uatomic/x86: Remove redundant memory barriers

[urcu.git] / include / urcu / urcu-bp.h

diff --git a/include/urcu/urcu-bp.h b/include/urcu/urcu-bp.h
index d3d122d0f71df610a0276af0e3e5043a6adf4ee7..152c53665ddf64bafdba1c507cdd5d093d3a2f2a 100644 (file)
--- a/include/urcu/urcu-bp.h
+++ b/include/urcu/urcu-bp.h
@@ -1,45 +1,28 @@
+// SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+// SPDX-FileCopyrightText: 2009 Paul E. McKenney, IBM Corporation.
+//
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #ifndef _URCU_BP_H
 #define _URCU_BP_H
 
 /*
- * urcu-bp.h
- *
  * Userspace RCU header, "bulletproof" version.
  *
  * Slower RCU read-side adapted for tracing library. Does not require thread
  * registration nor unregistration. Also signal-safe.
  *
- * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- * Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
- *
  * LGPL-compatible code should include this header with :
  *
  * #define _LGPL_SOURCE
  * #include <urcu.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 Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * IBM's contributions to this file may be relicensed under LGPLv2 or later.
  */
 
 #include <stdlib.h>
 #include <pthread.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
+#include <stdbool.h>
 
 #include <urcu/map/urcu-bp.h>
 
@@ -56,6 +39,11 @@ extern "C" {
  * publication headers.
  */
 #include <urcu/pointer.h>
+#include <urcu/urcu-poll.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 #ifdef _LGPL_SOURCE
 
@@ -140,6 +128,12 @@ extern void *urcu_bp_set_pointer_sym(void **p, void *v);
 
 extern void urcu_bp_synchronize_rcu(void);
 
+/*
+ * RCU grace period polling API.
+ */
+extern struct urcu_gp_poll_state urcu_bp_start_poll_synchronize_rcu(void);
+extern bool urcu_bp_poll_state_synchronize_rcu(struct urcu_gp_poll_state state);
+
 /*
  * urcu_bp_before_fork, urcu_bp_after_fork_parent and urcu_bp_after_fork_child
  * should be called around fork() system calls when the child process is not
@@ -151,12 +145,14 @@ extern void urcu_bp_after_fork_parent(void);
 extern void urcu_bp_after_fork_child(void);
 
 /*
- * In the bulletproof version, the following functions are no-ops.
+ * In the bulletproof version, thread registration is performed lazily,
+ * but it can be forced by issuing an explicit urcu_bp_register_thread().
  */
-static inline void urcu_bp_register_thread(void)
-{
-}
+extern void urcu_bp_register_thread(void);
 
+/*
+ * In the bulletproof version, the following functions are no-ops.
+ */
 static inline void urcu_bp_unregister_thread(void)
 {
 }