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[Driver/ringbuffer]: Fix put_force bug 

OXape reports: http://www.rt-thread.org/phpBB3/topic3939.html
          driver/ringbuffer: when data length is bigger than space length
          for rb, the read_index in rb is not update.
    When length > space, update the read_index, the bug can be fix, and
          works fine.
This commit is contained in:
Bright Pan 2015-01-23 13:27:52 +08:00
parent 2475568190
commit 2d67fe6565
1 changed files with 5 additions and 5 deletions
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10
components/drivers/src/ringbuffer.c
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@ -100,13 +100,13 @@ rt_size_t rt_ringbuffer_put_force(struct rt_ringbuffer *rb,
const rt_uint8_t *ptr,
rt_uint16_t length)
{
enum rt_ringbuffer_state old_state;
rt_uint16_t space_length;
RT_ASSERT(rb != RT_NULL);
old_state = rt_ringbuffer_status(rb);
space_length = rt_ringbuffer_space_len(rb);
if (length > rb->buffer_size)
if (length > space_length)
length = rb->buffer_size;
if (rb->buffer_size - rb->write_index > length)
@ -117,7 +117,7 @@ rt_size_t rt_ringbuffer_put_force(struct rt_ringbuffer *rb,
* length of data in current mirror */
rb->write_index += length;
if (old_state == RT_RINGBUFFER_FULL)
if (length > space_length)
rb->read_index = rb->write_index;
return length;
@ -134,7 +134,7 @@ rt_size_t rt_ringbuffer_put_force(struct rt_ringbuffer *rb,
rb->write_mirror = ~rb->write_mirror;
rb->write_index = length - (rb->buffer_size - rb->write_index);
if (old_state == RT_RINGBUFFER_FULL)
if (length > space_length)
{
rb->read_mirror = ~rb->read_mirror;
rb->read_index = rb->write_index;