/* Do not #define _LGPL_SOURCE to ensure we can emit the wrapper symbols */
#include "urcu.h"
+#ifndef DEBUG_FULL_MB
void __attribute__((constructor)) urcu_init(void);
void __attribute__((destructor)) urcu_exit(void);
+#else
+static inline void urcu_init(void)
+{
+}
+#endif
int init_done;
*/
/*
- * Current RCU formal verification model assumes sequential execution of
- * the write-side. Add core synchronization instructions. Can be removed
- * if the formal model is extended to prove that reordering is still
- * correct.
+ * Adding a smp_mb() which is _not_ formally required, but makes the
+ * model easier to understand. It does not have a big performance impact
+ * anyway, given this is the write-side.
*/
- sync_core(); /* Formal model assumes serialized execution */
+ smp_mb();
/*
* Wait for previous parity to be empty of readers.
* Ensured by STORE_SHARED and LOAD_SHARED.
*/
- sync_core(); /* Formal model assumes serialized execution */
+ /*
+ * Adding a smp_mb() which is _not_ formally required, but makes the
+ * model easier to understand. It does not have a big performance impact
+ * anyway, given this is the write-side.
+ */
+ smp_mb();
switch_next_urcu_qparity(); /* 1 -> 0 */
* Ensured by STORE_SHARED and LOAD_SHARED.
*/
- sync_core(); /* Formal model assumes serialized execution */
+ /*
+ * Adding a smp_mb() which is _not_ formally required, but makes the
+ * model easier to understand. It does not have a big performance impact
+ * anyway, given this is the write-side.
+ */
+ smp_mb();
/*
* Wait for previous parity to be empty of readers.
init_done = 1;
act.sa_sigaction = sigurcu_handler;
+ act.sa_flags = SA_SIGINFO;
+ sigemptyset(&act.sa_mask);
ret = sigaction(SIGURCU, &act, NULL);
if (ret) {
perror("Error in sigaction");