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/*************************************************************************
* Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library is free software; you can redistribute it and/ *
* or modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Library 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
/*
* Simple thread-safe generalized arrays, for returning variable-length arrays
* from functions, and other fun stuff.
*/
#ifndef DIMENSION_ARRAY_H
#define DIMENSION_ARRAY_H
#include <pthread.h> /* For pthread_rwlock_t */
#include <stdlib.h> /* For size_t */
typedef struct {
void *ptr;
size_t obj_size, length, capacity;
/* Synchronicity control (pointer so it's not const) */
pthread_rwlock_t *rwlock;
} dmnsn_array;
/* Array allocation never returns NULL - if dmnsn_new_array returns, it
succeeded */
dmnsn_array *dmnsn_new_array(size_t obj_size);
void dmnsn_delete_array(dmnsn_array *array);
/* Thread-safe atomic array access */
void dmnsn_array_push(dmnsn_array *array, const void *obj);
void dmnsn_array_pop(dmnsn_array *array, void *obj);
void dmnsn_array_get(const dmnsn_array *array, size_t i, void *obj);
void dmnsn_array_set(dmnsn_array *array, size_t i, const void *obj);
size_t dmnsn_array_size(const dmnsn_array *array);
void dmnsn_array_resize(dmnsn_array *array, size_t length);
/* Non-atomic operations for manual locking */
void *dmnsn_array_at(dmnsn_array *array, size_t i);
size_t dmnsn_array_size_unlocked(const dmnsn_array *array);
void dmnsn_array_resize_unlocked(dmnsn_array *array, size_t length);
/* Manual locking */
void dmnsn_array_rdlock(const dmnsn_array *array);
void dmnsn_array_wrlock(dmnsn_array *array);
void dmnsn_array_unlock(const dmnsn_array *array);
#endif /* DIMENSION_ARRAY_H */
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