include/lttng/tracepoint-rcu.h

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  */
   6
   7 #ifndef _LTTNG_UST_TRACEPOINT_RCU_H
   8 #define _LTTNG_UST_TRACEPOINT_RCU_H
   9
  10 #include <urcu/compiler.h>
  11 #include <lttng/urcu/pointer.h>
  12 #include <lttng/ust-api-compat.h>
  13
  14 #ifdef _LGPL_SOURCE
  15
  16 #include <lttng/urcu/urcu-ust.h>
  17
  18 #define lttng_ust_tp_rcu_read_lock      lttng_ust_urcu_read_lock
  19 #define lttng_ust_tp_rcu_read_unlock    lttng_ust_urcu_read_unlock
  20 #define lttng_ust_tp_rcu_dereference    lttng_ust_rcu_dereference
  21 #define LTTNG_UST_TP_RCU_LINK_TEST()    1
  22
  23 #else   /* _LGPL_SOURCE */
  24
  25 #define lttng_ust_tp_rcu_read_lock      lttng_ust_tracepoint_dlopen_ptr->rcu_read_lock_sym
  26 #define lttng_ust_tp_rcu_read_unlock    lttng_ust_tracepoint_dlopen_ptr->rcu_read_unlock_sym
  27
  28 #define lttng_ust_tp_rcu_dereference(p)                                            \
  29                 URCU_FORCE_CAST(__typeof__(p),                             \
  30                         lttng_ust_tracepoint_dlopen_ptr->rcu_dereference_sym(URCU_FORCE_CAST(void *, p)))
  31
  32 #define LTTNG_UST_TP_RCU_LINK_TEST()    (lttng_ust_tracepoint_dlopen_ptr && tp_rcu_read_lock)
  33
  34 #endif  /* _LGPL_SOURCE */
  35
  36 #if LTTNG_UST_COMPAT_API(0)
  37 #define tp_rcu_read_lock        lttng_ust_tp_rcu_read_lock
  38 #define tp_rcu_read_unlock      lttng_ust_tp_rcu_read_unlock
  39 #define tp_rcu_dereference      lttng_ust_tp_rcu_dereference
  40 #define TP_RCU_LINK_TEST        LTTNG_UST_TP_RCU_LINK_TEST
  41 #endif
  42
  43 #endif  /* _LTTNG_UST_TRACEPOINT_RCU_H */