projects / lttng-ust.git / blame
| Commit | Line | Data |
|---|---|---|
| 40b2b5a4 MD |
1 | #ifndef _LTTNG_TRACEPOINT_RCU_H |
| 2 | #define _LTTNG_TRACEPOINT_RCU_H | |
| 3 | ||
| 4 | /* | |
| 5 | * Copyright (c) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
| 6 | * | |
| 7 | * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED | |
| 8 | * OR IMPLIED. ANY USE IS AT YOUR OWN RISK. | |
| 9 | * | |
| 10 | * Permission is hereby granted to use or copy this program | |
| 11 | * for any purpose, provided the above notices are retained on all copies. | |
| 12 | * Permission to modify the code and to distribute modified code is granted, | |
| 13 | * provided the above notices are retained, and a notice that the code was | |
| 14 | * modified is included with the above copyright notice. | |
| 15 | * | |
| 16 | * This file allows weak linking on tracepoint RCU symbols for non-LGPL | |
| 17 | * code. | |
| 18 | */ | |
| 19 | ||
| 20 | #include <urcu/compiler.h> | |
| 21 | ||
| 22 | #ifdef _LGPL_SOURCE | |
| 23 | ||
| 24 | #include <urcu-bp.h> | |
| 25 | ||
| 26 | #define TP_RCU_LINK_TEST() 1 | |
| 27 | #define tp_rcu_read_lock_bp rcu_read_lock_bp | |
| 28 | #define tp_rcu_read_unlock_bp rcu_read_unlock_bp | |
| 29 | #define tp_rcu_dereference_bp rcu_dereference_bp | |
| 30 | ||
| 31 | #else /* _LGPL_SOURCE */ | |
| 32 | ||
| 33 | #define TP_RCU_LINK_TEST() tp_rcu_read_lock_bp | |
| 34 | ||
| 35 | /* Symbols looked up with dlsym */ | |
| 36 | static void (*tp_rcu_read_lock_bp)(void) __attribute__((unused)); | |
| 37 | static void (*tp_rcu_read_unlock_bp)(void) __attribute__((unused)); | |
| 38 | static void *(*tp_rcu_dereference_sym_bp)(void *p) __attribute__((unused)); | |
| 39 | ||
| 40 | #define tp_rcu_dereference_bp(p) \ | |
| 41 | ({ \ | |
| 42 | typeof(p) _________p1 = URCU_FORCE_CAST(typeof(p), \ | |
| 43 | tp_rcu_dereference_sym_bp(URCU_FORCE_CAST(void *, p))); \ | |
| 44 | (_________p1); \ | |
| 45 | }) | |
| 46 | ||
| 47 | #endif /* _LGPL_SOURCE */ | |
| 48 | ||
| 49 | #endif /* _LTTNG_TRACEPOINT_RCU_H */ |