X-Git-Url: https://git.lttng.org/?p=urcu.git;a=blobdiff_plain;f=include%2Furcu%2Fstatic%2Fwfcqueue.h;h=5e54cbed3526a7617428f88f9f3e33bbb379fca8;hp=67ac05ffd15e384dc42317e0d5b4d0c93d71c2d6;hb=70469b43316ecc8d6053550504858ad8a8ef9b16;hpb=6893800a4d1cc14dff0395ddcd660a5138db183d

diff --git a/include/urcu/static/wfcqueue.h b/include/urcu/static/wfcqueue.h
index 67ac05f..5e54cbe 100644
--- a/include/urcu/static/wfcqueue.h
+++ b/include/urcu/static/wfcqueue.h
@@ -112,7 +112,7 @@ static inline void _cds_wfcq_init(struct cds_wfcq_head *head,
  * cds_wfcq_init().
  */
 static inline void _cds_wfcq_destroy(struct cds_wfcq_head *head,
-		struct cds_wfcq_tail *tail)
+		struct cds_wfcq_tail *tail __attribute__((unused)))
 {
 	int ret = pthread_mutex_destroy(&head->lock);
 	assert(!ret);
@@ -158,7 +158,7 @@ static inline bool _cds_wfcq_empty(cds_wfcq_head_ptr_t u_head,
 }
 
 static inline void _cds_wfcq_dequeue_lock(struct cds_wfcq_head *head,
-		struct cds_wfcq_tail *tail)
+		struct cds_wfcq_tail *tail __attribute__((unused)))
 {
 	int ret;
 
@@ -167,7 +167,7 @@ static inline void _cds_wfcq_dequeue_lock(struct cds_wfcq_head *head,
 }
 
 static inline void _cds_wfcq_dequeue_unlock(struct cds_wfcq_head *head,
-		struct cds_wfcq_tail *tail)
+		struct cds_wfcq_tail *tail __attribute__((unused)))
 {
 	int ret;
 
@@ -223,6 +223,23 @@ static inline bool _cds_wfcq_enqueue(cds_wfcq_head_ptr_t head,
 	return ___cds_wfcq_append(head, tail, new_tail, new_tail);
 }
 
+/*
+ * CDS_WFCQ_WAIT_SLEEP:
+ *
+ * By default, this sleeps for the given @msec milliseconds.
+ * This is a macro which LGPL users may #define themselves before
+ * including wfcqueue.h to override the default behavior (e.g.
+ * to log a warning or perform other background work).
+ */
+#ifndef CDS_WFCQ_WAIT_SLEEP
+#define CDS_WFCQ_WAIT_SLEEP(msec) ___cds_wfcq_wait_sleep(msec)
+#endif
+
+static inline void ___cds_wfcq_wait_sleep(int msec)
+{
+	(void) poll(NULL, 0, msec);
+}
+
 /*
  * ___cds_wfcq_busy_wait: adaptative busy-wait.
  *
@@ -234,7 +251,7 @@ ___cds_wfcq_busy_wait(int *attempt, int blocking)
 	if (!blocking)
 		return 1;
 	if (++(*attempt) >= WFCQ_ADAPT_ATTEMPTS) {
-		(void) poll(NULL, 0, WFCQ_WAIT);	/* Wait for 10ms */
+		CDS_WFCQ_WAIT_SLEEP(WFCQ_WAIT);		/* Wait for 10ms */
 		*attempt = 0;
 	} else {
 		caa_cpu_relax();
@@ -314,7 +331,7 @@ ___cds_wfcq_first_nonblocking(cds_wfcq_head_ptr_t head,
 }
 
 static inline struct cds_wfcq_node *
-___cds_wfcq_next(cds_wfcq_head_ptr_t head,
+___cds_wfcq_next(cds_wfcq_head_ptr_t head __attribute__((unused)),
 		struct cds_wfcq_tail *tail,
 		struct cds_wfcq_node *node,
 		int blocking)