include/lttng/tracepoint-rcu.h

   1 // SPDX-FileCopyrightText: 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   2 //
   3 // SPDX-License-Identifier: MIT
   4
   5 #ifndef _LTTNG_UST_TRACEPOINT_RCU_H
   6 #define _LTTNG_UST_TRACEPOINT_RCU_H
   7
   8 #include <urcu/compiler.h>
   9 #include <lttng/urcu/pointer.h>
  10 #include <lttng/ust-api-compat.h>
  11
  12 #ifdef _LGPL_SOURCE
  13
  14 #include <lttng/urcu/urcu-ust.h>
  15
  16 #define lttng_ust_tp_rcu_read_lock      lttng_ust_urcu_read_lock
  17 #define lttng_ust_tp_rcu_read_unlock    lttng_ust_urcu_read_unlock
  18 #define lttng_ust_tp_rcu_dereference    lttng_ust_rcu_dereference
  19 #define LTTNG_UST_TP_RCU_LINK_TEST()    1
  20
  21 #else   /* _LGPL_SOURCE */
  22
  23 #define lttng_ust_tp_rcu_read_lock      lttng_ust_tracepoint_dlopen_ptr->rcu_read_lock_sym
  24 #define lttng_ust_tp_rcu_read_unlock    lttng_ust_tracepoint_dlopen_ptr->rcu_read_unlock_sym
  25
  26 #define lttng_ust_tp_rcu_dereference(p)                                            \
  27                 URCU_FORCE_CAST(__typeof__(p),                             \
  28                         lttng_ust_tracepoint_dlopen_ptr->rcu_dereference_sym(URCU_FORCE_CAST(void *, p)))
  29
  30 #define LTTNG_UST_TP_RCU_LINK_TEST()    (lttng_ust_tracepoint_dlopen_ptr && lttng_ust_tp_rcu_read_lock)
  31
  32 #endif  /* _LGPL_SOURCE */
  33
  34 #if LTTNG_UST_COMPAT_API(0)
  35 #define tp_rcu_read_lock        lttng_ust_tp_rcu_read_lock
  36 #define tp_rcu_read_unlock      lttng_ust_tp_rcu_read_unlock
  37 #define tp_rcu_dereference      lttng_ust_tp_rcu_dereference
  38 #define TP_RCU_LINK_TEST        LTTNG_UST_TP_RCU_LINK_TEST
  39 #endif
  40
  41 #endif  /* _LTTNG_UST_TRACEPOINT_RCU_H */