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authorSebastian Huber <sebastian.huber@embedded-brains.de>2021-07-15 16:51:17 +0200
committerSebastian Huber <sebastian.huber@embedded-brains.de>2022-03-24 11:10:48 +0100
commitd0de6fdfa8312147e7d991cf5326e3394b9abf3c (patch)
tree3159cd3197e57212eec736e4aa01bace5a5644e4 /cpukit/include
parentnewlib01: Adjust variable name (diff)
downloadrtems-d0de6fdfa8312147e7d991cf5326e3394b9abf3c.tar.bz2
score: Add _IO_Relax()
This function may be used to burn a couple of processor cycles with minimum impact on the system bus. It may be used in busy wait loops. Since it is a global function, it is possible to wrap it in device driver test code.
Diffstat (limited to 'cpukit/include')
-rw-r--r--cpukit/include/rtems/score/io.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/cpukit/include/rtems/score/io.h b/cpukit/include/rtems/score/io.h
index d7bf188be0..106418f185 100644
--- a/cpukit/include/rtems/score/io.h
+++ b/cpukit/include/rtems/score/io.h
@@ -133,6 +133,14 @@ int _IO_Base64url(
int wordlen
);
+/**
+ * @brief Issues a couple of no-operation instructions.
+ *
+ * This function may be used to burn a couple of processor cycles with minimum
+ * impact on the system bus. It may be used in busy wait loops.
+ */
+void _IO_Relax( void );
+
/** @} */
#ifdef __cplusplus