[deliverable/linux.git] / net / batman-adv / bitarray.h

/*
 * Copyright (C) 2006-2012 B.A.T.M.A.N. contributors:
 *
 * Simon Wunderlich, Marek Lindner
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA
 *
 */

#ifndef _NET_BATMAN_ADV_BITARRAY_H_
#define _NET_BATMAN_ADV_BITARRAY_H_

#define WORD_BIT_SIZE (sizeof(unsigned long) * 8)

/* returns true if the corresponding bit in the given seq_bits indicates true
 * and curr_seqno is within range of last_seqno */
int get_bit_status(const unsigned long *seq_bits, uint32_t last_seqno,
		   uint32_t curr_seqno);

/* turn corresponding bit on, so we can remember that we got the packet */
void bit_mark(unsigned long *seq_bits, int32_t n);


/* receive and process one packet, returns 1 if received seq_num is considered
 * new, 0 if old  */
int bit_get_packet(void *priv, unsigned long *seq_bits,
		   int32_t seq_num_diff, int set_mark);

/* count the hamming weight, how many good packets did we receive? */
int bit_packet_count(const unsigned long *seq_bits);

#endif /* _NET_BATMAN_ADV_BITARRAY_H_ */
Commit	Line	Data
c6c8fea2	1	/*
567db7b0	2	* Copyright (C) 2006-2012 B.A.T.M.A.N. contributors:
c6c8fea2 SE	3	*
	4	* Simon Wunderlich, Marek Lindner
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of version 2 of the GNU General Public
	8	* License as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	18	* 02110-1301, USA
	19	*
	20	*/
	21
	22	#ifndef _NET_BATMAN_ADV_BITARRAY_H_
	23	#define _NET_BATMAN_ADV_BITARRAY_H_
	24
	25	#define WORD_BIT_SIZE (sizeof(unsigned long) * 8)
	26
	27	/* returns true if the corresponding bit in the given seq_bits indicates true
	28	* and curr_seqno is within range of last_seqno */
b2c44a53 DH	29	int get_bit_status(const unsigned long *seq_bits, uint32_t last_seqno,
b2c44a53 DH	30	uint32_t curr_seqno);
c6c8fea2 SE	31
	32	/* turn corresponding bit on, so we can remember that we got the packet */
	33	void bit_mark(unsigned long *seq_bits, int32_t n);
	34
	35
	36	/* receive and process one packet, returns 1 if received seq_num is considered
	37	* new, 0 if old */
b4e17054 SE	38	int bit_get_packet(void priv, unsigned long seq_bits,
b4e17054 SE	39	int32_t seq_num_diff, int set_mark);
c6c8fea2 SE	40
c6c8fea2 SE	41	/* count the hamming weight, how many good packets did we receive? */
747e4221	42	int bit_packet_count(const unsigned long *seq_bits);
c6c8fea2 SE	43
c6c8fea2 SE	44	#endif /* _NET_BATMAN_ADV_BITARRAY_H_ */