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mm/iob: add support of nonblock iob_clone

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Signed-off-by: chao an <anchao@xiaomi.com>
This commit is contained in:
chao an 2022-12-13 16:08:27 +08:00 committed by Xiang Xiao
parent 80fa70da4e
commit d6d56c3372
3 changed files with 15 additions and 5 deletions
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3
Documentation/reference/os/iob.rst
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@ -267,7 +267,8 @@ Public Function Prototypes
buffer starting at ``offset`` in the I/O buffer, returning that buffer starting at ``offset`` in the I/O buffer, returning that
actual number of bytes copied out. actual number of bytes copied out.
.. c:function:: int iob_clone(FAR struct iob_s *iob1, FAR struct iob_s *iob2, bool throttled) .. c:function:: int iob_clone(FAR struct iob_s *iob1, FAR struct iob_s *iob2, \
bool throttled, bool block);
Duplicate (and pack) the data in ``iob1`` in Duplicate (and pack) the data in ``iob1`` in
``iob2``. ``iob2`` must be empty. ``iob2``. ``iob2`` must be empty.

4
include/nuttx/mm/iob.h
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@ -464,8 +464,8 @@ unsigned int iob_tailroom(FAR struct iob_s *iob);
* *
****************************************************************************/ ****************************************************************************/
int iob_clone(FAR struct iob_s *iob1, int iob_clone(FAR struct iob_s *iob1, FAR struct iob_s *iob2,
FAR struct iob_s *iob2, bool throttled); bool throttled, bool block);
/**************************************************************************** /****************************************************************************
* Name: iob_concat * Name: iob_concat

11
mm/iob/iob_clone.c
View File

@ -53,7 +53,8 @@
* *
****************************************************************************/ ****************************************************************************/
int iob_clone(FAR struct iob_s *iob1, FAR struct iob_s *iob2, bool throttled) int iob_clone(FAR struct iob_s *iob1, FAR struct iob_s *iob2,
bool throttled, bool block)
{ {
FAR uint8_t *src; FAR uint8_t *src;
FAR uint8_t *dest; FAR uint8_t *dest;
@ -145,7 +146,15 @@ int iob_clone(FAR struct iob_s *iob1, FAR struct iob_s *iob2, bool throttled)
* destination I/O buffer chain. * destination I/O buffer chain.
*/ */
if (block)
{
next = iob_alloc(throttled); next = iob_alloc(throttled);
}
else
{
next = iob_tryalloc(throttled);
}
if (!next) if (!next)
{ {
ioberr("ERROR: Failed to allocate an I/O buffer\n"); ioberr("ERROR: Failed to allocate an I/O buffer\n");