Module: xenomai-2.5
Branch: master
Commit: 410a9890e200385bc7aa40de8db8f6d924471db2
URL:
http://git.xenomai.org/?p=xenomai-2.5.git;a=commit;h=410a9890e200385bc7aa40de8db8f6d924471db2
Author: Philippe Gerum <r...@xenomai.org>
Date: Sun Mar 28 23:18:35 2010 +0200
nucleus: introduce bufd reset operation
---
include/nucleus/bufd.h | 5 +++++
ksrc/nucleus/bufd.c | 20 ++++++++++++++++++++
2 files changed, 25 insertions(+), 0 deletions(-)
diff --git a/include/nucleus/bufd.h b/include/nucleus/bufd.h
index ac1998a..262e546 100644
--- a/include/nucleus/bufd.h
+++ b/include/nucleus/bufd.h
@@ -97,6 +97,11 @@ ssize_t xnbufd_copy_from_kmem(struct xnbufd *bufd,
void xnbufd_invalidate(struct xnbufd *bufd);
+static inline void xnbufd_reset(struct xnbufd *bufd)
+{
+ bufd->b_off = 0;
+}
+
/*...@}*/
#endif /* !_XENO_NUCLEUS_BUFD_H */
diff --git a/ksrc/nucleus/bufd.c b/ksrc/nucleus/bufd.c
index d7a7b00..c482b9d 100644
--- a/ksrc/nucleus/bufd.c
+++ b/ksrc/nucleus/bufd.c
@@ -627,6 +627,26 @@ done:
EXPORT_SYMBOL_GPL(xnbufd_unmap_uwrite);
/*!
+ * \fn void xnbufd_reset(struct xnbufd *bufd)
+ * \brief Reset a buffer descriptor.
+ *
+ * The buffer descriptor is reset, so that all data already copied is
+ * forgotten. Any carry over buffer allocated is kept, though.
+ *
+ * @param bufd The address of the buffer descriptor to reset.
+ *
+ * Environments:
+ *
+ * This service can be called from:
+ *
+ * - Kernel code (including from primary mode)
+ * - Kernel-based task
+ * - Interrupt service routine
+ *
+ * Rescheduling: never.
+ */
+
+/*!
* \fn void xnbufd_invalidate(struct xnbufd *bufd)
* \brief Invalidate a buffer descriptor.
*
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