Fix: only define membarrier system call on Linux

[urcu.git] / urcu-call-rcu.h

diff --git a/urcu-call-rcu.h b/urcu-call-rcu.h
index e76a844018f2e24a129ab1e3db957ec90f6cdf40..339ebacc3f7c013975d62370ca27aa47b282e724 100644 (file)
--- a/urcu-call-rcu.h
+++ b/urcu-call-rcu.h
@@ -32,7 +32,7 @@
 #include <stdlib.h>
 #include <pthread.h>
 
-#include <urcu/wfqueue.h>
+#include <urcu/wfcqueue.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -44,10 +44,12 @@ struct call_rcu_data;
 
 /* Flag values. */
 
-#define URCU_CALL_RCU_RT       0x1
-#define URCU_CALL_RCU_RUNNING  0x2
-#define URCU_CALL_RCU_STOP     0x4
-#define URCU_CALL_RCU_STOPPED  0x8
+#define URCU_CALL_RCU_RT       (1U << 0)
+#define URCU_CALL_RCU_RUNNING  (1U << 1)
+#define URCU_CALL_RCU_STOP     (1U << 2)
+#define URCU_CALL_RCU_STOPPED  (1U << 3)
+#define URCU_CALL_RCU_PAUSE    (1U << 4)
+#define URCU_CALL_RCU_PAUSED   (1U << 5)
 
 /*
  * The rcu_head data structure is placed in the structure to be freed
@@ -55,30 +57,44 @@ struct call_rcu_data;
  */
 
 struct rcu_head {
-       struct cds_wfq_node next;
+       struct cds_wfcq_node next;
        void (*func)(struct rcu_head *head);
 };
 
 /*
  * Exported functions
+ *
+ * Important: see rcu-api.md in userspace-rcu documentation for
+ * call_rcu family of functions usage detail, including the surrounding
+ * RCU usage required when using these primitives.
  */
-struct call_rcu_data *get_cpu_call_rcu_data(int cpu);
-pthread_t get_call_rcu_thread(struct call_rcu_data *crdp);
+
+void call_rcu(struct rcu_head *head,
+             void (*func)(struct rcu_head *head));
+
 struct call_rcu_data *create_call_rcu_data(unsigned long flags,
                                           int cpu_affinity);
-int set_cpu_call_rcu_data(int cpu, struct call_rcu_data *crdp);
+void call_rcu_data_free(struct call_rcu_data *crdp);
+
 struct call_rcu_data *get_default_call_rcu_data(void);
-struct call_rcu_data *get_call_rcu_data(void);
+struct call_rcu_data *get_cpu_call_rcu_data(int cpu);
 struct call_rcu_data *get_thread_call_rcu_data(void);
+struct call_rcu_data *get_call_rcu_data(void);
+pthread_t get_call_rcu_thread(struct call_rcu_data *crdp);
+
 void set_thread_call_rcu_data(struct call_rcu_data *crdp);
+int set_cpu_call_rcu_data(int cpu, struct call_rcu_data *crdp);
+
 int create_all_cpu_call_rcu_data(unsigned long flags);
-void call_rcu(struct rcu_head *head,
-             void (*func)(struct rcu_head *head));
-void call_rcu_data_free(struct call_rcu_data *crdp);
 void free_all_cpu_call_rcu_data(void);
+
+void call_rcu_before_fork(void);
+void call_rcu_after_fork_parent(void);
 void call_rcu_after_fork_child(void);
 
-#ifdef __cplusplus 
+void rcu_barrier(void);
+
+#ifdef __cplusplus
 }
 #endif