/*

 * Copyright (C) 2017 Red Hat, Inc.

 *

 * Author: Nikos Mavrogiannopoulos

 *

 * This file is part of GnuTLS.

 *

 * The GnuTLS 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 2.1 of

 * the License, or (at your option) any later version.

 *

 * This 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 <https://www.gnu.org/licenses/>

 *

 */

#ifndef GNUTLS_LIB_ATOMIC_H

#define GNUTLS_LIB_ATOMIC_H

#ifdef HAVE_STDATOMIC_H

# include <stdatomic.h>

# define gnutls_atomic_uint_t atomic_uint

# define DEF_ATOMIC_INT(x) atomic_uint x

# define gnutls_atomic_increment(x) (*x)++

# define gnutls_atomic_decrement(x) (*x)--

# define gnutls_atomic_init(x) (*x)=(0)

# define gnutls_atomic_deinit(x)

# define gnutls_atomic_val(x) (*x)

#else

# include "locks.h"

struct gnutls_atomic_uint_st {

	void *lock;

	unsigned int value;

};

typedef struct gnutls_atomic_uint_st *gnutls_atomic_uint_t;

# define DEF_ATOMIC_INT(x) struct gnutls_atomic_uint_st x

inline static unsigned gnutls_atomic_val(gnutls_atomic_uint_t x)

{

	unsigned int t;

	gnutls_mutex_lock(&x->lock);

	t = x->value;

	gnutls_mutex_unlock(&x->lock);

	return t;

}

inline static void gnutls_atomic_increment(gnutls_atomic_uint_t x)

{

	gnutls_mutex_lock(&x->lock);

	x->value++;

	gnutls_mutex_unlock(&x->lock);

}

inline static void gnutls_atomic_decrement(gnutls_atomic_uint_t x)

{

	gnutls_mutex_lock(&x->lock);

	x->value--;

	gnutls_mutex_unlock(&x->lock);

}

inline static void gnutls_atomic_init(gnutls_atomic_uint_t x)

{

	gnutls_mutex_init(&x->lock);

	x->value = 0;

}

inline static void gnutls_atomic_deinit(gnutls_atomic_uint_t x)

{

	gnutls_mutex_deinit(&x->lock);

}

#endif

#endif /* GNUTLS_LIB_ATOMIC_H */