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/* Copyright (C) 2009 The Android Open Source Project
**
** This software is licensed under the terms of the GNU General Public
** License version 2, as published by the Free Software Foundation, and
** may be copied, distributed, and modified under those terms.
**
** 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.
*/
#ifndef _ANDROID_UTILS_REFSET_H
#define _ANDROID_UTILS_REFSET_H
#include <android/utils/vector.h>
/* this implements a set of addresses in memory.
* NULL cannot be stored in the set.
*/
typedef struct {
AVECTOR_DECL(void*,buckets);
int iteration;
} ARefSet;
AINLINED void
arefSet_init( ARefSet* s )
{
AVECTOR_INIT(s,buckets);
}
AINLINED void
arefSet_done( ARefSet* s )
{
AVECTOR_DONE(s,buckets);
}
AINLINED void
arefSet_clear( ARefSet* s )
{
AVECTOR_CLEAR(s,buckets);
s->iteration = 0;
}
AINLINED int
arefSet_count( ARefSet* s )
{
return (int) AVECTOR_SIZE(s,buckets);
}
extern ABool arefSet_has( ARefSet* s, void* item );
extern void arefSet_add( ARefSet* s, void* item );
extern void arefSet_del( ARefSet* s, void* item );
extern void _arefSet_removeDeferred( ARefSet* s );
#define AREFSET_DELETED ((void*)~(size_t)0)
#define AREFSET_FOREACH(_set,_item,_statement) \
do { \
int __refset_nn = 0; \
int __refset_max = (_set)->max_buckets; \
(_set)->iteration += 2; \
for ( ; __refset_nn < __refset_max; __refset_nn++ ) { \
void* __refset_item = (_set)->buckets[__refset_nn]; \
if (__refset_item == NULL || __refset_item == AREFSET_DELETED) \
continue; \
_item = __refset_item; \
_statement; \
} \
(_set)->iteration -= 2; \
if ((_set)->iteration == 1) \
_arefSet_removeDeferred(_set); \
} while (0)
#endif /* _ANDROID_UTILS_REFSET_H */
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