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  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  */
  25
  26 #include <urcu/compiler.h>
  27
  28 #ifdef _LGPL_SOURCE
  29
  30 #include <urcu/urcu-bp.h>
  31
  32 #define tp_rcu_read_lock_bp     urcu_bp_read_lock
  33 #define tp_rcu_read_unlock_bp   urcu_bp_read_unlock
  34 #define tp_rcu_dereference_bp   rcu_dereference
  35 #define TP_RCU_LINK_TEST()      1
  36
  37 #else   /* _LGPL_SOURCE */
  38
  39 #define tp_rcu_read_lock_bp     tracepoint_dlopen_ptr->rcu_read_lock_sym_bp
  40 #define tp_rcu_read_unlock_bp   tracepoint_dlopen_ptr->rcu_read_unlock_sym_bp
  41
  42 #define tp_rcu_dereference_bp(p)                                           \
  43                 URCU_FORCE_CAST(__typeof__(p),                             \
  44                         tracepoint_dlopen_ptr->rcu_dereference_sym_bp(URCU_FORCE_CAST(void *, p)))
  45
  46 #define TP_RCU_LINK_TEST()      (tracepoint_dlopen_ptr && tp_rcu_read_lock_bp)
  47
  48 #endif  /* _LGPL_SOURCE */
  49
  50 #endif  /* _LTTNG_TRACEPOINT_RCU_H */