X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=urcu-pointer.h;h=027a18fd4d0b57159a096e5a575d1618ddcfe364;hp=0a3524fa1e0b7b65cd6ec8154c9a45b2bf36abb5;hb=a2e7bf9ce5de5113c7f59c380b0087e291cd603d;hpb=b1048d48b166d50e10d1eb3a1e512a7bffb2a265 diff --git a/urcu-pointer.h b/urcu-pointer.h index 0a3524f..027a18f 100644 --- a/urcu-pointer.h +++ b/urcu-pointer.h @@ -6,7 +6,7 @@ * * Userspace RCU header. Operations on pointers. * - * Copyright (c) 2009 Mathieu Desnoyers + * Copyright (c) 2009 Mathieu Desnoyers * Copyright (c) 2009 Paul E. McKenney, IBM Corporation. * * This library is free software; you can redistribute it and/or @@ -28,11 +28,15 @@ #include #include -#include +#include + +#ifdef __cplusplus +extern "C" { +#endif #ifdef _LGPL_SOURCE -#include +#include /* * rcu_dereference(ptr) @@ -60,21 +64,41 @@ #else /* !_LGPL_SOURCE */ -extern void *rcu_dereference(void *p); +extern void *rcu_dereference_sym(void *p); +#define rcu_dereference(p) \ + ({ \ + typeof(p) _________p1 = \ + rcu_dereference_sym((void *)(p)); \ + (_________p1); \ + }) extern void *rcu_cmpxchg_pointer_sym(void **p, void *old, void *_new); -#define rcu_cmpxchg_pointer(p, old, _new) \ - rcu_cmpxchg_pointer_sym((void **)(p), (old), (_new)) +#define rcu_cmpxchg_pointer(p, old, _new) \ + ({ \ + typeof(*p) _________pold = (old); \ + typeof(*p) _________pnew = (_new); \ + typeof(*p) _________p1 = \ + rcu_cmpxchg_pointer_sym((void **)(p), _________pold, \ + _________pnew); \ + (_________p1); \ + }) extern void *rcu_xchg_pointer_sym(void **p, void *v); -#define rcu_xchg_pointer(p, v) \ - rcu_xchg_pointer_sym((void **)(p), (v)) +#define rcu_xchg_pointer(p, v) \ + ({ \ + typeof(*p) _________pv = (v); \ + typeof(*p) _________p1 = \ + rcu_xchg_pointer_sym((void **)(p), _________pv); \ + (_________p1); \ + }) extern void *rcu_set_pointer_sym(void **p, void *v); -#define rcu_set_pointer(p, v) \ - rcu_set_pointer_sym((void **)(p), (v)) - -extern void *rcu_assign_pointer_sym(void **p, void *v); +#define rcu_set_pointer(p, v) \ + ({ \ + typeof(*p) _________pv = (v); \ + typeof(*p) _________p1 = \ + rcu_set_pointer_sym((void **)(p), _________pv); \ + }) #endif /* !_LGPL_SOURCE */ @@ -87,4 +111,8 @@ extern void *rcu_assign_pointer_sym(void **p, void *v); */ #define rcu_assign_pointer(p, v) rcu_set_pointer((&p), (v)) +#ifdef __cplusplus +} +#endif + #endif /* _URCU_POINTER_H */