/usr/include/guacamole/pool.h is in libguac-dev 0.8.3-1.
This file is owned by root:root, with mode 0o644.
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is libguac.
*
* The Initial Developer of the Original Code is
* Michael Jumper.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef _GUAC_POOL_H
#define _GUAC_POOL_H
/**
* Provides functions and structures for maintaining dynamically allocated and
* freed pools of integers.
*
* @file pool.h
*/
typedef struct guac_pool_int guac_pool_int;
/**
* A pool of integers. Integers can be removed from and later free'd back
* into the pool. New integers are returned when the pool is exhausted,
* or when the pool has not met some minimum size. Old, free'd integers
* are returned otherwise.
*/
typedef struct guac_pool {
/**
* The minimum number of integers which must have been returned by
* guac_pool_next_int before previously-used and freed integers are
* allowed to be returned.
*/
int min_size;
/**
* The next integer to be released (after no more integers remain in the
* pool.
*/
int __next_value;
/**
* The first integer in the pool, if any.
*/
guac_pool_int* __head;
/**
* The last integer in the pool, if any.
*/
guac_pool_int* __tail;
} guac_pool;
/**
* Represents a single integer within a larger pool of integers.
*/
struct guac_pool_int {
/**
* The integer value of this pool entry.
*/
int value;
/**
* The next available (unused) guac_pool_int in the list of
* allocated but free'd ints.
*/
guac_pool_int* __next;
};
/**
* Allocates a new guac_pool having the given minimum size.
*
* @param size The minimum number of integers which must have been returned by
* guac_pool_next_int before freed integers (previously used integers)
* are allowed to be returned.
* @return A new, empty guac_pool, having the given minimum size.
*/
guac_pool* guac_pool_alloc(int size);
/**
* Frees the given guac_pool.
*
* @param pool The guac_pool to free.
*/
void guac_pool_free(guac_pool* pool);
/**
* Returns the next available integer from the given guac_pool. All integers returned are
* non-negative, and are returned in sequences, starting from 0.
*
* @param pool The guac_pool to retrieve an integer from.
* @return The next available integer, which may be either an integer not yet returned
* by a call to guac_pool_next_int, or an integer which was previosly returned,
* but has since been freed.
*/
int guac_pool_next_int(guac_pool* pool);
/**
* Frees the given integer back into the given guac_pool. The integer given will be
* available for future calls to guac_pool_next_int.
*
* @param pool The guac_pool to free the given integer into.
* @param value The integer which should be readded to the given pool, such that it can
* be received by a future call to guac_pool_next_int.
*/
void guac_pool_free_int(guac_pool* pool, int value);
#endif
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