+++ /dev/null
-#ifndef _URCU_TLS_COMPAT_H
-#define _URCU_TLS_COMPAT_H
-
-/*
- * urcu/tls-compat.h
- *
- * Userspace RCU library - Thread-Local Storage Compatibility Header
- *
- * Copyright 2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <stdlib.h>
-#include <urcu/config.h>
-#include <urcu/compiler.h>
-#include <urcu/arch.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifdef CONFIG_RCU_TLS /* Based on ax_tls.m4 */
-
-/*
- * Hint: How to define/declare TLS variables of compound types
- * such as array or function pointers?
- *
- * Answer: Use typedef to assign a type_name to the compound type.
- * Example: Define a TLS variable which is an int array with len=4:
- *
- * typedef int my_int_array_type[4];
- * DEFINE_URCU_TLS(my_int_array_type, var_name);
- *
- * Another example:
- * typedef void (*call_rcu_flavor)(struct rcu_head *, XXXX);
- * DECLARE_URCU_TLS(call_rcu_flavor, p_call_rcu);
- *
- * NOTE: URCU_TLS() is NOT async-signal-safe, you can't use it
- * inside any function which can be called from signal handler.
- *
- * But if pthread_getspecific() is async-signal-safe in your
- * platform, you can make URCU_TLS() async-signal-safe via:
- * ensuring the first call to URCU_TLS() of a given TLS variable of
- * all threads is called earliest from a non-signal handler function.
- *
- * Example: In any thread, the first call of URCU_TLS(rcu_reader)
- * is called from rcu_register_thread(), so we can ensure all later
- * URCU_TLS(rcu_reader) in any thread is async-signal-safe.
- *
- * Moreover, URCU_TLS variables should not be touched from signal
- * handlers setup with with sigaltstack(2).
- */
-
-# define DECLARE_URCU_TLS(type, name) \
- CONFIG_RCU_TLS type name
-
-# define DEFINE_URCU_TLS(type, name) \
- CONFIG_RCU_TLS type name
-
-# define URCU_TLS(name) (name)
-
-#else /* #ifndef CONFIG_RCU_TLS */
-
-/*
- * The *_1() macros ensure macro parameters are expanded.
- */
-
-# include <pthread.h>
-
-struct urcu_tls {
- pthread_key_t key;
- pthread_mutex_t init_mutex;
- int init_done;
-};
-
-# define DECLARE_URCU_TLS_1(type, name) \
- type *__tls_access_ ## name(void)
-# define DECLARE_URCU_TLS(type, name) \
- DECLARE_URCU_TLS_1(type, name)
-
-/*
- * Note: we don't free memory at process exit, since it will be dealt
- * with by the OS.
- */
-# define DEFINE_URCU_TLS_1(type, name) \
- type *__tls_access_ ## name(void) \
- { \
- static struct urcu_tls __tls_ ## name = { \
- .init_mutex = PTHREAD_MUTEX_INITIALIZER,\
- .init_done = 0, \
- }; \
- void *__tls_p; \
- if (!__tls_ ## name.init_done) { \
- /* Mutex to protect concurrent init */ \
- pthread_mutex_lock(&__tls_ ## name.init_mutex); \
- if (!__tls_ ## name.init_done) { \
- (void) pthread_key_create(&__tls_ ## name.key, \
- free); \
- cmm_smp_wmb(); /* create key before write init_done */ \
- __tls_ ## name.init_done = 1; \
- } \
- pthread_mutex_unlock(&__tls_ ## name.init_mutex); \
- } \
- cmm_smp_rmb(); /* read init_done before getting key */ \
- __tls_p = pthread_getspecific(__tls_ ## name.key); \
- if (caa_unlikely(__tls_p == NULL)) { \
- __tls_p = calloc(1, sizeof(type)); \
- (void) pthread_setspecific(__tls_ ## name.key, \
- __tls_p); \
- } \
- return __tls_p; \
- }
-
-# define DEFINE_URCU_TLS(type, name) \
- DEFINE_URCU_TLS_1(type, name)
-
-# define URCU_TLS_1(name) (*__tls_access_ ## name())
-
-# define URCU_TLS(name) URCU_TLS_1(name)
-
-#endif /* #else #ifndef CONFIG_RCU_TLS */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _URCU_TLS_COMPAT_H */
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