src/urcu-pointer.c

   1 // SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   2 // SPDX-FileCopyrightText: 2009 Paul E. McKenney, IBM Corporation.
   3 //
   4 // SPDX-License-Identifier: LGPL-2.1-or-later
   5
   6 /*
   7  * library wrappers to be used by non-LGPL compatible source code.
   8  *
   9  * IBM's contributions to this file may be relicensed under LGPLv2 or later.
  10  */
  11
  12 #include <urcu/uatomic.h>
  13
  14 #include <urcu/static/pointer.h>
  15 /* Do not #define _LGPL_SOURCE to ensure we can emit the wrapper symbols */
  16 #include <urcu/pointer.h>
  17
  18 extern void synchronize_rcu(void);
  19
  20 void *rcu_dereference_sym(void *p)
  21 {
  22         return _rcu_dereference(p);
  23 }
  24
  25 void *rcu_set_pointer_sym(void **p, void *v)
  26 {
  27         uatomic_store(p, v, CMM_RELEASE);
  28         return v;
  29 }
  30
  31 void *rcu_xchg_pointer_sym(void **p, void *v)
  32 {
  33         return uatomic_xchg_mo(p, v, CMM_SEQ_CST);
  34 }
  35
  36 void *rcu_cmpxchg_pointer_sym(void **p, void *old, void *_new)
  37 {
  38         return uatomic_cmpxchg_mo(p, old, _new, CMM_SEQ_CST, CMM_RELAXED);
  39 }