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/*
* Pool for shared strings.
*
* Copyright (c) 2010 Marko Kreen, Skype Technologies OÜ
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/**
* @file
*
* Storage for shared strings.
*
* This provides refcounted searchable string pool for cases
* where lot of objects reference same strings.
*/
#ifndef _USUAL_STRPOOL_H_
#define _USUAL_STRPOOL_H_
#include <usual/cxalloc.h>
/** Handle for the pool */
struct StrPool;
/** Pooled String */
struct PStr {
/** Parent pool */
struct StrPool *pool;
/** String length */
size_t len;
/** Reference count */
int refcnt;
/** Zero-terminated value */
char str[FLEX_ARRAY];
};
/** Create new pool */
struct StrPool *strpool_create(CxMem *ca);
/** Release pool */
void strpool_free(struct StrPool *sp);
/** Return either existing or new PStr for given value */
struct PStr *strpool_get(struct StrPool *sp, const char *str, ssize_t len);
/** Increase reference count for existing PStr */
void strpool_incref(struct PStr *str);
/** Decrease reference count for existing PStr */
void strpool_decref(struct PStr *str);
/** Return count of strings in the pool */
int strpool_total(struct StrPool *sp);
#endif
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