,step) \
({ \
uint _o = (v).used; \
BUFFER_SET(v, (v).used + (step)); \
(v).data + _o; \
})
#define BUFFER_DEC(v,step) ({ (v).used -= (step); })
#define BUFFER_PUSH(v) (*BUFFER_INC(v,1))
#define BUFFER_POP(v) BUFFER_DEC(v,1)
#define BUFFER_FLUSH(v) ({ (v).used = 0; })
#define BUFFER_WALK(v,n) \
for (BUFFER_TYPE(v) *_n = (v).data, n; _n < ((v).data + (v).used) && (n = *_n, 1); _n++)
#define BUFFER_SHALLOW_COPY(dst, src) \
({ \
(dst).used = (src).used; \
(dst).size = (src).size; \
(dst).data = (src).data; \
})
#endif /* _BIRD_BUFFER_H_ */