Re: List iterator assignment fails, assert iterator not dereferencable
"David Bilsby" <d.bilsby@virgin.net> wrote in message
news:fecvoh$ftr$1$8300dec7@news.demon.co.uk
This all works fine up to the point I benchmarked 4 DMA channels from
4 threads. I carefully protected the low level classes list access,
both read and write, with a mutex to prevent multiple threads
updating the list together and from some debugging output to stderr I
am confident that this is valid.
Nevertheless, look for race conditions in your code. For example:
// Store iterator away in higher level class for channel.
m_phUserDMABufHandles[m_numUserDMABufHandles] = hLockedBufHandle;
m_numUserDMABufHandles++;
Those two lines are running under a critical section or a mutex, right?
Because otherwise you can easily end up with an uninitialized iterator
in the array.
--
With best wishes,
Igor Tandetnik
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