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#pragma once
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 St, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* $Id$
*
* @file atomic_queue.h
* @brief Thread-safe queues.
*
* @copyright 2016 Alan DeKok (aland@freeradius.org)
*/
RCSIDH(atomic_queue_h, "$Id$")
#ifdef HAVE_WDOCUMENTATION
DIAG_OFF(documentation)
#endif
#include <talloc.h>
#ifdef HAVE_WDOCUMENTATION
DIAG_ON(documentation)
#endif
#include <stdbool.h>
#ifdef HAVE_STDATOMIC_H
# include <stdatomic.h>
#else
# include <freeradius-devel/stdatomic.h>
#endif
/*
* Some macros to make our life easier.
*/
#define atomic_int64_t _Atomic(int64_t)
#define atomic_uint32_t _Atomic(uint32_t)
#define atomic_uint64_t _Atomic(uint64_t)
#define cas_incr(_store, _var) atomic_compare_exchange_strong_explicit(&_store, &_var, _var + 1, memory_order_release, memory_order_relaxed)
#define cas_decr(_store, _var) atomic_compare_exchange_strong_explicit(&_store, &_var, _var - 1, memory_order_release, memory_order_relaxed)
#define load(_var) atomic_load_explicit(&_var, memory_order_relaxed)
#define aquire(_var) atomic_load_explicit(&_var, memory_order_acquire)
#define store(_store, _var) atomic_store_explicit(&_store, _var, memory_order_release);
#ifdef __cplusplus
extern "C" {
#endif
typedef struct fr_atomic_queue_s fr_atomic_queue_t;
fr_atomic_queue_t *fr_atomic_queue_alloc(TALLOC_CTX *ctx, size_t size);
void fr_atomic_queue_free(fr_atomic_queue_t **aq);
bool fr_atomic_queue_push(fr_atomic_queue_t *aq, void *data);
bool fr_atomic_queue_pop(fr_atomic_queue_t *aq, void **p_data);
size_t fr_atomic_queue_size(fr_atomic_queue_t *aq);
#ifdef WITH_VERIFY_PTR
void fr_atomic_queue_verify(fr_atomic_queue_t *aq);
#endif
#ifndef NDEBUG
void fr_atomic_queue_debug(fr_atomic_queue_t *aq, FILE *fp);
#endif
#ifdef __cplusplus
}
#endif
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