struct call_rcu_completion *completion;
};
+enum crdf_flags {
+ CRDF_FLAG_JOIN_THREAD = (1 << 0),
+};
+
/*
* List of all call_rcu_data structures to keep valgrind happy.
* Protected by call_rcu_mutex.
static struct call_rcu_data *default_call_rcu_data;
static struct urcu_atfork *registered_rculfhash_atfork;
-static unsigned long registered_rculfhash_atfork_refcount;
/*
* If the sched_getcpu() and sysconf(_SC_NPROCESSORS_CONF) calls are
{
struct call_rcu_data *crdp;
int ret;
+ sigset_t newmask, oldmask;
crdp = malloc(sizeof(*crdp));
if (crdp == NULL)
crdp->gp_count = 0;
cmm_smp_mb(); /* Structure initialized before pointer is planted. */
*crdpp = crdp;
+
+ ret = sigfillset(&newmask);
+ urcu_posix_assert(!ret);
+ ret = pthread_sigmask(SIG_BLOCK, &newmask, &oldmask);
+ urcu_posix_assert(!ret);
+
ret = pthread_create(&crdp->tid, NULL, call_rcu_thread, crdp);
if (ret)
urcu_die(ret);
+
+ ret = pthread_sigmask(SIG_SETMASK, &oldmask, NULL);
+ urcu_posix_assert(!ret);
}
/*
* a list corruption bug in the 0.7.x series. The equivalent fix
* appeared in 0.6.8 for the stable-0.6 branch.
*/
-void call_rcu_data_free(struct call_rcu_data *crdp)
+static
+void _call_rcu_data_free(struct call_rcu_data *crdp, unsigned int flags)
{
if (crdp == NULL || crdp == default_call_rcu_data) {
return;
cds_list_del(&crdp->list);
call_rcu_unlock(&call_rcu_mutex);
+ if (flags & CRDF_FLAG_JOIN_THREAD) {
+ int ret;
+
+ ret = pthread_join(get_call_rcu_thread(crdp), NULL);
+ if (ret)
+ urcu_die(ret);
+ }
free(crdp);
}
+void call_rcu_data_free(struct call_rcu_data *crdp)
+{
+ _call_rcu_data_free(crdp, CRDF_FLAG_JOIN_THREAD);
+}
+
/*
* Clean up all the per-CPU call_rcu threads.
*/
if (crdp == default_call_rcu_data)
continue;
uatomic_set(&crdp->flags, URCU_CALL_RCU_STOPPED);
- call_rcu_data_free(crdp);
+ /*
+ * Do not join the thread because it does not exist in
+ * the child.
+ */
+ _call_rcu_data_free(crdp, 0);
}
}
void urcu_register_rculfhash_atfork(struct urcu_atfork *atfork)
{
+ if (CMM_LOAD_SHARED(registered_rculfhash_atfork))
+ return;
call_rcu_lock(&call_rcu_mutex);
- if (registered_rculfhash_atfork_refcount++)
- goto end;
- registered_rculfhash_atfork = atfork;
-end:
+ if (!registered_rculfhash_atfork)
+ registered_rculfhash_atfork = atfork;
call_rcu_unlock(&call_rcu_mutex);
}
+/*
+ * This unregistration function is deprecated, meant only for internal
+ * use by rculfhash.
+ */
+__attribute__((noreturn))
void urcu_unregister_rculfhash_atfork(struct urcu_atfork *atfork __attribute__((unused)))
{
- call_rcu_lock(&call_rcu_mutex);
- if (--registered_rculfhash_atfork_refcount)
- goto end;
- registered_rculfhash_atfork = NULL;
-end:
- call_rcu_unlock(&call_rcu_mutex);
+ urcu_die(EPERM);
}