include/lttng/tracepoint-rcu.h

   1 #ifndef _LTTNG_TRACEPOINT_RCU_H
   2 #define _LTTNG_TRACEPOINT_RCU_H
   3
   4 /*
   5  * Copyright 2011-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  */
  17
  18 #include <urcu/compiler.h>
  19
  20 #ifdef _LGPL_SOURCE
  21
  22 #include <urcu-bp.h>
  23
  24 #define tp_rcu_read_lock_bp     rcu_read_lock_bp
  25 #define tp_rcu_read_unlock_bp   rcu_read_unlock_bp
  26 #define tp_rcu_dereference_bp   rcu_dereference_bp
  27 #define TP_RCU_LINK_TEST()      1
  28
  29 #else   /* _LGPL_SOURCE */
  30
  31 #define tp_rcu_read_lock_bp     tracepoint_dlopen.rcu_read_lock_sym_bp
  32 #define tp_rcu_read_unlock_bp   tracepoint_dlopen.rcu_read_unlock_sym_bp
  33
  34 #define tp_rcu_dereference_bp(p)                                             \
  35         ({                                                                   \
  36                 typeof(p) _________p1 = URCU_FORCE_CAST(typeof(p),           \
  37                         tracepoint_dlopen.rcu_dereference_sym_bp(URCU_FORCE_CAST(void *, p))); \
  38                 (_________p1);                                               \
  39         })
  40
  41 #define TP_RCU_LINK_TEST()      tp_rcu_read_lock_bp
  42
  43 #endif  /* _LGPL_SOURCE */
  44
  45 #endif  /* _LTTNG_TRACEPOINT_RCU_H */