Imported Upstream version 16.11

Change-Id: I1944c65ddc88a9ad70f8c0eb6731552b84fbcb77
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>

1 files changed, 21 insertions, 3 deletions

diff --git a/lib/librte_eal/common/include/generic/rte_cycles.h b/lib/librte_eal/common/include/generic/rte_cycles.h
index 8cc21f20..00103ca9 100644
--- a/lib/librte_eal/common/include/generic/rte_cycles.h
+++ b/lib/librte_eal/common/include/generic/rte_cycles.h
@@ -180,15 +180,16 @@ rte_get_timer_hz(void)
 	default: rte_panic("Invalid timer source specified\n");
 	}
 }
-
 /**
  * Wait at least us microseconds.
+ * This function can be replaced with user-defined function.
+ * @see rte_delay_us_callback_register
  *
  * @param us
  *   The number of microseconds to wait.
  */
-void
-rte_delay_us(unsigned us);
+extern void
+(*rte_delay_us)(unsigned int us);
 
 /**
  * Wait at least ms milliseconds.
@@ -202,4 +203,21 @@ rte_delay_ms(unsigned ms)
 	rte_delay_us(ms * 1000);
 }
 
+/**
+ * Blocking delay function.
+ *
+ * @param us
+ *   Number of microseconds to wait.
+ */
+void rte_delay_us_block(unsigned int us);
+
+/**
+ * Replace rte_delay_us with user defined function.
+ *
+ * @param userfunc
+ *   User function which replaces rte_delay_us. rte_delay_us_block restores
+ *   buildin block delay function.
+ */
+void rte_delay_us_callback_register(void(*userfunc)(unsigned int));
+
 #endif /* _RTE_CYCLES_H_ */