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#ifndef FR_THREADS_H
#define FR_THREADS_H
/*
* This 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 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* $Id$
*
* @file threads.h
* @brief Macros to abstract Thread Local Storage
*
* @copyright 2013 The FreeRADIUS server project
*/
typedef void (*pthread_destructor_t)(void*);
#if !defined(HAVE_PTHREAD_H) && defined(WITH_THREADS)
# error WITH_THREADS defined, but pthreads not available
#endif
/*
* First figure whether we have compiler support this is usually the case except on OSX,
* where we need to use pthreads.
*/
#ifdef TLS_STORAGE_CLASS
# define __THREAD TLS_STORAGE_CLASS
#endif
/*
* Now we define three macros for initialisation, updating, and retrieving
*/
#ifndef WITH_THREADS
# define fr_thread_local_setup(_t, _n) static _t _n;\
static inline int __fr_thread_local_destructor_##_n(pthread_destructor_t *ctx)\
{\
pthread_destructor_t func = *ctx;\
func(_n);\
return 0;\
}\
DIAG_OFF(deprecated-declarations) \
static inline _t __fr_thread_local_init_##_n(pthread_destructor_t func)\
{\
static pthread_destructor_t *ctx;\
if (!ctx) {\
ctx = talloc(talloc_autofree_context(), pthread_destructor_t);\
talloc_set_destructor(ctx, __fr_thread_local_destructor_##_n);\
*ctx = func;\
}\
return _n;\
} \
DIAG_ON(deprecated-declarations)
# define fr_thread_local_init(_n, _f) __fr_thread_local_init_##_n(_f)
# define fr_thread_local_set(_n, _v) ((int)!((_n = _v) || 1))
# define fr_thread_local_get(_n) _n
#elif defined(__THREAD)
# include <pthread.h>
# define fr_thread_local_setup(_t, _n) static __THREAD _t _n;\
static pthread_key_t __fr_thread_local_key_##_n;\
static pthread_once_t __fr_thread_local_once_##_n = PTHREAD_ONCE_INIT;\
static pthread_destructor_t __fr_thread_local_destructor_##_n = NULL;\
static void __fr_thread_local_destroy_##_n(UNUSED void *unused)\
{\
__fr_thread_local_destructor_##_n(_n);\
}\
static void __fr_thread_local_key_init_##_n(void)\
{\
(void) pthread_key_create(&__fr_thread_local_key_##_n, __fr_thread_local_destroy_##_n);\
}\
static _t __fr_thread_local_init_##_n(pthread_destructor_t func)\
{\
__fr_thread_local_destructor_##_n = func;\
if (_n) return _n; \
(void) pthread_once(&__fr_thread_local_once_##_n, __fr_thread_local_key_init_##_n);\
(void) pthread_setspecific(__fr_thread_local_key_##_n, &(_n));\
return _n;\
}
# define fr_thread_local_init(_n, _f) __fr_thread_local_init_##_n(_f)
# define fr_thread_local_set(_n, _v) ((int)!((_n = _v) || 1))
# define fr_thread_local_get(_n) _n
#elif defined(HAVE_PTHREAD_H)
# include <pthread.h>
# define fr_thread_local_setup(_t, _n) \
static pthread_key_t __fr_thread_local_key_##_n;\
static pthread_once_t __fr_thread_local_once_##_n = PTHREAD_ONCE_INIT;\
static pthread_destructor_t __fr_thread_local_destructor_##_n = NULL;\
static void __fr_thread_local_destroy_##_n(UNUSED void *unused)\
{\
__fr_thread_local_destructor_##_n(_n);\
}\
static void __fr_thread_local_key_init_##_n(void)\
{\
(void) pthread_key_create(&__fr_thread_local_key_##_n, __fr_thread_local_destroy_##_n);\
(void) pthread_setspecific(__fr_thread_local_key_##_n, &(_n));\
}\
static _t __fr_thread_local_init_##_n(pthread_destructor_t func)\
{\
__fr_thread_local_destructor_##_n = func;\
if (_n) return _n; \
(void) pthread_once(&__fr_thread_local_once_##_n, __fr_thread_local_key_init_##_n);\
return _n;\
}
# define fr_thread_local_init(_n, _f) __fr_thread_local_init_##_n(_f)
# define fr_thread_local_set(_n, _v) __fr_thread_local_set_##_n(_v)
# define fr_thread_local_get(_n) __fr_thread_local_get_##_n()
#endif
#endif
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