/****************************************************************************
 *
 *   Copyright (c) 2023 PX4 Development Team. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name PX4 nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
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#include "atomic_transaction.h"

#ifdef __PX4_POSIX
static pthread_mutex_t _param_mutex;
static pthread_once_t _param_mutex_once = PTHREAD_ONCE_INIT;

static void _init_param_mutex()
{
	pthread_mutexattr_t attr;
	pthread_mutexattr_init(&attr);
	pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
	pthread_mutex_init(&_param_mutex, &attr);
	pthread_mutexattr_destroy(&attr);
}

pthread_mutex_t *AtomicTransaction::_get_mutex()
{
	pthread_once(&_param_mutex_once, _init_param_mutex);
	return &_param_mutex;
}
#endif