Current File : //backups/router/usr/local/include/syslog-ng/tls-support.h
/*
* Copyright (c) 2002-2011 Balabit
* Copyright (c) 1998-2011 Balázs Scheidler
*
* 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
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*/
#ifndef TLS_SUPPORT_H_INCLUDED
#define TLS_SUPPORT_H_INCLUDED
/* this header is about Thread Local Storage and not about Transport Layer Security */
#include <syslog-ng-config.h>
#ifndef SYSLOG_NG_HAVE_THREAD_KEYWORD
#include <stdlib.h>
#include <pthread.h>
static struct __tls_variables *
__tls_init_thread(pthread_key_t key, size_t size)
{
struct __tls_variables *ptr;
ptr = calloc(1, size);
if (!ptr)
abort();
pthread_setspecific(key, ptr);
return ptr;
}
static inline struct __tls_variables *__tls_deref_helper(pthread_key_t key, size_t size)
{
struct __tls_variables *ptr;
ptr = pthread_getspecific(key);
if (!ptr)
ptr = __tls_init_thread(key, size);
return ptr;
}
#define TLS_BLOCK_START \
static pthread_key_t __tls_key; \
static void __attribute__((constructor)) __tls_init_key(void) \
{ \
pthread_key_create(&__tls_key, free); \
} \
\
struct __tls_variables
#define TLS_BLOCK_END
#define __tls_deref(var) (*({ struct __tls_variables *__ptr = __tls_deref_helper(__tls_key, sizeof(struct __tls_variables)); &__ptr->var; }))
#define __thread #
#else /* SYSLOG_NG_HAVE_TLS */
#define TLS_BLOCK_START \
struct __tls_variables
#define TLS_BLOCK_END \
; \
static __thread struct __tls_variables __tls
#define __tls_deref(var) (__tls.var)
#endif
#endif
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